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diff --git a/src/regex_syntax/parser.rs.html b/src/regex_syntax/parser.rs.html new file mode 100644 index 0000000..3f94959 --- /dev/null +++ b/src/regex_syntax/parser.rs.html @@ -0,0 +1,4751 @@ +<!DOCTYPE html> +<html lang="en"> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + <meta name="generator" content="rustdoc"> + <meta name="description" content="Source to the Rust file `/home/travis/.cargo/registry/src/github.com-0a35038f75765ae4/regex-syntax-0.1.2/src/parser.rs`."> + <meta name="keywords" content="rust, rustlang, rust-lang"> + + <title>parser.rs.html -- source</title> + + <link rel="stylesheet" type="text/css" href="../../main.css"> + + + +</head> +<body class="rustdoc"> + <!--[if lte IE 8]> + <div class="warning"> + This old browser is unsupported and will most likely display funky + things. + </div> + <![endif]--> + + + + <section class="sidebar"> + + + </section> + + <nav class="sub"> + <form class="search-form js-only"> + <div class="search-container"> + <input class="search-input" name="search" + autocomplete="off" + placeholder="Click or press 'S' to search, '?' for more options..." + type="search"> + </div> + </form> + </nav> + + <section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span> +<span id="2"> 2</span> +<span id="3"> 3</span> +<span id="4"> 4</span> +<span id="5"> 5</span> +<span id="6"> 6</span> +<span id="7"> 7</span> +<span id="8"> 8</span> +<span id="9"> 9</span> +<span id="10"> 10</span> +<span id="11"> 11</span> +<span id="12"> 12</span> +<span id="13"> 13</span> +<span id="14"> 14</span> +<span id="15"> 15</span> +<span id="16"> 16</span> +<span id="17"> 17</span> +<span id="18"> 18</span> +<span id="19"> 19</span> +<span id="20"> 20</span> +<span id="21"> 21</span> +<span id="22"> 22</span> +<span id="23"> 23</span> +<span id="24"> 24</span> +<span id="25"> 25</span> +<span id="26"> 26</span> +<span id="27"> 27</span> +<span id="28"> 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id="1779">1779</span> +<span id="1780">1780</span> +<span id="1781">1781</span> +<span id="1782">1782</span> +<span id="1783">1783</span> +<span id="1784">1784</span> +<span id="1785">1785</span> +<span id="1786">1786</span> +<span id="1787">1787</span> +<span id="1788">1788</span> +<span id="1789">1789</span> +<span id="1790">1790</span> +<span id="1791">1791</span> +<span id="1792">1792</span> +<span id="1793">1793</span> +<span id="1794">1794</span> +<span id="1795">1795</span> +<span id="1796">1796</span> +<span id="1797">1797</span> +<span id="1798">1798</span> +<span id="1799">1799</span> +<span id="1800">1800</span> +<span id="1801">1801</span> +<span id="1802">1802</span> +<span id="1803">1803</span> +<span id="1804">1804</span> +<span id="1805">1805</span> +<span id="1806">1806</span> +<span id="1807">1807</span> +<span id="1808">1808</span> +<span id="1809">1809</span> +<span id="1810">1810</span> +<span id="1811">1811</span> +<span id="1812">1812</span> +<span id="1813">1813</span> +<span id="1814">1814</span> +<span id="1815">1815</span> +<span id="1816">1816</span> +<span id="1817">1817</span> +<span id="1818">1818</span> +<span id="1819">1819</span> +<span id="1820">1820</span> +<span id="1821">1821</span> +<span id="1822">1822</span> +<span id="1823">1823</span> +<span id="1824">1824</span> +<span id="1825">1825</span> +<span id="1826">1826</span> +<span id="1827">1827</span> +<span id="1828">1828</span> +<span id="1829">1829</span> +<span id="1830">1830</span> +<span id="1831">1831</span> +<span id="1832">1832</span> +<span id="1833">1833</span> +<span id="1834">1834</span> +<span id="1835">1835</span> +<span id="1836">1836</span> +<span id="1837">1837</span> +<span id="1838">1838</span> +<span id="1839">1839</span> +<span id="1840">1840</span> +<span id="1841">1841</span> +<span id="1842">1842</span> +<span id="1843">1843</span> +<span id="1844">1844</span> +<span id="1845">1845</span> +<span id="1846">1846</span> +<span id="1847">1847</span> +<span id="1848">1848</span> +<span id="1849">1849</span> +<span id="1850">1850</span> +<span id="1851">1851</span> +<span id="1852">1852</span> +<span id="1853">1853</span> +<span id="1854">1854</span> +<span id="1855">1855</span> +<span id="1856">1856</span> +<span id="1857">1857</span> +<span id="1858">1858</span> +<span id="1859">1859</span> +<span id="1860">1860</span> +<span id="1861">1861</span> +<span id="1862">1862</span> +<span id="1863">1863</span> +<span id="1864">1864</span> +<span id="1865">1865</span> +<span id="1866">1866</span> +<span id="1867">1867</span> +<span id="1868">1868</span> +<span id="1869">1869</span> +<span id="1870">1870</span> +<span id="1871">1871</span> +<span id="1872">1872</span> +<span id="1873">1873</span> +<span id="1874">1874</span> +<span id="1875">1875</span> +<span id="1876">1876</span> +<span id="1877">1877</span> +<span id="1878">1878</span> +<span id="1879">1879</span> +<span id="1880">1880</span> +<span id="1881">1881</span> +<span id="1882">1882</span> +<span id="1883">1883</span> +<span id="1884">1884</span> +<span id="1885">1885</span> +<span id="1886">1886</span> +<span id="1887">1887</span> +<span id="1888">1888</span> +<span id="1889">1889</span> +<span id="1890">1890</span> +<span id="1891">1891</span> +<span id="1892">1892</span> +<span id="1893">1893</span> +<span id="1894">1894</span> +<span id="1895">1895</span> +<span id="1896">1896</span> +<span id="1897">1897</span> +<span id="1898">1898</span> +<span id="1899">1899</span> +<span id="1900">1900</span> +<span id="1901">1901</span> +<span id="1902">1902</span> +<span id="1903">1903</span> +<span id="1904">1904</span> +<span id="1905">1905</span> +<span id="1906">1906</span> +<span id="1907">1907</span> +<span id="1908">1908</span> +<span id="1909">1909</span> +<span id="1910">1910</span> +<span id="1911">1911</span> +<span id="1912">1912</span> +<span id="1913">1913</span> +<span id="1914">1914</span> +<span id="1915">1915</span> +<span id="1916">1916</span> +<span id="1917">1917</span> +<span id="1918">1918</span> +<span id="1919">1919</span> +<span id="1920">1920</span> +<span id="1921">1921</span> +<span id="1922">1922</span> +<span id="1923">1923</span> +<span id="1924">1924</span> +<span id="1925">1925</span> +<span id="1926">1926</span> +<span id="1927">1927</span> +<span id="1928">1928</span> +<span id="1929">1929</span> +<span id="1930">1930</span> +<span id="1931">1931</span> +<span id="1932">1932</span> +<span id="1933">1933</span> +<span id="1934">1934</span> +<span id="1935">1935</span> +<span id="1936">1936</span> +<span id="1937">1937</span> +<span id="1938">1938</span> +<span id="1939">1939</span> +<span id="1940">1940</span> +<span id="1941">1941</span> +<span id="1942">1942</span> +<span id="1943">1943</span> +<span id="1944">1944</span> +<span id="1945">1945</span> +<span id="1946">1946</span> +<span id="1947">1947</span> +<span id="1948">1948</span> +<span id="1949">1949</span> +<span id="1950">1950</span> +<span id="1951">1951</span> +<span id="1952">1952</span> +<span id="1953">1953</span> +<span id="1954">1954</span> +<span id="1955">1955</span> +<span id="1956">1956</span> +<span id="1957">1957</span> +<span id="1958">1958</span> +<span id="1959">1959</span> +<span id="1960">1960</span> +<span id="1961">1961</span> +<span id="1962">1962</span> +<span id="1963">1963</span> +<span id="1964">1964</span> +<span id="1965">1965</span> +<span id="1966">1966</span> +<span id="1967">1967</span> +<span id="1968">1968</span> +<span id="1969">1969</span> +<span id="1970">1970</span> +<span id="1971">1971</span> +<span id="1972">1972</span> +<span id="1973">1973</span> +<span id="1974">1974</span> +<span id="1975">1975</span> +<span id="1976">1976</span> +<span id="1977">1977</span> +<span id="1978">1978</span> +<span id="1979">1979</span> +<span id="1980">1980</span> +<span id="1981">1981</span> +<span id="1982">1982</span> +<span id="1983">1983</span> +<span id="1984">1984</span> +<span id="1985">1985</span> +<span id="1986">1986</span> +<span id="1987">1987</span> +<span id="1988">1988</span> +<span id="1989">1989</span> +<span id="1990">1990</span> +<span id="1991">1991</span> +<span id="1992">1992</span> +<span id="1993">1993</span> +<span id="1994">1994</span> +<span id="1995">1995</span> +<span id="1996">1996</span> +<span id="1997">1997</span> +<span id="1998">1998</span> +<span id="1999">1999</span> +<span id="2000">2000</span> +<span id="2001">2001</span> +<span id="2002">2002</span> +<span id="2003">2003</span> +<span id="2004">2004</span> +<span id="2005">2005</span> +<span id="2006">2006</span> +<span id="2007">2007</span> +<span id="2008">2008</span> +<span id="2009">2009</span> +<span id="2010">2010</span> +<span id="2011">2011</span> +<span id="2012">2012</span> +<span id="2013">2013</span> +<span id="2014">2014</span> +<span id="2015">2015</span> +<span id="2016">2016</span> +<span id="2017">2017</span> +<span id="2018">2018</span> +<span id="2019">2019</span> +<span id="2020">2020</span> +<span id="2021">2021</span> +<span id="2022">2022</span> +<span id="2023">2023</span> +<span id="2024">2024</span> +<span id="2025">2025</span> +<span id="2026">2026</span> +<span id="2027">2027</span> +<span id="2028">2028</span> +<span id="2029">2029</span> +<span id="2030">2030</span> +<span id="2031">2031</span> +<span id="2032">2032</span> +<span id="2033">2033</span> +<span id="2034">2034</span> +<span id="2035">2035</span> +<span id="2036">2036</span> +<span id="2037">2037</span> +<span id="2038">2038</span> +<span id="2039">2039</span> +<span id="2040">2040</span> +<span id="2041">2041</span> +<span id="2042">2042</span> +<span id="2043">2043</span> +<span id="2044">2044</span> +<span id="2045">2045</span> +<span id="2046">2046</span> +<span id="2047">2047</span> +<span id="2048">2048</span> +<span id="2049">2049</span> +<span id="2050">2050</span> +<span id="2051">2051</span> +<span id="2052">2052</span> +<span id="2053">2053</span> +<span id="2054">2054</span> +<span id="2055">2055</span> +<span id="2056">2056</span> +<span id="2057">2057</span> +<span id="2058">2058</span> +<span id="2059">2059</span> +<span id="2060">2060</span> +<span id="2061">2061</span> +<span id="2062">2062</span> +<span id="2063">2063</span> +<span id="2064">2064</span> +<span id="2065">2065</span> +<span id="2066">2066</span> +<span id="2067">2067</span> +<span id="2068">2068</span> +<span id="2069">2069</span> +<span id="2070">2070</span> +<span id="2071">2071</span> +<span id="2072">2072</span> +<span id="2073">2073</span> +<span id="2074">2074</span> +<span id="2075">2075</span> +<span id="2076">2076</span> +<span id="2077">2077</span> +<span id="2078">2078</span> +<span id="2079">2079</span> +<span id="2080">2080</span> +<span id="2081">2081</span> +<span id="2082">2082</span> +<span id="2083">2083</span> +<span id="2084">2084</span> +<span id="2085">2085</span> +<span id="2086">2086</span> +<span id="2087">2087</span> +<span id="2088">2088</span> +<span id="2089">2089</span> +<span id="2090">2090</span> +<span id="2091">2091</span> +<span id="2092">2092</span> +<span id="2093">2093</span> +<span id="2094">2094</span> +<span id="2095">2095</span> +<span id="2096">2096</span> +<span id="2097">2097</span> +<span id="2098">2098</span> +<span id="2099">2099</span> +<span id="2100">2100</span> +<span id="2101">2101</span> +<span id="2102">2102</span> +<span id="2103">2103</span> +<span id="2104">2104</span> +<span id="2105">2105</span> +<span id="2106">2106</span> +<span id="2107">2107</span> +<span id="2108">2108</span> +<span id="2109">2109</span> +<span id="2110">2110</span> +<span id="2111">2111</span> +<span id="2112">2112</span> +<span id="2113">2113</span> +<span id="2114">2114</span> +<span id="2115">2115</span> +<span id="2116">2116</span> +<span id="2117">2117</span> +<span id="2118">2118</span> +<span id="2119">2119</span> +<span id="2120">2120</span> +<span id="2121">2121</span> +<span id="2122">2122</span> +<span id="2123">2123</span> +<span id="2124">2124</span> +<span id="2125">2125</span> +<span id="2126">2126</span> +<span id="2127">2127</span> +<span id="2128">2128</span> +<span id="2129">2129</span> +<span id="2130">2130</span> +<span id="2131">2131</span> +<span id="2132">2132</span> +<span id="2133">2133</span> +<span id="2134">2134</span> +<span id="2135">2135</span> +<span id="2136">2136</span> +<span id="2137">2137</span> +<span id="2138">2138</span> +<span id="2139">2139</span> +<span id="2140">2140</span> +<span id="2141">2141</span> +<span id="2142">2142</span> +<span id="2143">2143</span> +<span id="2144">2144</span> +<span id="2145">2145</span> +<span id="2146">2146</span> +<span id="2147">2147</span> +<span id="2148">2148</span> +<span id="2149">2149</span> +<span id="2150">2150</span> +<span id="2151">2151</span> +<span id="2152">2152</span> +<span id="2153">2153</span> +<span id="2154">2154</span> +<span id="2155">2155</span> +<span id="2156">2156</span> +<span id="2157">2157</span> +<span id="2158">2158</span> +<span id="2159">2159</span> +<span id="2160">2160</span> +<span id="2161">2161</span> +<span id="2162">2162</span> +<span id="2163">2163</span> +<span id="2164">2164</span> +<span id="2165">2165</span> +<span id="2166">2166</span> +<span id="2167">2167</span> +<span id="2168">2168</span> +<span id="2169">2169</span> +<span id="2170">2170</span> +<span id="2171">2171</span> +<span id="2172">2172</span> +<span id="2173">2173</span> +<span id="2174">2174</span> +<span id="2175">2175</span> +<span id="2176">2176</span> +<span id="2177">2177</span> +<span id="2178">2178</span> +<span id="2179">2179</span> +<span id="2180">2180</span> +<span id="2181">2181</span> +<span id="2182">2182</span> +<span id="2183">2183</span> +<span id="2184">2184</span> +<span id="2185">2185</span> +<span id="2186">2186</span> +<span id="2187">2187</span> +<span id="2188">2188</span> +<span id="2189">2189</span> +<span id="2190">2190</span> +<span id="2191">2191</span> +<span id="2192">2192</span> +<span id="2193">2193</span> +<span id="2194">2194</span> +<span id="2195">2195</span> +<span id="2196">2196</span> +<span id="2197">2197</span> +<span id="2198">2198</span> +<span id="2199">2199</span> +<span id="2200">2200</span> +<span id="2201">2201</span> +<span id="2202">2202</span> +<span id="2203">2203</span> +<span id="2204">2204</span> +<span id="2205">2205</span> +<span id="2206">2206</span> +<span id="2207">2207</span> +<span id="2208">2208</span> +<span id="2209">2209</span> +<span id="2210">2210</span> +<span id="2211">2211</span> +<span id="2212">2212</span> +<span id="2213">2213</span> +<span id="2214">2214</span> +<span id="2215">2215</span> +<span id="2216">2216</span> +<span id="2217">2217</span> +<span id="2218">2218</span> +<span id="2219">2219</span> +<span id="2220">2220</span> +<span id="2221">2221</span> +<span id="2222">2222</span> +<span id="2223">2223</span> +<span id="2224">2224</span> +<span id="2225">2225</span> +<span id="2226">2226</span> +<span id="2227">2227</span> +<span id="2228">2228</span> +<span id="2229">2229</span> +<span id="2230">2230</span> +<span id="2231">2231</span> +<span id="2232">2232</span> +<span id="2233">2233</span> +<span id="2234">2234</span> +<span id="2235">2235</span> +<span id="2236">2236</span> +<span id="2237">2237</span> +<span id="2238">2238</span> +<span id="2239">2239</span> +<span id="2240">2240</span> +<span id="2241">2241</span> +<span id="2242">2242</span> +<span id="2243">2243</span> +<span id="2244">2244</span> +<span id="2245">2245</span> +<span id="2246">2246</span> +<span id="2247">2247</span> +<span id="2248">2248</span> +<span id="2249">2249</span> +<span id="2250">2250</span> +<span id="2251">2251</span> +<span id="2252">2252</span> +<span id="2253">2253</span> +<span id="2254">2254</span> +<span id="2255">2255</span> +<span id="2256">2256</span> +<span id="2257">2257</span> +<span id="2258">2258</span> +<span id="2259">2259</span> +<span id="2260">2260</span> +<span id="2261">2261</span> +<span id="2262">2262</span> +<span id="2263">2263</span> +<span id="2264">2264</span> +<span id="2265">2265</span> +<span id="2266">2266</span> +<span id="2267">2267</span> +<span id="2268">2268</span> +<span id="2269">2269</span> +<span id="2270">2270</span> +<span id="2271">2271</span> +<span id="2272">2272</span> +<span id="2273">2273</span> +<span id="2274">2274</span> +<span id="2275">2275</span> +<span id="2276">2276</span> +<span id="2277">2277</span> +<span id="2278">2278</span> +<span id="2279">2279</span> +<span id="2280">2280</span> +<span id="2281">2281</span> +<span id="2282">2282</span> +<span id="2283">2283</span> +<span id="2284">2284</span> +<span id="2285">2285</span> +<span id="2286">2286</span> +<span id="2287">2287</span> +<span id="2288">2288</span> +<span id="2289">2289</span> +<span id="2290">2290</span> +<span id="2291">2291</span> +<span id="2292">2292</span> +<span id="2293">2293</span> +<span id="2294">2294</span> +<span id="2295">2295</span> +<span id="2296">2296</span> +<span id="2297">2297</span> +<span id="2298">2298</span> +<span id="2299">2299</span> +<span id="2300">2300</span> +<span id="2301">2301</span> +<span id="2302">2302</span> +<span id="2303">2303</span> +<span id="2304">2304</span> +<span id="2305">2305</span> +<span id="2306">2306</span> +<span id="2307">2307</span> +<span id="2308">2308</span> +<span id="2309">2309</span> +<span id="2310">2310</span> +<span id="2311">2311</span> +<span id="2312">2312</span> +<span id="2313">2313</span> +<span id="2314">2314</span> +<span id="2315">2315</span> +<span id="2316">2316</span> +<span id="2317">2317</span> +<span id="2318">2318</span> +<span id="2319">2319</span> +<span id="2320">2320</span> +<span id="2321">2321</span> +<span id="2322">2322</span> +<span id="2323">2323</span> +<span id="2324">2324</span> +<span id="2325">2325</span> +<span id="2326">2326</span> +<span id="2327">2327</span> +</pre><pre class='rust '> +<span class='comment'>// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT</span> +<span class='comment'>// file at the top-level directory of this distribution and at</span> +<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span> +<span class='comment'>//</span> +<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> +<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> +<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> +<span class='comment'>// option. This file may not be copied, modified, or distributed</span> +<span class='comment'>// except according to those terms.</span> + +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>cmp</span>::{<span class='ident'>max</span>, <span class='ident'>min</span>}; + +<span class='kw'>use</span> <span class='ident'>unicode</span>::<span class='ident'>regex</span>::<span class='ident'>UNICODE_CLASSES</span>; + +<span class='kw'>use</span> { + <span class='ident'>Expr</span>, <span class='ident'>Repeater</span>, <span class='ident'>CharClass</span>, <span class='ident'>ClassRange</span>, <span class='ident'>CaptureIndex</span>, <span class='ident'>CaptureName</span>, + <span class='ident'>Error</span>, <span class='ident'>ErrorKind</span>, <span class='prelude-ty'>Result</span>, +}; + +<span class='doccomment'>/// Parser state.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Keeps the entire input in memory and maintains a cursor (char offset).</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// It also keeps an expression stack, which is responsible for managing</span> +<span class='doccomment'>/// grouped expressions and flag state.</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Parser</span> { + <span class='ident'>chars</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>char</span><span class='op'>></span>, + <span class='ident'>chari</span>: <span class='ident'>usize</span>, + <span class='ident'>stack</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span>, + <span class='ident'>caps</span>: <span class='ident'>usize</span>, + <span class='ident'>names</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>String</span><span class='op'>></span>, <span class='comment'>// to check for duplicates</span> + <span class='ident'>flags</span>: <span class='ident'>Flags</span>, +} + +<span class='doccomment'>/// An empheral type for representing the expression stack.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Everything on the stack is either a regular expression or a marker</span> +<span class='doccomment'>/// indicating the opening of a group (possibly non-capturing). The opening</span> +<span class='doccomment'>/// of a group copies the current flag state, which is reset on the parser</span> +<span class='doccomment'>/// state once the group closes.</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> +<span class='kw'>enum</span> <span class='ident'>Build</span> { + <span class='ident'>Expr</span>(<span class='ident'>Expr</span>), + <span class='ident'>LeftParen</span> { + <span class='ident'>i</span>: <span class='ident'>CaptureIndex</span>, + <span class='ident'>name</span>: <span class='ident'>CaptureName</span>, + <span class='ident'>chari</span>: <span class='ident'>usize</span>, + <span class='ident'>old_flags</span>: <span class='ident'>Flags</span>, + }, +} + +<span class='doccomment'>/// Flag state.</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Debug</span>)]</span> +<span class='kw'>struct</span> <span class='ident'>Flags</span> { + <span class='ident'>casei</span>: <span class='ident'>bool</span>, + <span class='ident'>multi</span>: <span class='ident'>bool</span>, + <span class='ident'>dotnl</span>: <span class='ident'>bool</span>, + <span class='ident'>swap_greed</span>: <span class='ident'>bool</span>, + <span class='ident'>ignore_space</span>: <span class='ident'>bool</span>, +} + +<span class='comment'>// Primary expression parsing routines.</span> +<span class='kw'>impl</span> <span class='ident'>Parser</span> { + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>parse</span>(<span class='ident'>s</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Expr</span><span class='op'>></span> { + <span class='ident'>Parser</span> { + <span class='ident'>chars</span>: <span class='ident'>s</span>.<span class='ident'>chars</span>().<span class='ident'>collect</span>(), + <span class='ident'>chari</span>: <span class='number'>0</span>, + <span class='ident'>stack</span>: <span class='macro'>vec</span><span class='macro'>!</span>[], + <span class='ident'>caps</span>: <span class='number'>0</span>, + <span class='ident'>names</span>: <span class='macro'>vec</span><span class='macro'>!</span>[], + <span class='ident'>flags</span>: <span class='ident'>Flags</span> { + <span class='ident'>casei</span>: <span class='boolval'>false</span>, + <span class='ident'>multi</span>: <span class='boolval'>false</span>, + <span class='ident'>dotnl</span>: <span class='boolval'>false</span>, + <span class='ident'>swap_greed</span>: <span class='boolval'>false</span>, + <span class='ident'>ignore_space</span>: <span class='boolval'>false</span>, + }, + }.<span class='ident'>parse_expr</span>() + } + + <span class='comment'>// Top-level expression parser.</span> + <span class='comment'>//</span> + <span class='comment'>// Starts at the beginning of the input and consumes until either the end</span> + <span class='comment'>// of input or an error.</span> + <span class='kw'>fn</span> <span class='ident'>parse_expr</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Expr</span><span class='op'>></span> { + <span class='kw'>while</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='kw'>let</span> <span class='ident'>build_expr</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>cur</span>() { + <span class='string'>'\\'</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_escape</span>()), + <span class='string'>'|'</span> <span class='op'>=></span> { <span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>alternate</span>()); <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='ident'>e</span> } + <span class='string'>'?'</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_simple_repeat</span>(<span class='ident'>Repeater</span>::<span class='ident'>ZeroOrOne</span>)), + <span class='string'>'*'</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_simple_repeat</span>(<span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>)), + <span class='string'>'+'</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_simple_repeat</span>(<span class='ident'>Repeater</span>::<span class='ident'>OneOrMore</span>)), + <span class='string'>'{'</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_counted_repeat</span>()), + <span class='string'>'['</span> <span class='op'>=></span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>maybe_parse_ascii</span>() { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_class</span>()), + <span class='prelude-val'>Some</span>(<span class='ident'>cls</span>) <span class='op'>=></span> <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>)), + }, + <span class='string'>'^'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>multi</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>StartLine</span>) + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>StartText</span>) + } + } + <span class='string'>'$'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>multi</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>EndLine</span>) + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>EndText</span>) + } + } + <span class='string'>'.'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>dotnl</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>AnyChar</span>) + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>parse_one</span>(<span class='ident'>Expr</span>::<span class='ident'>AnyCharNoNL</span>) + } + } + <span class='string'>'('</span> <span class='op'>=></span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_group</span>()), + <span class='string'>')'</span> <span class='op'>=></span> { + <span class='kw'>let</span> (<span class='ident'>old_flags</span>, <span class='ident'>e</span>) <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>close_paren</span>()); + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='self'>self</span>.<span class='ident'>flags</span> <span class='op'>=</span> <span class='ident'>old_flags</span>; + <span class='ident'>e</span> + } + _ <span class='op'>=></span> <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { + <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='self'>self</span>.<span class='ident'>bump</span>()], + <span class='ident'>casei</span>: <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span>, + }), + }; + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>build_expr</span>.<span class='ident'>is_empty</span>() { + <span class='kw'>let</span> <span class='ident'>build_expr</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>maybe_class_case_fold</span>(<span class='ident'>build_expr</span>); + <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>push</span>(<span class='ident'>build_expr</span>); + } + } + <span class='self'>self</span>.<span class='ident'>finish_concat</span>() + } + + <span class='comment'>// Parses an escape sequence, e.g., \Ax</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `\`</span> + <span class='comment'>// End: `x`</span> + <span class='kw'>fn</span> <span class='ident'>parse_escape</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedEscapeEof</span>)); + } + <span class='kw'>let</span> <span class='ident'>c</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>cur</span>(); + <span class='kw'>if</span> <span class='ident'>is_punct</span>(<span class='ident'>c</span>) { + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { + <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='self'>self</span>.<span class='ident'>bump</span>()], + <span class='ident'>casei</span>: <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span>, + })); + } + + <span class='kw'>fn</span> <span class='ident'>lit</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>Build</span> { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>c</span>], <span class='ident'>casei</span>: <span class='boolval'>false</span> }) + } + <span class='kw'>match</span> <span class='ident'>c</span> { + <span class='string'>'a'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\x07'</span>)) } + <span class='string'>'f'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\x0C'</span>)) } + <span class='string'>'t'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\t'</span>)) } + <span class='string'>'n'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\n'</span>)) } + <span class='string'>'r'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\r'</span>)) } + <span class='string'>'v'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>lit</span>(<span class='string'>'\x0B'</span>)) } + <span class='string'>'A'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>StartText</span>)) } + <span class='string'>'z'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>EndText</span>)) } + <span class='string'>'b'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>WordBoundary</span>)) } + <span class='string'>'B'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>NotWordBoundary</span>)) } + <span class='string'>'0'</span><span class='op'>|</span><span class='string'>'1'</span><span class='op'>|</span><span class='string'>'2'</span><span class='op'>|</span><span class='string'>'3'</span><span class='op'>|</span><span class='string'>'4'</span><span class='op'>|</span><span class='string'>'5'</span><span class='op'>|</span><span class='string'>'6'</span><span class='op'>|</span><span class='string'>'7'</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>parse_octal</span>(), + <span class='string'>'x'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='self'>self</span>.<span class='ident'>parse_hex</span>() } + <span class='string'>'p'</span><span class='op'>|</span><span class='string'>'P'</span> <span class='op'>=></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='self'>self</span>.<span class='ident'>parse_unicode_class</span>(<span class='ident'>c</span> <span class='op'>==</span> <span class='string'>'P'</span>) + .<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>cls</span><span class='op'>|</span> <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>))) + } + <span class='string'>'d'</span><span class='op'>|</span><span class='string'>'s'</span><span class='op'>|</span><span class='string'>'w'</span><span class='op'>|</span><span class='string'>'D'</span><span class='op'>|</span><span class='string'>'S'</span><span class='op'>|</span><span class='string'>'W'</span> <span class='op'>=></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='self'>self</span>.<span class='ident'>parse_perl_class</span>(<span class='ident'>c</span>)))) + } + <span class='ident'>c</span> <span class='op'>=></span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedEscape</span>(<span class='ident'>c</span>))), + } + } + + <span class='comment'>// Parses a group, e.g., `(abc)`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `(`</span> + <span class='comment'>// End: `a`</span> + <span class='comment'>//</span> + <span class='comment'>// A more interesting example, `(?P<foo>abc)`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `(`</span> + <span class='comment'>// End: `a`</span> + <span class='kw'>fn</span> <span class='ident'>parse_group</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>chari</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>chari</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>name</span>: <span class='ident'>CaptureName</span> <span class='op'>=</span> <span class='prelude-val'>None</span>; + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>"?P<"</span>) { + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_group_name</span>()); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>names</span>.<span class='ident'>iter</span>().<span class='ident'>any</span>(<span class='op'>|</span><span class='ident'>n2</span><span class='op'>|</span> <span class='ident'>n2</span> <span class='op'>==</span> <span class='kw-2'>&</span><span class='ident'>n</span>) { + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>DuplicateCaptureName</span>(<span class='ident'>n</span>))); + } + <span class='self'>self</span>.<span class='ident'>names</span>.<span class='ident'>push</span>(<span class='ident'>n</span>.<span class='ident'>clone</span>()); + <span class='ident'>name</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>n</span>); + } <span class='kw'>else</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>"?"</span>) { + <span class='comment'>// This can never be capturing. It's either setting flags for</span> + <span class='comment'>// the current group, or it's opening a non-capturing group or</span> + <span class='comment'>// it's opening a group with a specific set of flags (which is</span> + <span class='comment'>// also non-capturing).</span> + <span class='comment'>// Anything else is an error.</span> + <span class='kw'>return</span> <span class='self'>self</span>.<span class='ident'>parse_group_flags</span>(<span class='ident'>chari</span>); + } + <span class='self'>self</span>.<span class='ident'>caps</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>caps</span>, <span class='number'>1</span>); + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span> { + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>caps</span>), + <span class='ident'>name</span>: <span class='ident'>name</span>, + <span class='ident'>chari</span>: <span class='ident'>chari</span>, + <span class='ident'>old_flags</span>: <span class='self'>self</span>.<span class='ident'>flags</span>, <span class='comment'>// no flags changed if we're here</span> + }) + } + + <span class='comment'>// Parses flags (inline or grouped), e.g., `(?s-i:abc)`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `s`</span> + <span class='comment'>// End: `a`</span> + <span class='comment'>//</span> + <span class='comment'>// Another example, `(?s-i)a`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `s`</span> + <span class='comment'>// End: `a`</span> + <span class='kw'>fn</span> <span class='ident'>parse_group_flags</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>opening_chari</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>old_flags</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>flags</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sign</span> <span class='op'>=</span> <span class='boolval'>true</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>false</span>; + <span class='kw'>loop</span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='comment'>// e.g., (?i</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedFlagEof</span>)); + } + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>cur</span>() { + <span class='string'>'i'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span> <span class='op'>=</span> <span class='ident'>sign</span>; <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>true</span> } + <span class='string'>'m'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>multi</span> <span class='op'>=</span> <span class='ident'>sign</span>; <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>true</span> } + <span class='string'>'s'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>dotnl</span> <span class='op'>=</span> <span class='ident'>sign</span>; <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>true</span> } + <span class='string'>'U'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>swap_greed</span> <span class='op'>=</span> <span class='ident'>sign</span>; <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>true</span> } + <span class='string'>'x'</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>ignore_space</span> <span class='op'>=</span> <span class='ident'>sign</span>; <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>true</span> } + <span class='string'>'-'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>sign</span> { + <span class='comment'>// e.g., (?-i-s)</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>DoubleFlagNegation</span>)); + } + <span class='ident'>sign</span> <span class='op'>=</span> <span class='boolval'>false</span>; + <span class='ident'>saw_flag</span> <span class='op'>=</span> <span class='boolval'>false</span>; + } + <span class='string'>')'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>saw_flag</span> { + <span class='comment'>// e.g., (?)</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyFlagNegation</span>)); + } + <span class='comment'>// At this point, we're just changing the flags inside</span> + <span class='comment'>// the current group, which means the old flags have</span> + <span class='comment'>// been saved elsewhere. Our modifications in place are</span> + <span class='comment'>// okey dokey!</span> + <span class='comment'>//</span> + <span class='comment'>// This particular flag expression only has a stateful</span> + <span class='comment'>// impact on a regex's AST, so nothing gets explicitly</span> + <span class='comment'>// added.</span> + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Empty</span>)); + } + <span class='string'>':'</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>sign</span> <span class='op'>&&</span> <span class='op'>!</span><span class='ident'>saw_flag</span> { + <span class='comment'>// e.g., (?i-:a)</span> + <span class='comment'>// Note that if there's no negation, it's OK not</span> + <span class='comment'>// to see flag, because you end up with a regular</span> + <span class='comment'>// non-capturing group: `(?:a)`.</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyFlagNegation</span>)); + } + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span> { + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + <span class='ident'>chari</span>: <span class='ident'>opening_chari</span>, + <span class='ident'>old_flags</span>: <span class='ident'>old_flags</span>, + }); + } + <span class='comment'>// e.g., (?z:a)</span> + <span class='ident'>c</span> <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedFlag</span>(<span class='ident'>c</span>))), + } + <span class='self'>self</span>.<span class='ident'>bump</span>(); + } + } + + <span class='comment'>// Parses a group name, e.g., `foo` in `(?P<foo>abc)`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `f`</span> + <span class='comment'>// End: `a`</span> + <span class='kw'>fn</span> <span class='ident'>parse_group_name</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>String</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>name</span> <span class='op'>=</span> <span class='ident'>String</span>::<span class='ident'>new</span>(); + <span class='kw'>while</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>eof</span>() <span class='op'>&&</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>peek_is</span>(<span class='string'>'>'</span>) { + <span class='ident'>name</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>bump</span>()); + } + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='comment'>// e.g., (?P<a</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedCaptureName</span>(<span class='ident'>name</span>))); + } + <span class='kw'>let</span> <span class='ident'>all_valid</span> <span class='op'>=</span> <span class='ident'>name</span>.<span class='ident'>chars</span>().<span class='ident'>all</span>(<span class='ident'>is_valid_capture_char</span>); + <span class='kw'>match</span> <span class='ident'>name</span>.<span class='ident'>chars</span>().<span class='ident'>next</span>() { + <span class='comment'>// e.g., (?P<>a)</span> + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyCaptureName</span>)), + <span class='prelude-val'>Some</span>(<span class='ident'>c</span>) <span class='kw'>if</span> (<span class='ident'>c</span> <span class='op'>>=</span> <span class='string'>'0'</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'><=</span> <span class='string'>'9'</span>) <span class='op'>||</span> <span class='op'>!</span><span class='ident'>all_valid</span> <span class='op'>=></span> { + <span class='comment'>// e.g., (?P<a#>x)</span> + <span class='comment'>// e.g., (?P<1a>x)</span> + <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidCaptureName</span>(<span class='ident'>name</span>))) + } + _ <span class='op'>=></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='comment'>// for `>`</span> + <span class='prelude-val'>Ok</span>(<span class='ident'>name</span>) + } + } + } + + <span class='comment'>// Parses a counted repeition operator, e.g., `a{2,4}?z`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `{`</span> + <span class='comment'>// End: `z`</span> + <span class='kw'>fn</span> <span class='ident'>parse_counted_repeat</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>pop</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterExpectsExpr</span>)); <span class='comment'>// e.g., ({5}</span> + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>e</span>.<span class='ident'>can_repeat</span>() { + <span class='comment'>// e.g., a*{5}</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>e</span>))); + } + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>let</span> <span class='ident'>min</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_decimal</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>','</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>'}'</span>)); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>max_opt</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>min</span>); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>','</span>) { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>peek_is</span>(<span class='string'>'}'</span>) { + <span class='ident'>max_opt</span> <span class='op'>=</span> <span class='prelude-val'>None</span>; + } <span class='kw'>else</span> { + <span class='kw'>let</span> <span class='ident'>max</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_decimal</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>'}'</span>)); + <span class='kw'>if</span> <span class='ident'>min</span> <span class='op'>></span> <span class='ident'>max</span> { + <span class='comment'>// e.g., a{2,1}</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidRepeatRange</span> { + <span class='ident'>min</span>: <span class='ident'>min</span>, + <span class='ident'>max</span>: <span class='ident'>max</span>, + })); + } + <span class='ident'>max_opt</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>max</span>); + } + } + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'}'</span>) { + <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedRepeat</span>)) + } <span class='kw'>else</span> { + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>e</span>), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='ident'>min</span>, <span class='ident'>max</span>: <span class='ident'>max_opt</span> }, + <span class='ident'>greedy</span>: <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'?'</span>) <span class='op'>^</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>swap_greed</span>, + })) + } + } + + <span class='comment'>// Parses a simple repetition operator, e.g., `a+?z`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `+`</span> + <span class='comment'>// End: `z`</span> + <span class='comment'>//</span> + <span class='comment'>// N.B. "simple" in this context means "not min/max repetition",</span> + <span class='comment'>// e.g., `a{1,2}`.</span> + <span class='kw'>fn</span> <span class='ident'>parse_simple_repeat</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>rep</span>: <span class='ident'>Repeater</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>pop</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterExpectsExpr</span>)); <span class='comment'>// e.g., (*</span> + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>e</span>.<span class='ident'>can_repeat</span>() { + <span class='comment'>// e.g., a**</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>e</span>))); + } + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>e</span>), + <span class='ident'>r</span>: <span class='ident'>rep</span>, + <span class='ident'>greedy</span>: <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'?'</span>) <span class='op'>^</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>swap_greed</span>, + })) + } + + <span class='comment'>// Parses a decimal number until the given character, e.g., `a{123,456}`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `1`</span> + <span class='comment'>// End: `,` (where `until == ','`)</span> + <span class='kw'>fn</span> <span class='ident'>parse_decimal</span><span class='op'><</span><span class='ident'>B</span>: <span class='ident'>Bumpable</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>until</span>: <span class='ident'>B</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>u32</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>bump_get</span>(<span class='ident'>until</span>) { + <span class='comment'>// e.g., a{}</span> + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>MissingBase10</span>)), + <span class='prelude-val'>Some</span>(<span class='ident'>n</span>) <span class='op'>=></span> { + <span class='comment'>// e.g., a{xyz</span> + <span class='comment'>// e.g., a{9999999999}</span> + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>n</span>.<span class='ident'>trim</span>(); + <span class='ident'>u32</span>::<span class='ident'>from_str_radix</span>(<span class='ident'>n</span>, <span class='number'>10</span>) + .<span class='ident'>map_err</span>(<span class='op'>|</span>_<span class='op'>|</span> <span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='ident'>n</span>.<span class='ident'>into</span>()))) + } + } + } + + <span class='comment'>// Parses an octal number, up to 3 digits, e.g., `a\123b`</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `1`</span> + <span class='comment'>// End: `b`</span> + <span class='kw'>fn</span> <span class='ident'>parse_octal</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>char</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>i</span> <span class='op'>=</span> <span class='number'>0</span>; <span class='comment'>// counter for limiting octal to 3 digits.</span> + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>bump_get</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> { <span class='ident'>i</span> <span class='op'>+=</span> <span class='number'>1</span>; <span class='ident'>i</span> <span class='op'><=</span> <span class='number'>3</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'>>=</span> <span class='string'>'0'</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'><=</span> <span class='string'>'7'</span> }) + .<span class='ident'>expect</span>(<span class='string'>"octal string"</span>); <span class='comment'>// guaranteed at least 1 digit</span> + <span class='comment'>// I think both of the following unwraps are impossible to fail.</span> + <span class='comment'>// We limit it to a three digit octal number, which maxes out at</span> + <span class='comment'>// `0777` or `511` in decimal. Since all digits are in `0...7`, we'll</span> + <span class='comment'>// always have a valid `u32` number. Moreover, since all numbers in</span> + <span class='comment'>// the range `0...511` are valid Unicode scalar values, it will always</span> + <span class='comment'>// be a valid `char`.</span> + <span class='comment'>//</span> + <span class='comment'>// Hence, we `unwrap` with reckless abandon.</span> + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>u32</span>::<span class='ident'>from_str_radix</span>(<span class='kw-2'>&</span><span class='ident'>n</span>, <span class='number'>8</span>).<span class='ident'>ok</span>().<span class='ident'>expect</span>(<span class='string'>"valid octal number"</span>); + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { + <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>char</span>::<span class='ident'>from_u32</span>(<span class='ident'>n</span>).<span class='ident'>expect</span>(<span class='string'>"Unicode scalar value"</span>)], + <span class='ident'>casei</span>: <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span>, + })) + } + + <span class='comment'>// Parses a hex number, e.g., `a\x5ab`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `5`</span> + <span class='comment'>// End: `b`</span> + <span class='comment'>//</span> + <span class='comment'>// And also, `a\x{2603}b`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `{`</span> + <span class='comment'>// End: `b`</span> + <span class='kw'>fn</span> <span class='ident'>parse_hex</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'{'</span>) { + <span class='self'>self</span>.<span class='ident'>parse_hex_many_digits</span>() + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>parse_hex_two_digits</span>() + } + } + + <span class='comment'>// Parses a many-digit hex number, e.g., `a\x{2603}b`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `2`</span> + <span class='comment'>// End: `b`</span> + <span class='kw'>fn</span> <span class='ident'>parse_hex_many_digits</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>char</span>; + + <span class='kw'>let</span> <span class='ident'>s</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>bump_get</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>'}'</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>.<span class='ident'>into</span>()); + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>u32</span>::<span class='ident'>from_str_radix</span>(<span class='kw-2'>&</span><span class='ident'>s</span>, <span class='number'>16</span>) + .<span class='ident'>map_err</span>(<span class='op'>|</span>_<span class='op'>|</span> <span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='ident'>s</span>)))); + <span class='kw'>let</span> <span class='ident'>c</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>char</span>::<span class='ident'>from_u32</span>(<span class='ident'>n</span>) + .<span class='ident'>ok_or</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidScalarValue</span>(<span class='ident'>n</span>)))); + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'}'</span>) { + <span class='comment'>// e.g., a\x{d</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedHex</span>)); + } + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { + <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>c</span>], + <span class='ident'>casei</span>: <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span>, + })) + } + + <span class='comment'>// Parses a two-digit hex number, e.g., `a\x5ab`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `5`</span> + <span class='comment'>// End: `b`</span> + <span class='kw'>fn</span> <span class='ident'>parse_hex_two_digits</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>char</span>; + + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>i</span> <span class='op'>=</span> <span class='number'>0</span>; + <span class='kw'>let</span> <span class='ident'>s</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>bump_get</span>(<span class='op'>|</span>_<span class='op'>|</span> { <span class='ident'>i</span> <span class='op'>+=</span> <span class='number'>1</span>; <span class='ident'>i</span> <span class='op'><=</span> <span class='number'>2</span> }).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>.<span class='ident'>into</span>()); + <span class='kw'>if</span> <span class='ident'>s</span>.<span class='ident'>len</span>() <span class='op'><</span> <span class='number'>2</span> { + <span class='comment'>// e.g., a\x</span> + <span class='comment'>// e.g., a\xf</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedTwoDigitHexEof</span>)); + } + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>u32</span>::<span class='ident'>from_str_radix</span>(<span class='kw-2'>&</span><span class='ident'>s</span>, <span class='number'>16</span>) + .<span class='ident'>map_err</span>(<span class='op'>|</span>_<span class='op'>|</span> <span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='ident'>s</span>)))); + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { + <span class='comment'>// Because 0...255 are all valid Unicode scalar values.</span> + <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>char</span>::<span class='ident'>from_u32</span>(<span class='ident'>n</span>).<span class='ident'>expect</span>(<span class='string'>"Unicode scalar value"</span>)], + <span class='ident'>casei</span>: <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span>, + })) + } + + <span class='comment'>// Parses a character class, e.g., `[^a-zA-Z0-9]+`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `[`</span> + <span class='comment'>// End: `+`</span> + <span class='kw'>fn</span> <span class='ident'>parse_class</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='kw'>let</span> <span class='ident'>negated</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'^'</span>); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>class</span> <span class='op'>=</span> <span class='ident'>CharClass</span>::<span class='ident'>empty</span>(); + <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'-'</span>) { + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>push</span>(<span class='ident'>ClassRange</span>::<span class='ident'>one</span>(<span class='string'>'-'</span>)); + } + <span class='kw'>loop</span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='comment'>// e.g., [a</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>)); + } + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>cur</span>() { + <span class='comment'>// If no ranges have been added, then `]` is the first</span> + <span class='comment'>// character (sans, perhaps, the `^` symbol), so it should</span> + <span class='comment'>// be interpreted as a `]` instead of a closing class bracket.</span> + <span class='string'>']'</span> <span class='kw'>if</span> <span class='ident'>class</span>.<span class='ident'>len</span>() <span class='op'>></span> <span class='number'>0</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>bump</span>(); <span class='kw'>break</span> } + <span class='string'>'['</span> <span class='op'>=></span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>maybe_parse_ascii</span>() { + <span class='prelude-val'>Some</span>(<span class='ident'>class2</span>) <span class='op'>=></span> <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>extend</span>(<span class='ident'>class2</span>), + <span class='prelude-val'>None</span> <span class='op'>=></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_class_range</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>class</span>, <span class='string'>'['</span>)) + } + }, + <span class='string'>'\\'</span> <span class='op'>=></span> <span class='kw'>match</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_escape</span>()) { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class2</span>)) <span class='op'>=></span> { + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>extend</span>(<span class='ident'>class2</span>); + } + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>, .. }) <span class='op'>=></span> { + <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_class_range</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>class</span>, <span class='ident'>chars</span>[<span class='number'>0</span>])); + } + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>) <span class='op'>=></span> { + <span class='kw'>let</span> <span class='ident'>err</span> <span class='op'>=</span> <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>e</span>); + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>err</span>)); + } + <span class='comment'>// Because `parse_escape` can never return `LeftParen`.</span> + _ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + }, + <span class='ident'>start</span> <span class='op'>=></span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_class_range</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>class</span>, <span class='ident'>start</span>)); + } + } + } + <span class='kw'>if</span> <span class='ident'>negated</span> { + <span class='ident'>class</span> <span class='op'>=</span> <span class='ident'>class</span>.<span class='ident'>negate</span>(); + } + <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>.<span class='ident'>canonicalize</span>()))) + } + + <span class='comment'>// Parses a single range in a character class.</span> + <span class='comment'>//</span> + <span class='comment'>// Since this is a helper for `parse_class`, its signature sticks out.</span> + <span class='comment'>// Namely, it requires the start character of the range and the char</span> + <span class='comment'>// class to mutate.</span> + <span class='comment'>//</span> + <span class='comment'>// e.g., `[a-z]`</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `-` (with start == `a`)</span> + <span class='comment'>// End: `]`</span> + <span class='kw'>fn</span> <span class='ident'>parse_class_range</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>class</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>CharClass</span>, <span class='ident'>start</span>: <span class='ident'>char</span>) + <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>()<span class='op'>></span> { + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'-'</span>) { + <span class='comment'>// Not a range, so just push a singleton range.</span> + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>push</span>(<span class='ident'>ClassRange</span>::<span class='ident'>one</span>(<span class='ident'>start</span>)); + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(()); + } + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='comment'>// e.g., [a-</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>)); + } + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>peek_is</span>(<span class='string'>']'</span>) { + <span class='comment'>// This is the end of the class, so we permit use of `-` as a</span> + <span class='comment'>// regular char (just like we do in the beginning).</span> + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>push</span>(<span class='ident'>ClassRange</span>::<span class='ident'>one</span>(<span class='ident'>start</span>)); + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>push</span>(<span class='ident'>ClassRange</span>::<span class='ident'>one</span>(<span class='string'>'-'</span>)); + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(()); + } + + <span class='comment'>// We have a real range. Just need to check to parse literal and</span> + <span class='comment'>// make sure it's a valid range.</span> + <span class='kw'>let</span> <span class='ident'>end</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>cur</span>() { + <span class='string'>'\\'</span> <span class='op'>=></span> <span class='kw'>match</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>parse_escape</span>()) { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>, .. }) <span class='op'>=></span> <span class='ident'>chars</span>[<span class='number'>0</span>], + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>) <span class='op'>=></span> { + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>e</span>))); + } + <span class='comment'>// Because `parse_escape` can never return `LeftParen`.</span> + _ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + }, + _ <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>bump</span>(), + }; + <span class='kw'>if</span> <span class='ident'>end</span> <span class='op'><</span> <span class='ident'>start</span> { + <span class='comment'>// e.g., [z-a]</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassRange</span> { + <span class='ident'>start</span>: <span class='ident'>start</span>, + <span class='ident'>end</span>: <span class='ident'>end</span>, + })); + } + <span class='ident'>class</span>.<span class='ident'>ranges</span>.<span class='ident'>push</span>(<span class='ident'>ClassRange</span>::<span class='ident'>new</span>(<span class='ident'>start</span>, <span class='ident'>end</span>)); + <span class='prelude-val'>Ok</span>(()) + } + + <span class='comment'>// Parses an ASCII class, e.g., `[:alnum:]+`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `[`</span> + <span class='comment'>// End: `+`</span> + <span class='comment'>//</span> + <span class='comment'>// Also supports negation, e.g., `[:^alnum:]`.</span> + <span class='comment'>//</span> + <span class='comment'>// This parsing routine is distinct from the others in that it doesn't</span> + <span class='comment'>// actually report any errors. Namely, if it fails, then the parser should</span> + <span class='comment'>// fall back to parsing a regular class.</span> + <span class='comment'>//</span> + <span class='comment'>// This method will only make progress in the parser if it succeeds.</span> + <span class='comment'>// Otherwise, the input remains where it started.</span> + <span class='kw'>fn</span> <span class='ident'>maybe_parse_ascii</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>CharClass</span><span class='op'>></span> { + <span class='kw'>fn</span> <span class='ident'>parse</span>(<span class='ident'>p</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>Parser</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>CharClass</span><span class='op'>></span> { + <span class='ident'>p</span>.<span class='ident'>bump</span>(); <span class='comment'>// the `[`</span> + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>p</span>.<span class='ident'>bump_if</span>(<span class='string'>':'</span>) { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } + <span class='kw'>let</span> <span class='ident'>negate</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>bump_if</span>(<span class='string'>'^'</span>); + <span class='kw'>let</span> <span class='ident'>name</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>p</span>.<span class='ident'>bump_get</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>':'</span>) { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>None</span>, + <span class='prelude-val'>Some</span>(<span class='ident'>name</span>) <span class='op'>=></span> <span class='ident'>name</span>, + }; + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>p</span>.<span class='ident'>bump_if</span>(<span class='string'>":]"</span>) { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } + <span class='ident'>ascii_class</span>(<span class='kw-2'>&</span><span class='ident'>name</span>).<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>negate</span> { <span class='ident'>c</span> } <span class='kw'>else</span> { <span class='ident'>c</span>.<span class='ident'>negate</span>() }) + } + <span class='kw'>let</span> <span class='ident'>start</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>chari</span>; + <span class='kw'>match</span> <span class='ident'>parse</span>(<span class='self'>self</span>) { + <span class='prelude-val'>None</span> <span class='op'>=></span> { <span class='self'>self</span>.<span class='ident'>chari</span> <span class='op'>=</span> <span class='ident'>start</span>; <span class='prelude-val'>None</span> } + <span class='ident'>result</span> <span class='op'>=></span> <span class='ident'>result</span>, + } + } + + <span class='comment'>// Parses a Uncode class name, e.g., `a\pLb`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `L`</span> + <span class='comment'>// End: `b`</span> + <span class='comment'>//</span> + <span class='comment'>// And also, `a\p{Greek}b`.</span> + <span class='comment'>//</span> + <span class='comment'>// Start: `{`</span> + <span class='comment'>// End: `b`</span> + <span class='comment'>//</span> + <span class='comment'>// `negate` is true when the class name is used with `\P`.</span> + <span class='kw'>fn</span> <span class='ident'>parse_unicode_class</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>neg</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>CharClass</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>name</span> <span class='op'>=</span> + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'{'</span>) { + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>bump_get</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>!=</span> <span class='string'>'}'</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>.<span class='ident'>into</span>()); + <span class='kw'>if</span> <span class='ident'>n</span>.<span class='ident'>is_empty</span>() <span class='op'>||</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>bump_if</span>(<span class='string'>'}'</span>) { + <span class='comment'>// e.g., \p{Greek</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedUnicodeName</span>)); + } + <span class='ident'>n</span> + } <span class='kw'>else</span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>eof</span>() { + <span class='comment'>// e.g., \p</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedEscapeEof</span>)); + } + <span class='self'>self</span>.<span class='ident'>bump</span>().<span class='ident'>to_string</span>() + }; + <span class='kw'>match</span> <span class='ident'>unicode_class</span>(<span class='kw-2'>&</span><span class='ident'>name</span>) { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedUnicodeClass</span>(<span class='ident'>name</span>))), + <span class='prelude-val'>Some</span>(<span class='ident'>cls</span>) <span class='op'>=></span> <span class='kw'>if</span> <span class='ident'>neg</span> { <span class='prelude-val'>Ok</span>(<span class='ident'>cls</span>.<span class='ident'>negate</span>()) } <span class='kw'>else</span> { <span class='prelude-val'>Ok</span>(<span class='ident'>cls</span>) }, + } + } + + <span class='comment'>// Parses a perl character class with Unicode support.</span> + <span class='comment'>//</span> + <span class='comment'>// `name` must be one of d, s, w, D, S, W. If not, this function panics.</span> + <span class='comment'>//</span> + <span class='comment'>// No parser state is changed.</span> + <span class='kw'>fn</span> <span class='ident'>parse_perl_class</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>name</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>CharClass</span> { + <span class='kw'>use</span> <span class='ident'>unicode</span>::<span class='ident'>regex</span>::{<span class='ident'>PERLD</span>, <span class='ident'>PERLS</span>, <span class='ident'>PERLW</span>}; + <span class='kw'>match</span> <span class='ident'>name</span> { + <span class='string'>'d'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLD</span>), + <span class='string'>'D'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>(), + <span class='string'>'s'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLS</span>), + <span class='string'>'S'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLS</span>).<span class='ident'>negate</span>(), + <span class='string'>'w'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLW</span>), + <span class='string'>'W'</span> <span class='op'>=></span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>PERLW</span>).<span class='ident'>negate</span>(), + _ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + } + } + + <span class='comment'>// Always bump to the next input and return the given expression as a</span> + <span class='comment'>// `Build`.</span> + <span class='comment'>//</span> + <span class='comment'>// This is mostly for convenience when the surrounding context implies</span> + <span class='comment'>// that the next character corresponds to the given expression.</span> + <span class='kw'>fn</span> <span class='ident'>parse_one</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>e</span>: <span class='ident'>Expr</span>) <span class='op'>-></span> <span class='ident'>Build</span> { + <span class='self'>self</span>.<span class='ident'>bump</span>(); + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>) + } +} + +<span class='comment'>// Auxiliary helper methods.</span> +<span class='kw'>impl</span> <span class='ident'>Parser</span> { + <span class='kw'>fn</span> <span class='ident'>chars</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Chars</span> { + <span class='ident'>Chars</span>::<span class='ident'>new</span>(<span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>chars</span>[<span class='self'>self</span>.<span class='ident'>chari</span>..], <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>ignore_space</span>) + } + + <span class='kw'>fn</span> <span class='ident'>bump</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>char</span> { + <span class='kw'>let</span> <span class='ident'>c</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>cur</span>(); + <span class='self'>self</span>.<span class='ident'>chari</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>chari</span>, <span class='self'>self</span>.<span class='ident'>chars</span>().<span class='ident'>next_count</span>()); + <span class='ident'>c</span> + } + + <span class='kw'>fn</span> <span class='ident'>cur</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>char</span> { <span class='self'>self</span>.<span class='ident'>chars</span>().<span class='ident'>next</span>().<span class='ident'>unwrap</span>() } + + <span class='kw'>fn</span> <span class='ident'>eof</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>chars</span>().<span class='ident'>next</span>().<span class='ident'>is_none</span>() } + + <span class='kw'>fn</span> <span class='ident'>bump_get</span><span class='op'><</span><span class='ident'>B</span>: <span class='ident'>Bumpable</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>s</span>: <span class='ident'>B</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>String</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>s</span>.<span class='ident'>match_end</span>(<span class='self'>self</span>); + <span class='kw'>if</span> <span class='ident'>n</span> <span class='op'>==</span> <span class='number'>0</span> { + <span class='prelude-val'>None</span> + } <span class='kw'>else</span> { + <span class='kw'>let</span> <span class='ident'>end</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>chari</span>, <span class='ident'>n</span>); + <span class='kw'>let</span> <span class='ident'>s</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>chars</span>[<span class='self'>self</span>.<span class='ident'>chari</span>..<span class='ident'>end</span>] + .<span class='ident'>iter</span>().<span class='ident'>cloned</span>().<span class='ident'>collect</span>::<span class='op'><</span><span class='ident'>String</span><span class='op'>></span>(); + <span class='self'>self</span>.<span class='ident'>chari</span> <span class='op'>=</span> <span class='ident'>end</span>; + <span class='prelude-val'>Some</span>(<span class='ident'>s</span>) + } + } + + <span class='kw'>fn</span> <span class='ident'>bump_if</span><span class='op'><</span><span class='ident'>B</span>: <span class='ident'>Bumpable</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>s</span>: <span class='ident'>B</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>s</span>.<span class='ident'>match_end</span>(<span class='self'>self</span>); + <span class='kw'>if</span> <span class='ident'>n</span> <span class='op'>==</span> <span class='number'>0</span> { + <span class='boolval'>false</span> + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>chari</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>chari</span>, <span class='ident'>n</span>); + <span class='boolval'>true</span> + } + } + + <span class='kw'>fn</span> <span class='ident'>peek_is</span><span class='op'><</span><span class='ident'>B</span>: <span class='ident'>Bumpable</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>s</span>: <span class='ident'>B</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='ident'>s</span>.<span class='ident'>match_end</span>(<span class='self'>self</span>) <span class='op'>></span> <span class='number'>0</span> + } + + <span class='kw'>fn</span> <span class='ident'>err</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>kind</span>: <span class='ident'>ErrorKind</span>) <span class='op'>-></span> <span class='ident'>Error</span> { + <span class='self'>self</span>.<span class='ident'>errat</span>(<span class='self'>self</span>.<span class='ident'>chari</span>, <span class='ident'>kind</span>) + } + + <span class='kw'>fn</span> <span class='ident'>errat</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>pos</span>: <span class='ident'>usize</span>, <span class='ident'>kind</span>: <span class='ident'>ErrorKind</span>) <span class='op'>-></span> <span class='ident'>Error</span> { + <span class='ident'>Error</span> { <span class='ident'>pos</span>: <span class='ident'>pos</span>, <span class='ident'>surround</span>: <span class='self'>self</span>.<span class='ident'>windowat</span>(<span class='ident'>pos</span>), <span class='ident'>kind</span>: <span class='ident'>kind</span> } + } + + <span class='kw'>fn</span> <span class='ident'>windowat</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>pos</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='kw'>let</span> <span class='ident'>s</span> <span class='op'>=</span> <span class='ident'>max</span>(<span class='number'>5</span>, <span class='ident'>pos</span>) <span class='op'>-</span> <span class='number'>5</span>; + <span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>min</span>(<span class='self'>self</span>.<span class='ident'>chars</span>.<span class='ident'>len</span>(), <span class='ident'>checkadd</span>(<span class='ident'>pos</span>, <span class='number'>5</span>)); + <span class='self'>self</span>.<span class='ident'>chars</span>[<span class='ident'>s</span>..<span class='ident'>e</span>].<span class='ident'>iter</span>().<span class='ident'>cloned</span>().<span class='ident'>collect</span>() + } + + <span class='kw'>fn</span> <span class='ident'>pop</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>expected</span>: <span class='ident'>ErrorKind</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Expr</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>pop</span>() { + <span class='prelude-val'>None</span> <span class='op'>|</span> <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span>{..}) <span class='op'>=></span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>expected</span>)), + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>)) <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='ident'>e</span>), + } + } + + <span class='comment'>// If the current contexts calls for case insensitivity and if the expr</span> + <span class='comment'>// given is a character class, do case folding on it and return the new</span> + <span class='comment'>// class.</span> + <span class='comment'>//</span> + <span class='comment'>// Otherwise, return the expression unchanged.</span> + <span class='kw'>fn</span> <span class='ident'>maybe_class_case_fold</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>bexpr</span>: <span class='ident'>Build</span>) <span class='op'>-></span> <span class='ident'>Build</span> { + <span class='kw'>match</span> <span class='ident'>bexpr</span> { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>)) <span class='op'>=></span> { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>( + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>flags</span>.<span class='ident'>casei</span> <span class='op'>&&</span> <span class='op'>!</span><span class='ident'>cls</span>.<span class='ident'>casei</span> { + <span class='ident'>cls</span>.<span class='ident'>case_fold</span>() + } <span class='kw'>else</span> { + <span class='ident'>cls</span> + } + )) + } + <span class='ident'>bexpr</span> <span class='op'>=></span> <span class='ident'>bexpr</span>, + } + } +} + +<span class='kw'>struct</span> <span class='ident'>Chars</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='ident'>chars</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> [<span class='ident'>char</span>], + <span class='ident'>cur</span>: <span class='ident'>usize</span>, + <span class='ident'>ignore_space</span>: <span class='ident'>bool</span>, + <span class='ident'>in_comment</span>: <span class='ident'>bool</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>Chars</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>char</span>; + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>char</span><span class='op'>></span> { + <span class='self'>self</span>.<span class='ident'>skip</span>(); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>chars</span>.<span class='ident'>len</span>() { + <span class='kw'>let</span> <span class='ident'>c</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>chars</span>[<span class='self'>self</span>.<span class='ident'>cur</span>]; + <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>cur</span>, <span class='number'>1</span>); + <span class='prelude-val'>Some</span>(<span class='ident'>c</span>) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>Chars</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>chars</span>: <span class='kw-2'>&</span>[<span class='ident'>char</span>], <span class='ident'>ignore_space</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='ident'>Chars</span> { + <span class='ident'>Chars</span> { + <span class='ident'>chars</span>: <span class='ident'>chars</span>, + <span class='ident'>cur</span>: <span class='number'>0</span>, + <span class='ident'>ignore_space</span>: <span class='ident'>ignore_space</span>, + <span class='ident'>in_comment</span>: <span class='boolval'>false</span>, + } + } + + <span class='doccomment'>/// Skip line comments and whitespace</span> + <span class='kw'>fn</span> <span class='ident'>skip</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) { + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>ignore_space</span> { <span class='kw'>return</span>; } + <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>chars</span>.<span class='ident'>len</span>() { + <span class='comment'>// Handle escaping of `#`, i.e. don't start a comment with `\#`.</span> + <span class='kw'>let</span> <span class='ident'>next_cur</span> <span class='op'>=</span> <span class='ident'>checkadd</span>(<span class='self'>self</span>.<span class='ident'>cur</span>, <span class='number'>1</span>); + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>&&</span> <span class='self'>self</span>.<span class='ident'>c</span>() <span class='op'>==</span> <span class='string'>'\\'</span> + <span class='op'>&&</span> <span class='ident'>next_cur</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>chars</span>.<span class='ident'>len</span>() + <span class='op'>&&</span> <span class='self'>self</span>.<span class='ident'>chars</span>[<span class='ident'>next_cur</span>] <span class='op'>==</span> <span class='string'>'#'</span> + { + <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>=</span> <span class='ident'>next_cur</span>; + <span class='kw'>break</span>; + } + + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>&&</span> <span class='self'>self</span>.<span class='ident'>c</span>() <span class='op'>==</span> <span class='string'>'#'</span> { + <span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>=</span> <span class='boolval'>true</span>; + } <span class='kw'>else</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>&&</span> <span class='self'>self</span>.<span class='ident'>c</span>() <span class='op'>==</span> <span class='string'>'\n'</span> { + <span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>=</span> <span class='boolval'>false</span>; + } + + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>in_comment</span> <span class='op'>||</span> <span class='self'>self</span>.<span class='ident'>c</span>().<span class='ident'>is_whitespace</span>() { + <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>=</span> <span class='ident'>next_cur</span>; + } <span class='kw'>else</span> { + <span class='kw'>break</span>; + } + } + } + + <span class='kw'>fn</span> <span class='ident'>c</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>char</span> { + <span class='self'>self</span>.<span class='ident'>chars</span>[<span class='self'>self</span>.<span class='ident'>cur</span>] + } + + <span class='kw'>fn</span> <span class='ident'>next_count</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='self'>self</span>.<span class='ident'>next</span>(); + <span class='self'>self</span>.<span class='ident'>cur</span> + } +} + +<span class='comment'>// Auxiliary methods for manipulating the expression stack.</span> +<span class='kw'>impl</span> <span class='ident'>Parser</span> { + <span class='comment'>// Called whenever an alternate (`|`) is found.</span> + <span class='comment'>//</span> + <span class='comment'>// This pops the expression stack until:</span> + <span class='comment'>//</span> + <span class='comment'>// 1. The stack is empty. Pushes an alternation with one arm.</span> + <span class='comment'>// 2. An opening parenthesis is found. Leave the parenthesis</span> + <span class='comment'>// on the stack and push an alternation with one arm.</span> + <span class='comment'>// 3. An alternate (`|`) is found. Pop the existing alternation,</span> + <span class='comment'>// add an arm and push the modified alternation.</span> + <span class='comment'>//</span> + <span class='comment'>// Each "arm" in the above corresponds to the concatenation of all</span> + <span class='comment'>// popped expressions.</span> + <span class='comment'>//</span> + <span class='comment'>// In the first two cases, the stack is left in an invalid state</span> + <span class='comment'>// because an alternation with one arm is not allowed. This</span> + <span class='comment'>// particular state will be detected by `finish_concat` and an</span> + <span class='comment'>// error will be reported.</span> + <span class='comment'>//</span> + <span class='comment'>// In none of the cases is an empty arm allowed. If an empty arm</span> + <span class='comment'>// is found, an error is reported.</span> + <span class='kw'>fn</span> <span class='ident'>alternate</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Build</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>concat</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[]; + <span class='kw'>let</span> <span class='ident'>alts</span> <span class='op'>=</span> <span class='op'>|</span><span class='ident'>es</span><span class='op'>|</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='ident'>es</span>))); + <span class='kw'>loop</span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>pop</span>() { + <span class='prelude-val'>None</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., |a</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>)); + } + <span class='kw'>return</span> <span class='ident'>alts</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)]); + } + <span class='prelude-val'>Some</span>(<span class='ident'>e</span> <span class='kw-2'>@</span> <span class='ident'>Build</span>::<span class='ident'>LeftParen</span>{..}) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., (|a)</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>)); + } + <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>push</span>(<span class='ident'>e</span>); + <span class='kw'>return</span> <span class='ident'>alts</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)]); + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='kw-2'>mut</span> <span class='ident'>es</span>))) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., a||</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>)); + } + <span class='ident'>es</span>.<span class='ident'>push</span>(<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)); + <span class='kw'>return</span> <span class='ident'>alts</span>(<span class='ident'>es</span>); + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>)) <span class='op'>=></span> { <span class='ident'>concat</span>.<span class='ident'>push</span>(<span class='ident'>e</span>); } + } + } + } + + <span class='comment'>// Called whenever a closing parenthesis (`)`) is found.</span> + <span class='comment'>//</span> + <span class='comment'>// This pops the expression stack until:</span> + <span class='comment'>//</span> + <span class='comment'>// 1. The stack is empty. An error is reported because this</span> + <span class='comment'>// indicates an unopened parenthesis.</span> + <span class='comment'>// 2. An opening parenthesis is found. Pop the opening parenthesis</span> + <span class='comment'>// and push a `Group` expression.</span> + <span class='comment'>// 3. An alternate (`|`) is found. Pop the existing alternation</span> + <span class='comment'>// and an arm to it in place. Pop one more item from the stack.</span> + <span class='comment'>// If the stack was empty, then report an unopened parenthesis</span> + <span class='comment'>// error, otherwise assume it is an opening parenthesis and</span> + <span class='comment'>// push a `Group` expression with the popped alternation.</span> + <span class='comment'>// (We can assume this is an opening parenthesis because an</span> + <span class='comment'>// alternation either corresponds to the entire Regex or it</span> + <span class='comment'>// corresponds to an entire group. This is guaranteed by the</span> + <span class='comment'>// `alternate` method.)</span> + <span class='comment'>//</span> + <span class='comment'>// Each "arm" in the above corresponds to the concatenation of all</span> + <span class='comment'>// popped expressions.</span> + <span class='comment'>//</span> + <span class='comment'>// Empty arms nor empty groups are allowed.</span> + <span class='kw'>fn</span> <span class='ident'>close_paren</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(<span class='ident'>Flags</span>, <span class='ident'>Build</span>)<span class='op'>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>concat</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[]; + <span class='kw'>loop</span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>pop</span>() { + <span class='comment'>// e.g., )</span> + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnopenedParen</span>)), + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span> { <span class='ident'>i</span>, <span class='ident'>name</span>, <span class='ident'>old_flags</span>, .. }) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., ()</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyGroup</span>)); + } + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>((<span class='ident'>old_flags</span>, <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)), + <span class='ident'>i</span>: <span class='ident'>i</span>, + <span class='ident'>name</span>: <span class='ident'>name</span>, + }))); + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='kw-2'>mut</span> <span class='ident'>es</span>))) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., (a|)</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>)); + } + <span class='ident'>es</span>.<span class='ident'>push</span>(<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)); + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>pop</span>() { + <span class='comment'>// e.g., a|b)</span> + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>UnopenedParen</span>)), + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(_)) <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span> { <span class='ident'>i</span>, <span class='ident'>name</span>, <span class='ident'>old_flags</span>, .. }) <span class='op'>=></span> { + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>((<span class='ident'>old_flags</span>, <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='ident'>es</span>)), + <span class='ident'>i</span>: <span class='ident'>i</span>, + <span class='ident'>name</span>: <span class='ident'>name</span>, + }))); + } + } + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>)) <span class='op'>=></span> { <span class='ident'>concat</span>.<span class='ident'>push</span>(<span class='ident'>e</span>); } + } + } + } + + <span class='comment'>// Called only when the parser reaches the end of input.</span> + <span class='comment'>//</span> + <span class='comment'>// This pops the expression stack until:</span> + <span class='comment'>//</span> + <span class='comment'>// 1. The stack is empty. Return concatenation of popped</span> + <span class='comment'>// expressions. This concatenation may be empty!</span> + <span class='comment'>// 2. An alternation is found. Pop the alternation and push</span> + <span class='comment'>// a new arm. Return the alternation as the entire Regex.</span> + <span class='comment'>//</span> + <span class='comment'>// If an opening parenthesis is popped, then an error is</span> + <span class='comment'>// returned since it indicates an unclosed parenthesis.</span> + <span class='kw'>fn</span> <span class='ident'>finish_concat</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Expr</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>concat</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[]; + <span class='kw'>loop</span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>stack</span>.<span class='ident'>pop</span>() { + <span class='prelude-val'>None</span> <span class='op'>=></span> { <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)); } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>LeftParen</span>{ <span class='ident'>chari</span>, ..}) <span class='op'>=></span> { + <span class='comment'>// e.g., a(b</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>errat</span>(<span class='ident'>chari</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedParen</span>)); + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='kw-2'>mut</span> <span class='ident'>es</span>))) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>concat</span>.<span class='ident'>is_empty</span>() { + <span class='comment'>// e.g., a|</span> + <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='self'>self</span>.<span class='ident'>err</span>(<span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>)); + } + <span class='ident'>es</span>.<span class='ident'>push</span>(<span class='ident'>rev_concat</span>(<span class='ident'>concat</span>)); + <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='ident'>es</span>)); + } + <span class='prelude-val'>Some</span>(<span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>e</span>)) <span class='op'>=></span> { <span class='ident'>concat</span>.<span class='ident'>push</span>(<span class='ident'>e</span>); } + } + } + } +} + +<span class='kw'>impl</span> <span class='ident'>Build</span> { + <span class='kw'>fn</span> <span class='ident'>is_empty</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Build</span>::<span class='ident'>Expr</span>(<span class='ident'>Expr</span>::<span class='ident'>Empty</span>) <span class='op'>=></span> <span class='boolval'>true</span>, + _ <span class='op'>=></span> <span class='boolval'>false</span>, + } + } +} + +<span class='comment'>// Make it ergonomic to conditionally bump the parser.</span> +<span class='comment'>// i.e., `bump_if('a')` or `bump_if("abc")`.</span> +<span class='kw'>trait</span> <span class='ident'>Bumpable</span> { + <span class='kw'>fn</span> <span class='ident'>match_end</span>(<span class='self'>self</span>, <span class='ident'>p</span>: <span class='kw-2'>&</span><span class='ident'>Parser</span>) <span class='op'>-></span> <span class='ident'>usize</span>; +} + +<span class='kw'>impl</span> <span class='ident'>Bumpable</span> <span class='kw'>for</span> <span class='ident'>char</span> { + <span class='kw'>fn</span> <span class='ident'>match_end</span>(<span class='self'>self</span>, <span class='ident'>p</span>: <span class='kw-2'>&</span><span class='ident'>Parser</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>chars</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>chars</span>(); + <span class='kw'>if</span> <span class='ident'>chars</span>.<span class='ident'>next</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>c</span><span class='op'>|</span> <span class='ident'>c</span> <span class='op'>==</span> <span class='self'>self</span>).<span class='ident'>unwrap_or</span>(<span class='boolval'>false</span>) { + <span class='ident'>chars</span>.<span class='ident'>cur</span> + } <span class='kw'>else</span> { + <span class='number'>0</span> + } + } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>Bumpable</span> <span class='kw'>for</span> <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span> { + <span class='kw'>fn</span> <span class='ident'>match_end</span>(<span class='self'>self</span>, <span class='ident'>p</span>: <span class='kw-2'>&</span><span class='ident'>Parser</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>search</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>chars</span>(); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rest</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>chars</span>(); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>count</span> <span class='op'>=</span> <span class='number'>0</span>; + <span class='kw'>loop</span> { + <span class='kw'>match</span> (<span class='ident'>rest</span>.<span class='ident'>next</span>(), <span class='ident'>search</span>.<span class='ident'>next</span>()) { + (<span class='prelude-val'>Some</span>(<span class='ident'>c1</span>), <span class='prelude-val'>Some</span>(<span class='ident'>c2</span>)) <span class='kw'>if</span> <span class='ident'>c1</span> <span class='op'>==</span> <span class='ident'>c2</span> <span class='op'>=></span> <span class='ident'>count</span> <span class='op'>=</span> <span class='ident'>rest</span>.<span class='ident'>cur</span>, + (_, <span class='prelude-val'>None</span>) <span class='op'>=></span> <span class='kw'>return</span> <span class='ident'>count</span>, + _ <span class='op'>=></span> <span class='kw'>return</span> <span class='number'>0</span>, + } + } + } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='ident'>F</span>: <span class='ident'>FnMut</span>(<span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>bool</span><span class='op'>></span> <span class='ident'>Bumpable</span> <span class='kw'>for</span> <span class='ident'>F</span> { + <span class='kw'>fn</span> <span class='ident'>match_end</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>p</span>: <span class='kw-2'>&</span><span class='ident'>Parser</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>chars</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>chars</span>(); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>count</span> <span class='op'>=</span> <span class='number'>0</span>; + <span class='kw'>while</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>c</span>) <span class='op'>=</span> <span class='ident'>chars</span>.<span class='ident'>next</span>() { + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>(<span class='ident'>c</span>) { + <span class='kw'>break</span> + } + <span class='ident'>count</span> <span class='op'>=</span> <span class='ident'>chars</span>.<span class='ident'>cur</span>; + } + <span class='ident'>count</span> + } +} + +<span class='comment'>// Turn a sequence of expressions into a concatenation.</span> +<span class='comment'>// This only uses `Concat` if there are 2 or more expressions.</span> +<span class='kw'>fn</span> <span class='ident'>rev_concat</span>(<span class='kw-2'>mut</span> <span class='ident'>exprs</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>Expr</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>Expr</span> { + <span class='kw'>if</span> <span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> { + <span class='ident'>Expr</span>::<span class='ident'>Empty</span> + } <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>1</span> { + <span class='ident'>exprs</span>.<span class='ident'>pop</span>().<span class='ident'>unwrap</span>() + } <span class='kw'>else</span> { + <span class='ident'>exprs</span>.<span class='ident'>reverse</span>(); + <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='ident'>exprs</span>) + } +} + +<span class='comment'>// Returns true if and only if the given character is allowed in a capture</span> +<span class='comment'>// name. Note that the first char of a capture name must not be numeric.</span> +<span class='kw'>fn</span> <span class='ident'>is_valid_capture_char</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='ident'>c</span> <span class='op'>==</span> <span class='string'>'_'</span> <span class='op'>||</span> (<span class='ident'>c</span> <span class='op'>>=</span> <span class='string'>'0'</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'><=</span> <span class='string'>'9'</span>) + <span class='op'>||</span> (<span class='ident'>c</span> <span class='op'>>=</span> <span class='string'>'a'</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'><=</span> <span class='string'>'z'</span>) <span class='op'>||</span> (<span class='ident'>c</span> <span class='op'>>=</span> <span class='string'>'A'</span> <span class='op'>&&</span> <span class='ident'>c</span> <span class='op'><=</span> <span class='string'>'Z'</span>) +} + +<span class='doccomment'>/// Returns true if the give character has significance in a regex.</span> +<span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_punct</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='kw'>match</span> <span class='ident'>c</span> { + <span class='string'>'\\'</span> <span class='op'>|</span> <span class='string'>'.'</span> <span class='op'>|</span> <span class='string'>'+'</span> <span class='op'>|</span> <span class='string'>'*'</span> <span class='op'>|</span> <span class='string'>'?'</span> <span class='op'>|</span> <span class='string'>'('</span> <span class='op'>|</span> <span class='string'>')'</span> <span class='op'>|</span> <span class='string'>'|'</span> <span class='op'>|</span> + <span class='string'>'['</span> <span class='op'>|</span> <span class='string'>']'</span> <span class='op'>|</span> <span class='string'>'{'</span> <span class='op'>|</span> <span class='string'>'}'</span> <span class='op'>|</span> <span class='string'>'^'</span> <span class='op'>|</span> <span class='string'>'$'</span> <span class='op'>|</span> <span class='string'>'#'</span> <span class='op'>=></span> <span class='boolval'>true</span>, + _ <span class='op'>=></span> <span class='boolval'>false</span>, + } +} + +<span class='kw'>fn</span> <span class='ident'>checkadd</span>(<span class='ident'>x</span>: <span class='ident'>usize</span>, <span class='ident'>y</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='ident'>x</span>.<span class='ident'>checked_add</span>(<span class='ident'>y</span>).<span class='ident'>expect</span>(<span class='string'>"regex length overflow"</span>) +} + +<span class='kw'>fn</span> <span class='ident'>unicode_class</span>(<span class='ident'>name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>CharClass</span><span class='op'>></span> { + <span class='ident'>UNICODE_CLASSES</span>.<span class='ident'>binary_search_by</span>(<span class='op'>|</span><span class='kw-2'>&</span>(<span class='ident'>s</span>, _)<span class='op'>|</span> <span class='ident'>s</span>.<span class='ident'>cmp</span>(<span class='ident'>name</span>)).<span class='ident'>ok</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>i</span><span class='op'>|</span> { + <span class='ident'>raw_class_to_expr</span>(<span class='ident'>UNICODE_CLASSES</span>[<span class='ident'>i</span>].<span class='number'>1</span>) + }) +} + +<span class='kw'>fn</span> <span class='ident'>ascii_class</span>(<span class='ident'>name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>CharClass</span><span class='op'>></span> { + <span class='ident'>ASCII_CLASSES</span>.<span class='ident'>binary_search_by</span>(<span class='op'>|</span><span class='kw-2'>&</span>(<span class='ident'>s</span>, _)<span class='op'>|</span> <span class='ident'>s</span>.<span class='ident'>cmp</span>(<span class='ident'>name</span>)).<span class='ident'>ok</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>i</span><span class='op'>|</span> { + <span class='ident'>raw_class_to_expr</span>(<span class='ident'>ASCII_CLASSES</span>[<span class='ident'>i</span>].<span class='number'>1</span>) + }) +} + +<span class='kw'>fn</span> <span class='ident'>raw_class_to_expr</span>(<span class='ident'>raw</span>: <span class='kw-2'>&</span>[(<span class='ident'>char</span>, <span class='ident'>char</span>)]) <span class='op'>-></span> <span class='ident'>CharClass</span> { + <span class='kw'>let</span> <span class='ident'>range</span> <span class='op'>=</span> <span class='op'>|</span><span class='kw-2'>&</span>(<span class='ident'>s</span>, <span class='ident'>e</span>)<span class='op'>|</span> <span class='ident'>ClassRange</span> { <span class='ident'>start</span>: <span class='ident'>s</span>, <span class='ident'>end</span>: <span class='ident'>e</span> }; + <span class='ident'>CharClass</span>::<span class='ident'>new</span>(<span class='ident'>raw</span>.<span class='ident'>iter</span>().<span class='ident'>map</span>(<span class='ident'>range</span>).<span class='ident'>collect</span>()) +} + +<span class='kw'>type</span> <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='lifetime'>'static</span> [(<span class='ident'>char</span>, <span class='ident'>char</span>)]; +<span class='kw'>type</span> <span class='ident'>NamedClasses</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='lifetime'>'static</span> [(<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>, <span class='ident'>Class</span>)]; + +<span class='kw'>const</span> <span class='ident'>ASCII_CLASSES</span>: <span class='ident'>NamedClasses</span> <span class='op'>=</span> <span class='kw-2'>&</span>[ + <span class='comment'>// Classes must be in alphabetical order so that bsearch works.</span> + <span class='comment'>// [:alnum:] alphanumeric (== [0-9A-Za-z])</span> + <span class='comment'>// [:alpha:] alphabetic (== [A-Za-z])</span> + <span class='comment'>// [:ascii:] ASCII (== [\x00-\x7F])</span> + <span class='comment'>// [:blank:] blank (== [\t ])</span> + <span class='comment'>// [:cntrl:] control (== [\x00-\x1F\x7F])</span> + <span class='comment'>// [:digit:] digits (== [0-9])</span> + <span class='comment'>// [:graph:] graphical (== [!-~])</span> + <span class='comment'>// [:lower:] lower case (== [a-z])</span> + <span class='comment'>// [:print:] printable (== [ -~] == [ [:graph:]])</span> + <span class='comment'>// [:punct:] punctuation (== [!-/:-@[-`{-~])</span> + <span class='comment'>// [:space:] whitespace (== [\t\n\v\f\r ])</span> + <span class='comment'>// [:upper:] upper case (== [A-Z])</span> + <span class='comment'>// [:word:] word characters (== [0-9A-Za-z_])</span> + <span class='comment'>// [:xdigit:] hex digit (== [0-9A-Fa-f])</span> + <span class='comment'>// Taken from: http://golang.org/pkg/regex/syntax/</span> + (<span class='string'>"alnum"</span>, <span class='kw-2'>&</span><span class='ident'>ALNUM</span>), + (<span class='string'>"alpha"</span>, <span class='kw-2'>&</span><span class='ident'>ALPHA</span>), + (<span class='string'>"ascii"</span>, <span class='kw-2'>&</span><span class='ident'>ASCII</span>), + (<span class='string'>"blank"</span>, <span class='kw-2'>&</span><span class='ident'>BLANK</span>), + (<span class='string'>"cntrl"</span>, <span class='kw-2'>&</span><span class='ident'>CNTRL</span>), + (<span class='string'>"digit"</span>, <span class='kw-2'>&</span><span class='ident'>DIGIT</span>), + (<span class='string'>"graph"</span>, <span class='kw-2'>&</span><span class='ident'>GRAPH</span>), + (<span class='string'>"lower"</span>, <span class='kw-2'>&</span><span class='ident'>LOWER</span>), + (<span class='string'>"print"</span>, <span class='kw-2'>&</span><span class='ident'>PRINT</span>), + (<span class='string'>"punct"</span>, <span class='kw-2'>&</span><span class='ident'>PUNCT</span>), + (<span class='string'>"space"</span>, <span class='kw-2'>&</span><span class='ident'>SPACE</span>), + (<span class='string'>"upper"</span>, <span class='kw-2'>&</span><span class='ident'>UPPER</span>), + (<span class='string'>"word"</span>, <span class='kw-2'>&</span><span class='ident'>WORD</span>), + (<span class='string'>"xdigit"</span>, <span class='kw-2'>&</span><span class='ident'>XDIGIT</span>), +]; + +<span class='kw'>const</span> <span class='ident'>ALNUM</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'0'</span>, <span class='string'>'9'</span>), (<span class='string'>'A'</span>, <span class='string'>'Z'</span>), (<span class='string'>'a'</span>, <span class='string'>'z'</span>)]; +<span class='kw'>const</span> <span class='ident'>ALPHA</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'A'</span>, <span class='string'>'Z'</span>), (<span class='string'>'a'</span>, <span class='string'>'z'</span>)]; +<span class='kw'>const</span> <span class='ident'>ASCII</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'\x00'</span>, <span class='string'>'\x7F'</span>)]; +<span class='kw'>const</span> <span class='ident'>BLANK</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>' '</span>, <span class='string'>' '</span>), (<span class='string'>'\t'</span>, <span class='string'>'\t'</span>)]; +<span class='kw'>const</span> <span class='ident'>CNTRL</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'\x00'</span>, <span class='string'>'\x1F'</span>), (<span class='string'>'\x7F'</span>, <span class='string'>'\x7F'</span>)]; +<span class='kw'>const</span> <span class='ident'>DIGIT</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'0'</span>, <span class='string'>'9'</span>)]; +<span class='kw'>const</span> <span class='ident'>GRAPH</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'!'</span>, <span class='string'>'~'</span>)]; +<span class='kw'>const</span> <span class='ident'>LOWER</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'z'</span>)]; +<span class='kw'>const</span> <span class='ident'>PRINT</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>' '</span>, <span class='string'>'~'</span>)]; +<span class='kw'>const</span> <span class='ident'>PUNCT</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'!'</span>, <span class='string'>'/'</span>), (<span class='string'>':'</span>, <span class='string'>'@'</span>), (<span class='string'>'['</span>, <span class='string'>'`'</span>), (<span class='string'>'{'</span>, <span class='string'>'~'</span>)]; +<span class='kw'>const</span> <span class='ident'>SPACE</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'\t'</span>, <span class='string'>'\t'</span>), (<span class='string'>'\n'</span>, <span class='string'>'\n'</span>), (<span class='string'>'\x0B'</span>, <span class='string'>'\x0B'</span>), + (<span class='string'>'\x0C'</span>, <span class='string'>'\x0C'</span>), (<span class='string'>'\r'</span>, <span class='string'>'\r'</span>), (<span class='string'>' '</span>, <span class='string'>' '</span>)]; +<span class='kw'>const</span> <span class='ident'>UPPER</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'A'</span>, <span class='string'>'Z'</span>)]; +<span class='kw'>const</span> <span class='ident'>WORD</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'0'</span>, <span class='string'>'9'</span>), (<span class='string'>'A'</span>, <span class='string'>'Z'</span>), (<span class='string'>'a'</span>, <span class='string'>'z'</span>), (<span class='string'>'_'</span>, <span class='string'>'_'</span>)]; +<span class='kw'>const</span> <span class='ident'>XDIGIT</span>: <span class='ident'>Class</span> <span class='op'>=</span> <span class='kw-2'>&</span>[(<span class='string'>'0'</span>, <span class='string'>'9'</span>), (<span class='string'>'A'</span>, <span class='string'>'F'</span>), (<span class='string'>'a'</span>, <span class='string'>'f'</span>)]; + +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> +<span class='kw'>mod</span> <span class='ident'>tests</span> { + <span class='kw'>use</span> { <span class='ident'>CharClass</span>, <span class='ident'>ClassRange</span>, <span class='ident'>Expr</span>, <span class='ident'>Repeater</span>, <span class='ident'>ErrorKind</span> }; + <span class='kw'>use</span> <span class='ident'>unicode</span>::<span class='ident'>regex</span>::{<span class='ident'>PERLD</span>, <span class='ident'>PERLS</span>, <span class='ident'>PERLW</span>}; + <span class='kw'>use</span> <span class='ident'>super</span>::<span class='ident'>Parser</span>; + <span class='kw'>use</span> <span class='ident'>super</span>::{<span class='ident'>LOWER</span>, <span class='ident'>UPPER</span>}; + + <span class='kw'>static</span> <span class='ident'>YI</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [(<span class='ident'>char</span>, <span class='ident'>char</span>)] <span class='op'>=</span> <span class='kw-2'>&</span>[ + (<span class='string'>'\u{a000}'</span>, <span class='string'>'\u{a48c}'</span>), (<span class='string'>'\u{a490}'</span>, <span class='string'>'\u{a4c6}'</span>), + ]; + + <span class='kw'>fn</span> <span class='ident'>p</span>(<span class='ident'>s</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>Expr</span> { <span class='ident'>Parser</span>::<span class='ident'>parse</span>(<span class='ident'>s</span>).<span class='ident'>unwrap</span>() } + <span class='kw'>fn</span> <span class='ident'>lit</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>Expr</span> { <span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>c</span>], <span class='ident'>casei</span>: <span class='boolval'>false</span> } } + <span class='kw'>fn</span> <span class='ident'>liti</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-></span> <span class='ident'>Expr</span> { <span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>c</span>], <span class='ident'>casei</span>: <span class='boolval'>true</span> } } + <span class='kw'>fn</span> <span class='ident'>b</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='ident'>v</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>Box</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> { <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>v</span>) } + <span class='kw'>fn</span> <span class='ident'>c</span>(<span class='ident'>es</span>: <span class='kw-2'>&</span>[<span class='ident'>Expr</span>]) <span class='op'>-></span> <span class='ident'>Expr</span> { <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='ident'>es</span>.<span class='ident'>to_vec</span>()) } + + <span class='kw'>fn</span> <span class='ident'>class</span>(<span class='ident'>ranges</span>: <span class='kw-2'>&</span>[(<span class='ident'>char</span>, <span class='ident'>char</span>)]) <span class='op'>-></span> <span class='ident'>CharClass</span> { + <span class='kw'>let</span> <span class='ident'>ranges</span> <span class='op'>=</span> <span class='ident'>ranges</span>.<span class='ident'>iter</span>().<span class='ident'>cloned</span>() + .<span class='ident'>map</span>(<span class='op'>|</span>(<span class='ident'>c1</span>, <span class='ident'>c2</span>)<span class='op'>|</span> <span class='ident'>ClassRange</span>::<span class='ident'>new</span>(<span class='ident'>c1</span>, <span class='ident'>c2</span>)).<span class='ident'>collect</span>(); + <span class='ident'>CharClass</span>::<span class='ident'>new</span>(<span class='ident'>ranges</span>) + } + + <span class='kw'>fn</span> <span class='ident'>classes</span>(<span class='ident'>classes</span>: <span class='kw-2'>&</span>[<span class='kw-2'>&</span>[(<span class='ident'>char</span>, <span class='ident'>char</span>)]]) <span class='op'>-></span> <span class='ident'>CharClass</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>cls</span> <span class='op'>=</span> <span class='ident'>CharClass</span>::<span class='ident'>empty</span>(); + <span class='kw'>for</span> <span class='kw-2'>&</span><span class='ident'>ranges</span> <span class='kw'>in</span> <span class='ident'>classes</span> { + <span class='ident'>cls</span>.<span class='ident'>ranges</span>.<span class='ident'>extend</span>(<span class='ident'>class</span>(<span class='ident'>ranges</span>)); + } + <span class='ident'>cls</span>.<span class='ident'>canonicalize</span>() + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>empty</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>""</span>), <span class='ident'>Expr</span>::<span class='ident'>Empty</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>literal</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a"</span>), <span class='ident'>lit</span>(<span class='string'>'a'</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>literal_string</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"ab"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>start_literal</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"^a"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>Expr</span>::<span class='ident'>StartText</span>, + <span class='ident'>Expr</span>::<span class='ident'>Literal</span> { <span class='ident'>chars</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='string'>'a'</span>], <span class='ident'>casei</span>: <span class='boolval'>false</span> }, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_zero_or_one_greedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrOne</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_zero_or_one_greedy_concat</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"ab?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), + <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'b'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrOne</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_zero_or_one_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a??"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrOne</span>, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_one_or_more_greedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a+"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>OneOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_one_or_more_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a+?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>OneOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_zero_or_more_greedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a*"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_zero_or_more_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a*?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_exact</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>5</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_min</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5,}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>None</span> }, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_min_max</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5,10}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>10</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_exact_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5}?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>5</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_min_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5,}?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>None</span> }, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_min_max_nongreedy</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{5,10}?"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>10</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>repeat_counted_whitespace</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{ 5 }"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>5</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a{ 5 , 10 }"</span>), <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>: <span class='number'>5</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='number'>10</span>) }, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_literal</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(a)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_literal_concat</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(ab)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_two</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a|b"</span>), <span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_many</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"a|b|c"</span>), <span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_many_concat</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"ab|bc|cd"</span>), <span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)]), + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>)]), + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'c'</span>), <span class='ident'>lit</span>(<span class='string'>'d'</span>)]), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_group_two</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(a|b)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_group_many</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(a|b|c)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>)])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_group_many_concat</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(ab|bc|cd)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)]), + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>)]), + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'c'</span>), <span class='ident'>lit</span>(<span class='string'>'d'</span>)]), + ])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>alt_group_nested</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(ab|(bc|(cd)))"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>)]), + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>)]), + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'c'</span>), <span class='ident'>lit</span>(<span class='string'>'d'</span>)])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>3</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + } + ])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>2</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + ])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_name</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?P<foo>a)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>Some</span>(<span class='string'>"foo"</span>.<span class='ident'>into</span>()), + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_no_capture</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?:a)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_flags</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i:a)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>liti</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_flags_returned</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i:a)a"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>liti</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + <span class='ident'>lit</span>(<span class='string'>'a'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>group_flags_retained</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)(?-i:a)a"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + <span class='ident'>liti</span>(<span class='string'>'a'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)a"</span>), <span class='ident'>liti</span>(<span class='string'>'a'</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline_multiple</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?is)a."</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>liti</span>(<span class='string'>'a'</span>), <span class='ident'>Expr</span>::<span class='ident'>AnyChar</span>])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline_multiline</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?m)^(?-m)$"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>Expr</span>::<span class='ident'>StartLine</span>, <span class='ident'>Expr</span>::<span class='ident'>EndText</span>])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline_swap_greed</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?U)a*a*?(?i-U)a*a*?"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }, + <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }, + <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>liti</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + }, + <span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>liti</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>false</span>, + }, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline_multiple_negate_one</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?is)a.(?i-s)a."</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>liti</span>(<span class='string'>'a'</span>), <span class='ident'>Expr</span>::<span class='ident'>AnyChar</span>, <span class='ident'>liti</span>(<span class='string'>'a'</span>), <span class='ident'>Expr</span>::<span class='ident'>AnyCharNoNL</span>, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_inline_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)a(?-i)a"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>liti</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'a'</span>)])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_group_inline</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(a(?i)a)a"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>liti</span>(<span class='string'>'a'</span>)])), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + <span class='ident'>lit</span>(<span class='string'>'a'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>flags_group_inline_retain</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)((?-i)a)a"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + <span class='ident'>liti</span>(<span class='string'>'a'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_simple</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\a\f\t\n\r\v"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>lit</span>(<span class='string'>'\x07'</span>), <span class='ident'>lit</span>(<span class='string'>'\x0C'</span>), <span class='ident'>lit</span>(<span class='string'>'\t'</span>), + <span class='ident'>lit</span>(<span class='string'>'\n'</span>), <span class='ident'>lit</span>(<span class='string'>'\r'</span>), <span class='ident'>lit</span>(<span class='string'>'\x0B'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_boundaries</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\A\z\b\B"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>Expr</span>::<span class='ident'>StartText</span>, <span class='ident'>Expr</span>::<span class='ident'>EndText</span>, + <span class='ident'>Expr</span>::<span class='ident'>WordBoundary</span>, <span class='ident'>Expr</span>::<span class='ident'>NotWordBoundary</span>, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_punctuation</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\\\.\+\*\?\(\)\|\[\]\{\}\^\$\#"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>lit</span>(<span class='string'>'\\'</span>), <span class='ident'>lit</span>(<span class='string'>'.'</span>), <span class='ident'>lit</span>(<span class='string'>'+'</span>), <span class='ident'>lit</span>(<span class='string'>'*'</span>), <span class='ident'>lit</span>(<span class='string'>'?'</span>), + <span class='ident'>lit</span>(<span class='string'>'('</span>), <span class='ident'>lit</span>(<span class='string'>')'</span>), <span class='ident'>lit</span>(<span class='string'>'|'</span>), <span class='ident'>lit</span>(<span class='string'>'['</span>), <span class='ident'>lit</span>(<span class='string'>']'</span>), + <span class='ident'>lit</span>(<span class='string'>'{'</span>), <span class='ident'>lit</span>(<span class='string'>'}'</span>), <span class='ident'>lit</span>(<span class='string'>'^'</span>), <span class='ident'>lit</span>(<span class='string'>'$'</span>), <span class='ident'>lit</span>(<span class='string'>'#'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_octal</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\123"</span>), <span class='ident'>lit</span>(<span class='string'>'S'</span>)); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\1234"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'S'</span>), <span class='ident'>lit</span>(<span class='string'>'4'</span>)])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_hex2</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\x53"</span>), <span class='ident'>lit</span>(<span class='string'>'S'</span>)); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\x534"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'S'</span>), <span class='ident'>lit</span>(<span class='string'>'4'</span>)])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_hex</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\x{53}"</span>), <span class='ident'>lit</span>(<span class='string'>'S'</span>)); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\x{53}4"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[<span class='ident'>lit</span>(<span class='string'>'S'</span>), <span class='ident'>lit</span>(<span class='string'>'4'</span>)])); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\x{2603}"</span>), <span class='ident'>lit</span>(<span class='string'>'\u{2603}'</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_name</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\p{Yi}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_letter</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\pZ"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\u{20}'</span>, <span class='string'>'\u{20}'</span>), (<span class='string'>'\u{a0}'</span>, <span class='string'>'\u{a0}'</span>), + (<span class='string'>'\u{1680}'</span>, <span class='string'>'\u{1680}'</span>), (<span class='string'>'\u{2000}'</span>, <span class='string'>'\u{200a}'</span>), + (<span class='string'>'\u{2028}'</span>, <span class='string'>'\u{2029}'</span>), (<span class='string'>'\u{202f}'</span>, <span class='string'>'\u{202f}'</span>), + (<span class='string'>'\u{205f}'</span>, <span class='string'>'\u{205f}'</span>), (<span class='string'>'\u{3000}'</span>, <span class='string'>'\u{3000}'</span>), + ]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_name_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\p{Yi}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_letter_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\pZ"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\u{20}'</span>, <span class='string'>'\u{20}'</span>), (<span class='string'>'\u{a0}'</span>, <span class='string'>'\u{a0}'</span>), + (<span class='string'>'\u{1680}'</span>, <span class='string'>'\u{1680}'</span>), (<span class='string'>'\u{2000}'</span>, <span class='string'>'\u{200a}'</span>), + (<span class='string'>'\u{2028}'</span>, <span class='string'>'\u{2029}'</span>), (<span class='string'>'\u{202f}'</span>, <span class='string'>'\u{202f}'</span>), + (<span class='string'>'\u{205f}'</span>, <span class='string'>'\u{205f}'</span>), (<span class='string'>'\u{3000}'</span>, <span class='string'>'\u{3000}'</span>), + ]).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_name_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\P{Yi}"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_letter_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\PZ"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\u{20}'</span>, <span class='string'>'\u{20}'</span>), (<span class='string'>'\u{a0}'</span>, <span class='string'>'\u{a0}'</span>), + (<span class='string'>'\u{1680}'</span>, <span class='string'>'\u{1680}'</span>), (<span class='string'>'\u{2000}'</span>, <span class='string'>'\u{200a}'</span>), + (<span class='string'>'\u{2028}'</span>, <span class='string'>'\u{2029}'</span>), (<span class='string'>'\u{202f}'</span>, <span class='string'>'\u{202f}'</span>), + (<span class='string'>'\u{205f}'</span>, <span class='string'>'\u{205f}'</span>), (<span class='string'>'\u{3000}'</span>, <span class='string'>'\u{3000}'</span>), + ]).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_name_negate_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\P{Yi}"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_unicode_letter_negate_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\PZ"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\u{20}'</span>, <span class='string'>'\u{20}'</span>), (<span class='string'>'\u{a0}'</span>, <span class='string'>'\u{a0}'</span>), + (<span class='string'>'\u{1680}'</span>, <span class='string'>'\u{1680}'</span>), (<span class='string'>'\u{2000}'</span>, <span class='string'>'\u{200a}'</span>), + (<span class='string'>'\u{2028}'</span>, <span class='string'>'\u{2029}'</span>), (<span class='string'>'\u{202f}'</span>, <span class='string'>'\u{202f}'</span>), + (<span class='string'>'\u{205f}'</span>, <span class='string'>'\u{205f}'</span>), (<span class='string'>'\u{3000}'</span>, <span class='string'>'\u{3000}'</span>), + ]).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_d</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\d"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_s</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\s"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_w</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\w"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_d_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\D"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_s_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\S"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_w_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"\W"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_d_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\d"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_s_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\s"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_w_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\w"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_d_case_fold_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\D"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_s_case_fold_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\S"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>escape_perl_w_case_fold_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)\W"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[a]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'a'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\x00]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'\x00'</span>, <span class='string'>'\x00'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\n]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'\n'</span>, <span class='string'>'\n'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[\n]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'\n'</span>, <span class='string'>'\n'</span>)]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^a]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\x00'</span>, <span class='string'>'\x60'</span>), (<span class='string'>'\x62'</span>, <span class='string'>'\u{10FFFF}'</span>), + ]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\x00]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\x01'</span>, <span class='string'>'\u{10FFFF}'</span>), + ]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\n]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\x00'</span>, <span class='string'>'\x09'</span>), (<span class='string'>'\x0b'</span>, <span class='string'>'\u{10FFFF}'</span>), + ]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[^\n]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[ + (<span class='string'>'\x00'</span>, <span class='string'>'\x09'</span>), (<span class='string'>'\x0b'</span>, <span class='string'>'\u{10FFFF}'</span>), + ]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\d]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\d]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\w]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>negate</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\s]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class_negate_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\D]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\W]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\S]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class_casei</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[\d]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class_negate_casei</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\d]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\w]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\s]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_singleton_class_negate_negate_casei</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\D]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\W]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLW</span>).<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\S]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLS</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\d\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='ident'>PERLD</span>, <span class='ident'>YI</span>, + ]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\d\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='ident'>PERLD</span>, <span class='ident'>YI</span>, + ]).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class_negate_negate</span>() { + <span class='kw'>let</span> <span class='ident'>nperld</span> <span class='op'>=</span> <span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>(); + <span class='kw'>let</span> <span class='ident'>nyi</span> <span class='op'>=</span> <span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>negate</span>(); + <span class='kw'>let</span> <span class='ident'>cls</span> <span class='op'>=</span> <span class='ident'>CharClass</span>::<span class='ident'>empty</span>().<span class='ident'>merge</span>(<span class='ident'>nperld</span>).<span class='ident'>merge</span>(<span class='ident'>nyi</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[^\D\P{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>.<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class_casei</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[\d\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='ident'>PERLD</span>, <span class='ident'>YI</span>, + ]).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class_negate_casei</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\d\p{Yi}]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='ident'>PERLD</span>, <span class='ident'>YI</span>, + ]).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_multiple_class_negate_negate_casei</span>() { + <span class='kw'>let</span> <span class='ident'>nperld</span> <span class='op'>=</span> <span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>(); + <span class='kw'>let</span> <span class='ident'>nyi</span> <span class='op'>=</span> <span class='ident'>class</span>(<span class='ident'>YI</span>).<span class='ident'>negate</span>(); + <span class='kw'>let</span> <span class='ident'>class</span> <span class='op'>=</span> <span class='ident'>CharClass</span>::<span class='ident'>empty</span>().<span class='ident'>merge</span>(<span class='ident'>nperld</span>).<span class='ident'>merge</span>(<span class='ident'>nyi</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?i)[^\D\P{Yi}]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>.<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_class_hypen</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\p{Yi}-]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='kw-2'>&</span>[(<span class='string'>'-'</span>, <span class='string'>'-'</span>)], <span class='ident'>YI</span>, + ]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"[\p{Yi}-a]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[ + <span class='kw-2'>&</span>[(<span class='string'>'-'</span>, <span class='string'>'-'</span>)], <span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'a'</span>)], <span class='ident'>YI</span>, + ]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_brackets</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>']'</span>, <span class='string'>']'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[][]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'['</span>, <span class='string'>'['</span>), (<span class='string'>']'</span>, <span class='string'>']'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[[]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'['</span>, <span class='string'>'['</span>)])), + <span class='ident'>lit</span>(<span class='string'>']'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_brackets_hypen</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[]-]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'-'</span>, <span class='string'>'-'</span>), (<span class='string'>']'</span>, <span class='string'>']'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[-]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'-'</span>, <span class='string'>'-'</span>)])), + <span class='ident'>lit</span>(<span class='string'>']'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>class_overlapping</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[a-fd-h]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'h'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[a-fg-m]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'m'</span>)]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[:upper:]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[[:upper:]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_not</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[:abc:]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>':'</span>, <span class='string'>':'</span>), (<span class='string'>'a'</span>, <span class='string'>'c'</span>)]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_multiple</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[[:lower:][:upper:]]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>classes</span>(<span class='kw-2'>&</span>[<span class='ident'>UPPER</span>, <span class='ident'>LOWER</span>]))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_negate</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[[:^upper:]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>negate</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[^[:^upper:]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>))); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_negate_multiple</span>() { + <span class='kw'>let</span> (<span class='ident'>nlower</span>, <span class='ident'>nupper</span>) <span class='op'>=</span> (<span class='ident'>class</span>(<span class='ident'>LOWER</span>).<span class='ident'>negate</span>(), <span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>negate</span>()); + <span class='kw'>let</span> <span class='ident'>cls</span> <span class='op'>=</span> <span class='ident'>CharClass</span>::<span class='ident'>empty</span>().<span class='ident'>merge</span>(<span class='ident'>nlower</span>).<span class='ident'>merge</span>(<span class='ident'>nupper</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[[:^lower:][:^upper:]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>.<span class='ident'>clone</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"[^[:^lower:][:^upper:]]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>cls</span>.<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)[:upper:]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)[[:upper:]]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ascii_class_negate_case_fold</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)[[:^upper:]]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>negate</span>().<span class='ident'>case_fold</span>())); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?i)[^[:^upper:]]"</span>), + <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>UPPER</span>).<span class='ident'>case_fold</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_literal</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?x) a b c"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_literal_off</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?x) a b c(?-x) a"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), <span class='ident'>lit</span>(<span class='string'>'b'</span>), <span class='ident'>lit</span>(<span class='string'>'c'</span>), <span class='ident'>lit</span>(<span class='string'>' '</span>), <span class='ident'>lit</span>(<span class='string'>'a'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_class</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?x)[a + - z +]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'z'</span>)]))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>"(?x)[ ^ a + - z +]"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='kw-2'>&</span>[(<span class='string'>'a'</span>, <span class='string'>'z'</span>)]).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_escape</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)\ d"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>))); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)\ + D"</span>), <span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>).<span class='ident'>negate</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_comments</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)(?P<foo> + a # comment 1 +)(?P<bar> + z # comment 2 +)"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>1</span>), + <span class='ident'>name</span>: <span class='prelude-val'>Some</span>(<span class='string'>"foo"</span>.<span class='ident'>into</span>()), + }, + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>lit</span>(<span class='string'>'z'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>Some</span>(<span class='number'>2</span>), + <span class='ident'>name</span>: <span class='prelude-val'>Some</span>(<span class='string'>"bar"</span>.<span class='ident'>into</span>()), + }, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_comments_re_enable</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)a # hi +(?-x:#) # sweet"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), + <span class='ident'>Expr</span>::<span class='ident'>Group</span> { + <span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>lit</span>(<span class='string'>'#'</span>)), + <span class='ident'>i</span>: <span class='prelude-val'>None</span>, + <span class='ident'>name</span>: <span class='prelude-val'>None</span>, + }, + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_escape_punctuation</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)\\\.\+\*\?\(\)\|\[\]\{\}\^\$\#"</span>), <span class='ident'>c</span>(<span class='kw-2'>&</span>[ + <span class='ident'>lit</span>(<span class='string'>'\\'</span>), <span class='ident'>lit</span>(<span class='string'>'.'</span>), <span class='ident'>lit</span>(<span class='string'>'+'</span>), <span class='ident'>lit</span>(<span class='string'>'*'</span>), <span class='ident'>lit</span>(<span class='string'>'?'</span>), + <span class='ident'>lit</span>(<span class='string'>'('</span>), <span class='ident'>lit</span>(<span class='string'>')'</span>), <span class='ident'>lit</span>(<span class='string'>'|'</span>), <span class='ident'>lit</span>(<span class='string'>'['</span>), <span class='ident'>lit</span>(<span class='string'>']'</span>), + <span class='ident'>lit</span>(<span class='string'>'{'</span>), <span class='ident'>lit</span>(<span class='string'>'}'</span>), <span class='ident'>lit</span>(<span class='string'>'^'</span>), <span class='ident'>lit</span>(<span class='string'>'$'</span>), <span class='ident'>lit</span>(<span class='string'>'#'</span>), + ])); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>ignore_space_escape_hash</span>() { + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>p</span>(<span class='string'>r"(?x)a\# # hi there"</span>), <span class='ident'>Expr</span>::<span class='ident'>Concat</span>(<span class='macro'>vec</span><span class='macro'>!</span>[ + <span class='ident'>lit</span>(<span class='string'>'a'</span>), + <span class='ident'>lit</span>(<span class='string'>'#'</span>), + ])); + } + + <span class='comment'>// Test every single possible error case.</span> + + <span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>test_err</span> { + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>re</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>pos</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>kind</span>:<span class='ident'>expr</span>) <span class='op'>=></span> {{ + <span class='kw'>let</span> <span class='ident'>err</span> <span class='op'>=</span> <span class='ident'>Parser</span>::<span class='ident'>parse</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>re</span>).<span class='ident'>unwrap_err</span>(); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>pos</span>, <span class='ident'>err</span>.<span class='ident'>pos</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>kind</span>, <span class='ident'>err</span>.<span class='ident'>kind</span>); + <span class='macro'>assert</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>re</span>.<span class='ident'>contains</span>(<span class='kw-2'>&</span><span class='ident'>err</span>.<span class='ident'>surround</span>)); + }} + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_no_expr_simple</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(*"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterExpectsExpr</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_no_expr_counted</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"({5}"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterExpectsExpr</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_beginning_counted</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"{5}"</span>, <span class='number'>0</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterExpectsExpr</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_illegal_exprs_simple</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a**"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + })); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a|*"</span>, <span class='number'>2</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>)])) + ); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_illegal_exprs_counted</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a*{5}"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>Expr</span>::<span class='ident'>Repeat</span> { + <span class='ident'>e</span>: <span class='ident'>b</span>(<span class='ident'>lit</span>(<span class='string'>'a'</span>)), + <span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>, + <span class='ident'>greedy</span>: <span class='boolval'>true</span>, + })); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a|{5}"</span>, <span class='number'>2</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>RepeaterUnexpectedExpr</span>(<span class='ident'>Expr</span>::<span class='ident'>Alternate</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>lit</span>(<span class='string'>'a'</span>)])) + ); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_empty_number</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{}"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>MissingBase10</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_eof</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{5"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedRepeat</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_empty_number_eof</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{xyz"</span>, <span class='number'>5</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"xyz"</span>.<span class='ident'>into</span>())); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{12,xyz"</span>, <span class='number'>8</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"xyz"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_invalid_number</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{9999999999}"</span>, <span class='number'>12</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"9999999999"</span>.<span class='ident'>into</span>())); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{1,9999999999}"</span>, <span class='number'>14</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"9999999999"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_invalid_number_extra</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{12x}"</span>, <span class='number'>5</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"12x"</span>.<span class='ident'>into</span>())); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{1,12x}"</span>, <span class='number'>7</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase10</span>(<span class='string'>"12x"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_repeat_invalid_range</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a{2,1}"</span>, <span class='number'>5</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidRepeatRange</span> { <span class='ident'>min</span>: <span class='number'>2</span>, <span class='ident'>max</span>: <span class='number'>1</span> }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_alternate_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"|a"</span>, <span class='number'>0</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_alternate_empty_with_group</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(|a)"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_alternate_empty_with_alternate</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a||"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_unopened_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>")"</span>, <span class='number'>0</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnopenedParen</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_unopened</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"ab)"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnopenedParen</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_unopened_with_alt</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a|b)"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnopenedParen</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_empty_alt</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(a|)"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_empty_group</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"()"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyGroup</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_close_paren_empty_group_with_name</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<foo>)"</span>, <span class='number'>8</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyGroup</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_finish_concat_unclosed</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"ab(xy"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedParen</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_finish_concat_empty_alt</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"a|"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyAlternate</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_name_invalid</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<a#>x)"</span>, <span class='number'>6</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidCaptureName</span>(<span class='string'>"a#"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_name_invalid_leading</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<1a>a)"</span>, <span class='number'>6</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidCaptureName</span>(<span class='string'>"1a"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_name_unexpected_eof</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<a"</span>, <span class='number'>5</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedCaptureName</span>(<span class='string'>"a"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_name_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<>a)"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyCaptureName</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_opts_unrecognized_flag</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?z:a)"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedFlag</span>(<span class='string'>'z'</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_opts_unexpected_eof</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?i"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedFlagEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_opts_double_negation</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?-i-s:a)"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>DoubleFlagNegation</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_opts_empty_negation</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?i-:a)"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyFlagNegation</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_group_opts_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?)"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>EmptyFlagNegation</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_unexpected_eof</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedEscapeEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_unrecognized</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\m"</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedEscape</span>(<span class='string'>'m'</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex2_eof0</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedTwoDigitHexEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex2_eof1</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\xA"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedTwoDigitHexEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex2_invalid</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\xAG"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='string'>"AG"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_eof0</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='string'>""</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_eof1</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{A"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedHex</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_invalid</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{AG}"</span>, <span class='number'>5</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='string'>"AG"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_invalid_scalar_value_surrogate</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{D800}"</span>, <span class='number'>7</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidScalarValue</span>(<span class='number'>0xD800</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_invalid_scalar_value_high</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{110000}"</span>, <span class='number'>9</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidScalarValue</span>(<span class='number'>0x110000</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_escape_hex_invalid_u32</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\x{9999999999}"</span>, <span class='number'>13</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidBase16</span>(<span class='string'>"9999999999"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_unicode_unclosed</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\p{"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedUnicodeName</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\p{Greek"</span>, <span class='number'>8</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnclosedUnicodeName</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_unicode_no_letter</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\p"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedEscapeEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_unicode_unknown_letter</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\pA"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedUnicodeClass</span>(<span class='string'>"A"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_unicode_unknown_name</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"\p{Yii}"</span>, <span class='number'>7</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedUnicodeClass</span>(<span class='string'>"Yii"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_eof_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"["</span>, <span class='number'>1</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[^"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_eof_non_empty</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[a"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[^a"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_eof_range</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[a-"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[^a-"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[---"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_invalid_escape</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"[\pA]"</span>, <span class='number'>4</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>UnrecognizedUnicodeClass</span>(<span class='string'>"A"</span>.<span class='ident'>into</span>())); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_valid_escape_not_allowed</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"[\A]"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>Expr</span>::<span class='ident'>StartText</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_range_valid_escape_not_allowed</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"[a-\d]"</span>, <span class='number'>5</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>Expr</span>::<span class='ident'>Class</span>(<span class='ident'>class</span>(<span class='ident'>PERLD</span>)))); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"[a-\A]"</span>, <span class='number'>5</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>Expr</span>::<span class='ident'>StartText</span>)); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>r"[\A-a]"</span>, <span class='number'>3</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassEscape</span>(<span class='ident'>Expr</span>::<span class='ident'>StartText</span>)); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_invalid_range</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[z-a]"</span>, <span class='number'>4</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>InvalidClassRange</span> { + <span class='ident'>start</span>: <span class='string'>'z'</span>, + <span class='ident'>end</span>: <span class='string'>'a'</span>, + }); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_class_empty_range</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[]"</span>, <span class='number'>2</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"[^]"</span>, <span class='number'>3</span>, <span class='ident'>ErrorKind</span>::<span class='ident'>UnexpectedClassEof</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>error_duplicate_capture_name</span>() { + <span class='macro'>test_err</span><span class='macro'>!</span>(<span class='string'>"(?P<a>.)(?P<a>.)"</span>, <span class='number'>14</span>, + <span class='ident'>ErrorKind</span>::<span class='ident'>DuplicateCaptureName</span>(<span class='string'>"a"</span>.<span class='ident'>into</span>())); + } +} +</pre> +</section> + <section id='search' class="content hidden"></section> + + <section class="footer"></section> + + <div id="help" class="hidden"> + <div class="shortcuts"> + <h1>Keyboard shortcuts</h1> + <dl> + <dt>?</dt> + <dd>Show this help dialog</dd> + <dt>S</dt> + <dd>Focus the search field</dd> + <dt>⇤</dt> + <dd>Move up in search results</dd> + <dt>⇥</dt> + <dd>Move down in search results</dd> + <dt>⏎</dt> + <dd>Go to active search result</dd> + </dl> + </div> + <div class="infos"> + <h1>Search tricks</h1> + <p> + Prefix searches with a type followed by a colon (e.g. + <code>fn:</code>) to restrict the search to a 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