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diff --git a/src/aho_corasick/autiter.rs.html b/src/aho_corasick/autiter.rs.html new file mode 100644 index 0000000..af7f372 --- /dev/null +++ b/src/aho_corasick/autiter.rs.html @@ -0,0 +1,747 @@ +<!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/aho-corasick-0.2.1/src/autiter.rs`."> + <meta name="keywords" content="rust, rustlang, rust-lang"> + + <title>autiter.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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class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::{<span class='self'>self</span>, <span class='ident'>BufRead</span>, <span class='ident'>Read</span>}; + +<span class='kw'>use</span> <span class='ident'>super</span>::{<span class='ident'>ROOT_STATE</span>, <span class='ident'>PatIdx</span>, <span class='ident'>StateIdx</span>}; + +<span class='doccomment'>/// An abstraction over automatons and their corresponding iterators.</span> +<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Automaton</span>: <span class='ident'>Sized</span> { + <span class='doccomment'>/// Return the next state given the current state and next character.</span> + <span class='kw'>fn</span> <span class='ident'>next_state</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, <span class='ident'>b</span>: <span class='ident'>u8</span>) <span class='op'>-></span> <span class='ident'>StateIdx</span>; + + <span class='doccomment'>/// Return true if and only if the given state and current pattern index</span> + <span class='doccomment'>/// indicate a match.</span> + <span class='kw'>fn</span> <span class='ident'>has_match</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, <span class='ident'>outi</span>: <span class='ident'>PatIdx</span>) <span class='op'>-></span> <span class='ident'>bool</span>; + + <span class='doccomment'>/// Build a match given the current state, pattern index and input index.</span> + <span class='kw'>fn</span> <span class='ident'>get_match</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, <span class='ident'>outi</span>: <span class='ident'>PatIdx</span>, <span class='ident'>texti</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>Match</span>; + + <span class='doccomment'>/// Attempt to skip through the input.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This returns the index into `text` at which the next match attempt</span> + <span class='doccomment'>/// should start. (If no skipping occurred, then the return value should</span> + <span class='doccomment'>/// be equal to `at`.)</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Finally, if no match is possible, then return `text.len()`.</span> + <span class='kw'>fn</span> <span class='ident'>skip_to</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>at</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>usize</span>; + + <span class='doccomment'>/// Returns true if and only if this automaton can skip through the input.</span> + <span class='kw'>fn</span> <span class='ident'>is_skippable</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span>; + + <span class='doccomment'>/// Returns all of the patterns matched by this automaton.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The order of the patterns is the order in which they were added.</span> + <span class='kw'>fn</span> <span class='ident'>patterns</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span>[<span class='ident'>String</span>]; + + <span class='doccomment'>/// Returns the pattern indexed at `i`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The index corresponds to the position at which the pattern was added</span> + <span class='doccomment'>/// to the automaton, starting at `0`.</span> + <span class='kw'>fn</span> <span class='ident'>pattern</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>i</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='ident'>str</span>; + + <span class='doccomment'>/// Return the number of patterns in the automaton.</span> + <span class='attribute'>#[<span class='ident'>inline</span>]</span> + <span class='kw'>fn</span> <span class='ident'>len</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='self'>self</span>.<span class='ident'>patterns</span>().<span class='ident'>len</span>() + } + + <span class='doccomment'>/// Returns true if the automaton has no patterns.</span> + <span class='attribute'>#[<span class='ident'>inline</span>]</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='self'>self</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> + } + + <span class='doccomment'>/// Returns an iterator of non-overlapping matches in `s`.</span> + <span class='kw'>fn</span> <span class='ident'>find</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span><span class='op'>></span>( + <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>, + <span class='ident'>s</span>: <span class='kw-2'>&</span><span class='lifetime'>'s</span> <span class='ident'>str</span>, + ) <span class='op'>-></span> <span class='ident'>Matches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='kw'>Self</span><span class='op'>></span> { + <span class='ident'>Matches</span> { + <span class='ident'>aut</span>: <span class='self'>self</span>, + <span class='ident'>text</span>: <span class='ident'>s</span>.<span class='ident'>as_bytes</span>(), + <span class='ident'>texti</span>: <span class='number'>0</span>, + <span class='ident'>si</span>: <span class='ident'>ROOT_STATE</span>, + } + } + + <span class='doccomment'>/// Returns an iterator of overlapping matches in `s`.</span> + <span class='kw'>fn</span> <span class='ident'>find_overlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span><span class='op'>></span>( + <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>, + <span class='ident'>s</span>: <span class='kw-2'>&</span><span class='lifetime'>'s</span> <span class='ident'>str</span>, + ) <span class='op'>-></span> <span class='ident'>MatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='kw'>Self</span><span class='op'>></span> { + <span class='ident'>MatchesOverlapping</span> { + <span class='ident'>aut</span>: <span class='self'>self</span>, + <span class='ident'>text</span>: <span class='ident'>s</span>.<span class='ident'>as_bytes</span>(), + <span class='ident'>texti</span>: <span class='number'>0</span>, + <span class='ident'>si</span>: <span class='ident'>ROOT_STATE</span>, + <span class='ident'>outi</span>: <span class='number'>0</span>, + } + } + + <span class='doccomment'>/// Returns an iterator of non-overlapping matches in the given reader.</span> + <span class='kw'>fn</span> <span class='ident'>stream_find</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>: <span class='ident'>io</span>::<span class='ident'>Read</span><span class='op'>></span>( + <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>, + <span class='ident'>rdr</span>: <span class='ident'>R</span>, + ) <span class='op'>-></span> <span class='ident'>StreamMatches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='kw'>Self</span><span class='op'>></span> { + <span class='ident'>StreamMatches</span> { + <span class='ident'>aut</span>: <span class='self'>self</span>, + <span class='ident'>buf</span>: <span class='ident'>io</span>::<span class='ident'>BufReader</span>::<span class='ident'>new</span>(<span class='ident'>rdr</span>), + <span class='ident'>texti</span>: <span class='number'>0</span>, + <span class='ident'>si</span>: <span class='ident'>ROOT_STATE</span>, + } + } + + <span class='doccomment'>/// Returns an iterator of overlapping matches in the given reader.</span> + <span class='kw'>fn</span> <span class='ident'>stream_find_overlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>: <span class='ident'>io</span>::<span class='ident'>Read</span><span class='op'>></span>( + <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>, + <span class='ident'>rdr</span>: <span class='ident'>R</span>, + ) <span class='op'>-></span> <span class='ident'>StreamMatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='kw'>Self</span><span class='op'>></span> { + <span class='ident'>StreamMatchesOverlapping</span> { + <span class='ident'>aut</span>: <span class='self'>self</span>, + <span class='ident'>buf</span>: <span class='ident'>io</span>::<span class='ident'>BufReader</span>::<span class='ident'>new</span>(<span class='ident'>rdr</span>), + <span class='ident'>texti</span>: <span class='number'>0</span>, + <span class='ident'>si</span>: <span class='ident'>ROOT_STATE</span>, + <span class='ident'>outi</span>: <span class='number'>0</span>, + } + } +} + +<span class='doccomment'>/// Records a match in the search text.</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Copy</span>, <span class='ident'>Clone</span>, <span class='ident'>Debug</span>, <span class='ident'>Hash</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Match</span> { + <span class='doccomment'>/// The pattern index.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This corresponds to the ordering in which the matched pattern was</span> + <span class='doccomment'>/// added to the automaton, starting at `0`.</span> + <span class='kw'>pub</span> <span class='ident'>pati</span>: <span class='ident'>usize</span>, + <span class='doccomment'>/// The starting byte offset of the match in the search text.</span> + <span class='kw'>pub</span> <span class='ident'>start</span>: <span class='ident'>usize</span>, + <span class='doccomment'>/// The ending byte offset of the match in the search text.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// (This can be re-captiulated with `pati` and adding the pattern's</span> + <span class='doccomment'>/// length to `start`, but it is convenient to have it here.)</span> + <span class='kw'>pub</span> <span class='ident'>end</span>: <span class='ident'>usize</span>, +} + +<span class='doccomment'>/// An iterator of non-overlapping matches for in-memory text.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// This iterator yields `Match` values.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'a` is the lifetime of the automaton and `'s` is the lifetime of the</span> +<span class='doccomment'>/// search text.</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'>Matches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span>: <span class='lifetime'>'a</span> <span class='op'>+</span> <span class='ident'>Automaton</span><span class='op'>></span> { + <span class='ident'>aut</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>A</span>, + <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'s</span> [<span class='ident'>u8</span>], + <span class='ident'>texti</span>: <span class='ident'>usize</span>, + <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span>: <span class='ident'>Automaton</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>Matches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>Match</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'>Match</span><span class='op'>></span> { + <span class='comment'>// When there's an initial lone start byte, it is usually worth it</span> + <span class='comment'>// to use `memchr` to skip along the input. The problem is that</span> + <span class='comment'>// the skipping function is called in the inner match loop, which</span> + <span class='comment'>// can be quite costly if the skipping condition is never met.</span> + <span class='comment'>// Therefore, we lift the case analysis outside of the main loop at</span> + <span class='comment'>// the cost of repeating code.</span> + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>is_skippable</span>() { + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>skip_to</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>text</span>.<span class='ident'>len</span>() { + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>next_state</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>texti</span>]); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>) { + <span class='kw'>let</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='ident'>ROOT_STATE</span>; + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='ident'>m</span>); + } + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>skip_to</span>( + <span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>, <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+</span> <span class='number'>1</span>); + } + } <span class='kw'>else</span> { + <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>text</span>.<span class='ident'>len</span>() { + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>next_state</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>texti</span>]); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>) { + <span class='kw'>let</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='ident'>ROOT_STATE</span>; + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='ident'>m</span>); + } + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + } + <span class='prelude-val'>None</span> + } +} + +<span class='doccomment'>/// An iterator of non-overlapping matches for streaming text.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// This iterator yields `io::Result<Match>` values.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'a` is the lifetime of the automaton and `R` is the type of the underlying</span> +<span class='doccomment'>/// `io::Read`er.</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'>StreamMatches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='ident'>A</span>: <span class='lifetime'>'a</span> <span class='op'>+</span> <span class='ident'>Automaton</span><span class='op'>></span> { + <span class='ident'>aut</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>A</span>, + <span class='ident'>buf</span>: <span class='ident'>io</span>::<span class='ident'>BufReader</span><span class='op'><</span><span class='ident'>R</span><span class='op'>></span>, + <span class='ident'>texti</span>: <span class='ident'>usize</span>, + <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>: <span class='ident'>io</span>::<span class='ident'>Read</span>, <span class='ident'>A</span>: <span class='ident'>Automaton</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>StreamMatches</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='ident'>A</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Match</span><span class='op'>></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'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Match</span><span class='op'>>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='prelude-val'>None</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>consumed</span> <span class='op'>=</span> <span class='number'>0</span>; +<span class='lifetime'>'LOOP</span>: <span class='kw'>loop</span> { + <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>consume</span>(<span class='ident'>consumed</span>); + <span class='kw'>let</span> <span class='ident'>bs</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>fill_buf</span>() { + <span class='prelude-val'>Err</span>(<span class='ident'>err</span>) <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='prelude-val'>Err</span>(<span class='ident'>err</span>)), + <span class='prelude-val'>Ok</span>(<span class='ident'>bs</span>) <span class='kw'>if</span> <span class='ident'>bs</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> <span class='op'>=></span> <span class='kw'>break</span>, + <span class='prelude-val'>Ok</span>(<span class='ident'>bs</span>) <span class='op'>=></span> <span class='ident'>bs</span>, + }; + <span class='ident'>consumed</span> <span class='op'>=</span> <span class='ident'>bs</span>.<span class='ident'>len</span>(); <span class='comment'>// is shortened if we find a match</span> + <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='kw-2'>&</span><span class='ident'>b</span>) <span class='kw'>in</span> <span class='ident'>bs</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() { + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>next_state</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='ident'>b</span>); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>) { + <span class='ident'>m</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='prelude-val'>Ok</span>(<span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='number'>0</span>, <span class='self'>self</span>.<span class='ident'>texti</span>))); + <span class='ident'>consumed</span> <span class='op'>=</span> <span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span>; + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='ident'>ROOT_STATE</span>; + <span class='kw'>break</span> <span class='lifetime'>'LOOP</span>; + } + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + } + <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>consume</span>(<span class='ident'>consumed</span>); + <span class='ident'>m</span> + } +} + +<span class='doccomment'>/// An iterator of overlapping matches for in-memory text.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// This iterator yields `Match` values.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'a` is the lifetime of the automaton and `'s` is the lifetime of the</span> +<span class='doccomment'>/// search text.</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'>MatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span>: <span class='lifetime'>'a</span> <span class='op'>+</span> <span class='ident'>Automaton</span><span class='op'>></span> { + <span class='ident'>aut</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>A</span>, + <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'s</span> [<span class='ident'>u8</span>], + <span class='ident'>texti</span>: <span class='ident'>usize</span>, + <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, + <span class='ident'>outi</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span>: <span class='ident'>Automaton</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>MatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'s</span>, <span class='ident'>A</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>Match</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'>Match</span><span class='op'>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='kw'>let</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='self'>self</span>.<span class='ident'>outi</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='ident'>m</span>); + } + + <span class='self'>self</span>.<span class='ident'>outi</span> <span class='op'>=</span> <span class='number'>0</span>; + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>skip_to</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>text</span>.<span class='ident'>len</span>() { + <span class='kw'>let</span> <span class='ident'>b</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>texti</span>]; + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>next_state</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='ident'>b</span>); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='kw'>return</span> <span class='self'>self</span>.<span class='ident'>next</span>(); + } + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>skip_to</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>text</span>, <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+</span> <span class='number'>1</span>); + } + <span class='prelude-val'>None</span> + } +} + +<span class='doccomment'>/// An iterator of overlapping matches for streaming text.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// This iterator yields `io::Result<Match>` values.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'a` is the lifetime of the automaton and `R` is the type of the underlying</span> +<span class='doccomment'>/// `io::Read`er.</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'>StreamMatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='ident'>A</span>: <span class='lifetime'>'a</span> <span class='op'>+</span> <span class='ident'>Automaton</span><span class='op'>></span> { + <span class='ident'>aut</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>A</span>, + <span class='ident'>buf</span>: <span class='ident'>io</span>::<span class='ident'>BufReader</span><span class='op'><</span><span class='ident'>R</span><span class='op'>></span>, + <span class='ident'>texti</span>: <span class='ident'>usize</span>, + <span class='ident'>si</span>: <span class='ident'>StateIdx</span>, + <span class='ident'>outi</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span> + <span class='lifetime'>'a</span>, + <span class='ident'>R</span>: <span class='ident'>io</span>::<span class='ident'>Read</span>, + <span class='ident'>A</span>: <span class='ident'>Automaton</span>, +<span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>StreamMatchesOverlapping</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>R</span>, <span class='ident'>A</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Match</span><span class='op'>></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'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Match</span><span class='op'>>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='kw'>let</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>, <span class='self'>self</span>.<span class='ident'>texti</span>); + <span class='self'>self</span>.<span class='ident'>outi</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='prelude-val'>Ok</span>(<span class='ident'>m</span>)); + } + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>m</span> <span class='op'>=</span> <span class='prelude-val'>None</span>; + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>consumed</span> <span class='op'>=</span> <span class='number'>0</span>; + <span class='self'>self</span>.<span class='ident'>outi</span> <span class='op'>=</span> <span class='number'>0</span>; +<span class='lifetime'>'LOOP</span>: <span class='kw'>loop</span> { + <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>consume</span>(<span class='ident'>consumed</span>); + <span class='kw'>let</span> <span class='ident'>bs</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>fill_buf</span>() { + <span class='prelude-val'>Err</span>(<span class='ident'>err</span>) <span class='op'>=></span> <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='prelude-val'>Err</span>(<span class='ident'>err</span>)), + <span class='prelude-val'>Ok</span>(<span class='ident'>bs</span>) <span class='kw'>if</span> <span class='ident'>bs</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> <span class='op'>=></span> <span class='kw'>break</span>, + <span class='prelude-val'>Ok</span>(<span class='ident'>bs</span>) <span class='op'>=></span> <span class='ident'>bs</span>, + }; + <span class='ident'>consumed</span> <span class='op'>=</span> <span class='ident'>bs</span>.<span class='ident'>len</span>(); <span class='comment'>// is shortened if we find a match</span> + <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='kw-2'>&</span><span class='ident'>b</span>) <span class='kw'>in</span> <span class='ident'>bs</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() { + <span class='self'>self</span>.<span class='ident'>si</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>next_state</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='ident'>b</span>); + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='ident'>m</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='prelude-val'>Ok</span>(<span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>get_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>, + <span class='self'>self</span>.<span class='ident'>texti</span>))); + <span class='ident'>consumed</span> <span class='op'>=</span> <span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span>; + <span class='self'>self</span>.<span class='ident'>outi</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>aut</span>.<span class='ident'>has_match</span>(<span class='self'>self</span>.<span class='ident'>si</span>, <span class='self'>self</span>.<span class='ident'>outi</span>) { + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + <span class='kw'>break</span> <span class='lifetime'>'LOOP</span>; + } + <span class='self'>self</span>.<span class='ident'>texti</span> <span class='op'>+=</span> <span class='number'>1</span>; + } + } + <span class='self'>self</span>.<span class='ident'>buf</span>.<span class='ident'>consume</span>(<span class='ident'>consumed</span>); + <span class='ident'>m</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 given type. + </p> + <p> + Accepted types are: <code>fn</code>, <code>mod</code>, + <code>struct</code>, <code>enum</code>, + <code>trait</code>, <code>typedef</code> (or + <code>tdef</code>). + </p> + <p> + Search functions by type signature (e.g. + <code>vec -> usize</code>) + </p> + </div> + </div> + + + + <script> + window.rootPath = "../../"; 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