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diff --git a/src/carboxyl/lift.rs.html b/src/carboxyl/lift.rs.html new file mode 100644 index 0000000..224dbe8 --- /dev/null +++ b/src/carboxyl/lift.rs.html @@ -0,0 +1,605 @@ +<!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/carboxyl-0.1.1/src/lift.rs`."> + <meta name="keywords" content="rust, rustlang, rust-lang"> + + <title>lift.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"> 28</span> +<span 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id="253">253</span> +<span id="254">254</span> +</pre><pre class='rust '> +<span class='doccomment'>//! Lifting of n-ary functions.</span> +<span class='doccomment'>//!</span> +<span class='doccomment'>//! A lift maps a function on values to a function on signals. Given a function of</span> +<span class='doccomment'>//! type `F: Fn(A, B, …) -> R` and signals of types `Signal<A>, Signal<B>, …` the</span> +<span class='doccomment'>//! `lift!` macro creates a `Signal<R>`, whose content is computed using the</span> +<span class='doccomment'>//! function.</span> +<span class='doccomment'>//!</span> +<span class='doccomment'>//! Currently lift is only implemented for functions with up to four arguments.</span> +<span class='doccomment'>//! This limitation is due to the current implementation strategy (and maybe</span> +<span class='doccomment'>//! limitations of Rust's type system), but it can be increased to arbitrary but</span> +<span class='doccomment'>//! finite arity if required.</span> +<span class='doccomment'>//!</span> +<span class='doccomment'>//! # Example</span> +<span class='doccomment'>//!</span> +<span class='doccomment'>//! ```</span> +<span class='doccomment'>//! # #[macro_use] extern crate carboxyl;</span> +<span class='doccomment'>//! # fn main() {</span> +<span class='doccomment'>//! # use carboxyl::Sink;</span> +<span class='doccomment'>//! let sink_a = Sink::new();</span> +<span class='doccomment'>//! let sink_b = Sink::new();</span> +<span class='doccomment'>//! let product = lift!(</span> +<span class='doccomment'>//! |a, b| a * b,</span> +<span class='doccomment'>//! &sink_a.stream().hold(0),</span> +<span class='doccomment'>//! &sink_b.stream().hold(0)</span> +<span class='doccomment'>//! );</span> +<span class='doccomment'>//! assert_eq!(product.sample(), 0);</span> +<span class='doccomment'>//! sink_a.send(3);</span> +<span class='doccomment'>//! sink_b.send(5);</span> +<span class='doccomment'>//! assert_eq!(product.sample(), 15);</span> +<span class='doccomment'>//! # }</span> +<span class='doccomment'>//! ```</span> + +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>sync</span>::<span class='ident'>Arc</span>; +<span class='kw'>use</span> <span class='ident'>signal</span>::{ <span class='ident'>Signal</span>, <span class='ident'>SignalFn</span>, <span class='ident'>signal_build</span>, <span class='ident'>signal_current</span>, <span class='ident'>signal_source</span>, <span class='ident'>reg_signal</span>, <span class='ident'>sample_raw</span> }; +<span class='kw'>use</span> <span class='ident'>transaction</span>::<span class='ident'>commit</span>; + + +<span class='attribute'>#[<span class='ident'>macro_export</span>]</span> +<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>lift</span> { + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>: <span class='ident'>expr</span>) + <span class='op'>=></span> ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>crate</span>::<span class='ident'>lift</span>::<span class='ident'>lift0</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>) ); + + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>: <span class='ident'>expr</span>) + <span class='op'>=></span> ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>crate</span>::<span class='ident'>lift</span>::<span class='ident'>lift1</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>) ); + + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>: <span class='ident'>expr</span>) + <span class='op'>=></span> ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>crate</span>::<span class='ident'>lift</span>::<span class='ident'>lift2</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>) ); + + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>: <span class='ident'>expr</span>) + <span class='op'>=></span> ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>crate</span>::<span class='ident'>lift</span>::<span class='ident'>lift3</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>) ); + + (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>: <span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>d</span>: <span class='ident'>expr</span>) + <span class='op'>=></span> ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>crate</span>::<span class='ident'>lift</span>::<span class='ident'>lift4</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>f</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>d</span>) ); +} + + +<span class='doccomment'>/// Lift a 0-ary function.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>lift0</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>F</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='ident'>F</span>) <span class='op'>-></span> <span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span> + <span class='kw'>where</span> <span class='ident'>F</span>: <span class='ident'>Fn</span>() <span class='op'>-></span> <span class='ident'>A</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span> +{ + <span class='ident'>commit</span>(<span class='op'>||</span> <span class='ident'>signal_build</span>(<span class='ident'>SignalFn</span>::<span class='ident'>from_fn</span>(<span class='ident'>f</span>), ())) +} + + +<span class='doccomment'>/// Lift a unary function.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>lift1</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>F</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='ident'>F</span>, <span class='ident'>sa</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>Signal</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span> + <span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>) <span class='op'>-></span> <span class='ident'>B</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, +{ + <span class='kw'>fn</span> <span class='ident'>make_callback</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>F</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='kw-2'>&</span><span class='ident'>Arc</span><span class='op'><</span><span class='ident'>F</span><span class='op'>></span>, <span class='ident'>parent</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>SignalFn</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span> + <span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>) <span class='op'>-></span> <span class='ident'>B</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + { + <span class='kw'>let</span> <span class='ident'>pclone</span> <span class='op'>=</span> <span class='ident'>parent</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>f</span> <span class='op'>=</span> <span class='ident'>f</span>.<span class='ident'>clone</span>(); + <span class='kw'>match</span> <span class='op'>*</span><span class='ident'>signal_current</span>(<span class='kw-2'>&</span><span class='ident'>parent</span>).<span class='ident'>read</span>().<span class='ident'>unwrap</span>().<span class='ident'>future</span>() { + <span class='ident'>SignalFn</span>::<span class='ident'>Const</span>(<span class='kw-2'>ref</span> <span class='ident'>a</span>) <span class='op'>=></span> <span class='ident'>SignalFn</span>::<span class='ident'>Const</span>(<span class='ident'>f</span>(<span class='ident'>a</span>.<span class='ident'>clone</span>())), + <span class='ident'>SignalFn</span>::<span class='ident'>Func</span>(_) <span class='op'>=></span> <span class='ident'>SignalFn</span>::<span class='ident'>from_fn</span>(<span class='kw'>move</span> <span class='op'>||</span> <span class='ident'>f</span>(<span class='ident'>sample_raw</span>(<span class='kw-2'>&</span><span class='ident'>pclone</span>))), + } + } + + <span class='ident'>commit</span>(<span class='op'>||</span> { + <span class='kw'>let</span> <span class='ident'>f</span> <span class='op'>=</span> <span class='ident'>Arc</span>::<span class='ident'>new</span>(<span class='ident'>f</span>); + <span class='kw'>let</span> <span class='ident'>signal</span> <span class='op'>=</span> <span class='ident'>signal_build</span>(<span class='ident'>make_callback</span>(<span class='kw-2'>&</span><span class='ident'>f</span>, <span class='kw-2'>&</span><span class='ident'>sa</span>), ()); + <span class='kw'>let</span> <span class='ident'>sa_clone</span> <span class='op'>=</span> <span class='ident'>sa</span>.<span class='ident'>clone</span>(); + <span class='ident'>reg_signal</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>signal_source</span>(<span class='kw-2'>&</span><span class='ident'>sa</span>).<span class='ident'>write</span>().<span class='ident'>unwrap</span>(), <span class='kw-2'>&</span><span class='ident'>signal</span>, + <span class='kw'>move</span> <span class='op'>|</span>_<span class='op'>|</span> <span class='ident'>make_callback</span>(<span class='kw-2'>&</span><span class='ident'>f</span>, <span class='kw-2'>&</span><span class='ident'>sa_clone</span>)); + <span class='ident'>signal</span> + }) +} + + +<span class='doccomment'>/// Lift a binary function.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>lift2</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>F</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='ident'>F</span>, <span class='ident'>sa</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>, <span class='ident'>sb</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>Signal</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> + <span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>C</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>, <span class='ident'>B</span>) <span class='op'>-></span> <span class='ident'>C</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, +{ + <span class='kw'>fn</span> <span class='ident'>make_callback</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>F</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='kw-2'>&</span><span class='ident'>Arc</span><span class='op'><</span><span class='ident'>F</span><span class='op'>></span>, <span class='ident'>sa</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>, <span class='ident'>sb</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>SignalFn</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> + <span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>C</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>, <span class='ident'>B</span>) <span class='op'>-></span> <span class='ident'>C</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + { + <span class='kw'>use</span> <span class='ident'>signal</span>::<span class='ident'>SignalFn</span>::{ <span class='ident'>Const</span>, <span class='ident'>Func</span> }; + <span class='kw'>let</span> <span class='ident'>sa_clone</span> <span class='op'>=</span> <span class='ident'>sa</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>sb_clone</span> <span class='op'>=</span> <span class='ident'>sb</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>f</span> <span class='op'>=</span> <span class='ident'>f</span>.<span class='ident'>clone</span>(); + <span class='kw'>match</span> ( + <span class='ident'>signal_current</span>(<span class='kw-2'>&</span><span class='ident'>sa</span>).<span class='ident'>read</span>().<span class='ident'>unwrap</span>().<span class='ident'>future</span>(), + <span class='ident'>signal_current</span>(<span class='kw-2'>&</span><span class='ident'>sb</span>).<span class='ident'>read</span>().<span class='ident'>unwrap</span>().<span class='ident'>future</span>(), + ) { + (<span class='kw-2'>&</span><span class='ident'>Const</span>(<span class='kw-2'>ref</span> <span class='ident'>a</span>), <span class='kw-2'>&</span><span class='ident'>Const</span>(<span class='kw-2'>ref</span> <span class='ident'>b</span>)) <span class='op'>=></span> <span class='ident'>Const</span>(<span class='ident'>f</span>(<span class='ident'>a</span>.<span class='ident'>clone</span>(), <span class='ident'>b</span>.<span class='ident'>clone</span>())), + (<span class='kw-2'>&</span><span class='ident'>Const</span>(<span class='kw-2'>ref</span> <span class='ident'>a</span>), <span class='kw-2'>&</span><span class='ident'>Func</span>(_)) <span class='op'>=></span> { + <span class='kw'>let</span> <span class='ident'>a</span> <span class='op'>=</span> <span class='ident'>a</span>.<span class='ident'>clone</span>(); + <span class='ident'>SignalFn</span>::<span class='ident'>from_fn</span>(<span class='kw'>move</span> <span class='op'>||</span> <span class='ident'>f</span>(<span class='ident'>a</span>.<span class='ident'>clone</span>(), <span class='ident'>sample_raw</span>(<span class='kw-2'>&</span><span class='ident'>sb_clone</span>))) + }, + (<span class='kw-2'>&</span><span class='ident'>Func</span>(_), <span class='kw-2'>&</span><span class='ident'>Const</span>(<span class='kw-2'>ref</span> <span class='ident'>b</span>)) <span class='op'>=></span> { + <span class='kw'>let</span> <span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>clone</span>(); + <span class='ident'>SignalFn</span>::<span class='ident'>from_fn</span>(<span class='kw'>move</span> <span class='op'>||</span> <span class='ident'>f</span>(<span class='ident'>sample_raw</span>(<span class='kw-2'>&</span><span class='ident'>sa_clone</span>), <span class='ident'>b</span>.<span class='ident'>clone</span>())) + }, + (<span class='kw-2'>&</span><span class='ident'>Func</span>(_), <span class='kw-2'>&</span><span class='ident'>Func</span>(_)) <span class='op'>=></span> <span class='ident'>SignalFn</span>::<span class='ident'>from_fn</span>( + <span class='kw'>move</span> <span class='op'>||</span> <span class='ident'>f</span>(<span class='ident'>sample_raw</span>(<span class='kw-2'>&</span><span class='ident'>sa_clone</span>), <span class='ident'>sample_raw</span>(<span class='kw-2'>&</span><span class='ident'>sb_clone</span>)) + ), + } + } + + <span class='ident'>commit</span>(<span class='kw'>move</span> <span class='op'>||</span> { + <span class='kw'>let</span> <span class='ident'>f</span> <span class='op'>=</span> <span class='ident'>Arc</span>::<span class='ident'>new</span>(<span class='ident'>f</span>); + <span class='kw'>let</span> <span class='ident'>signal</span> <span class='op'>=</span> <span class='ident'>signal_build</span>(<span class='ident'>make_callback</span>(<span class='kw-2'>&</span><span class='ident'>f</span>, <span class='kw-2'>&</span><span class='ident'>sa</span>, <span class='kw-2'>&</span><span class='ident'>sb</span>), ()); + <span class='ident'>reg_signal</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>signal_source</span>(<span class='kw-2'>&</span><span class='ident'>sa</span>).<span class='ident'>write</span>().<span class='ident'>unwrap</span>(), <span class='kw-2'>&</span><span class='ident'>signal</span>, { + <span class='kw'>let</span> <span class='ident'>sa_clone</span> <span class='op'>=</span> <span class='ident'>sa</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>sb_clone</span> <span class='op'>=</span> <span class='ident'>sb</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>f</span> <span class='op'>=</span> <span class='ident'>f</span>.<span class='ident'>clone</span>(); + <span class='kw'>move</span> <span class='op'>|</span>_<span class='op'>|</span> <span class='ident'>make_callback</span>(<span class='kw-2'>&</span><span class='ident'>f</span>, <span class='kw-2'>&</span><span class='ident'>sa_clone</span>, <span class='kw-2'>&</span><span class='ident'>sb_clone</span>) + }); + <span class='ident'>reg_signal</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>signal_source</span>(<span class='kw-2'>&</span><span class='ident'>sb</span>).<span class='ident'>write</span>().<span class='ident'>unwrap</span>(), <span class='kw-2'>&</span><span class='ident'>signal</span>, { + <span class='kw'>let</span> <span class='ident'>sa_clone</span> <span class='op'>=</span> <span class='ident'>sa</span>.<span class='ident'>clone</span>(); + <span class='kw'>let</span> <span class='ident'>sb_clone</span> <span class='op'>=</span> <span class='ident'>sb</span>.<span class='ident'>clone</span>(); + <span class='kw'>move</span> <span class='op'>|</span>_<span class='op'>|</span> <span class='ident'>make_callback</span>(<span class='kw-2'>&</span><span class='ident'>f</span>, <span class='kw-2'>&</span><span class='ident'>sa_clone</span>, <span class='kw-2'>&</span><span class='ident'>sb_clone</span>) + }); + <span class='ident'>signal</span> + }) +} + +<span class='doccomment'>/// Lift a ternary function.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>lift3</span><span class='op'><</span><span class='ident'>F</span>, <span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>Ret</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='ident'>F</span>, <span class='ident'>ca</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>, <span class='ident'>cb</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span>, <span class='ident'>cc</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span>) + <span class='op'>-></span> <span class='ident'>Signal</span><span class='op'><</span><span class='ident'>Ret</span><span class='op'>></span> +<span class='kw'>where</span> <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>) <span class='op'>-></span> <span class='ident'>Ret</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>C</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>Ret</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, +{ + <span class='ident'>lift2</span>(<span class='kw'>move</span> <span class='op'>|</span>(<span class='ident'>a</span>, <span class='ident'>b</span>), <span class='ident'>c</span><span class='op'>|</span> <span class='ident'>f</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>), <span class='kw-2'>&</span><span class='ident'>lift2</span>(<span class='op'>|</span><span class='ident'>a</span>, <span class='ident'>b</span><span class='op'>|</span> (<span class='ident'>a</span>, <span class='ident'>b</span>), <span class='ident'>ca</span>, <span class='ident'>cb</span>), <span class='ident'>cc</span>) +} + +<span class='doccomment'>/// Lift a quarternary function.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>lift4</span><span class='op'><</span><span class='ident'>F</span>, <span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>D</span>, <span class='ident'>Ret</span><span class='op'>></span>(<span class='ident'>f</span>: <span class='ident'>F</span>, <span class='ident'>ca</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>, <span class='ident'>cb</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span>, <span class='ident'>cc</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span>, <span class='ident'>cd</span>: <span class='kw-2'>&</span><span class='ident'>Signal</span><span class='op'><</span><span class='ident'>D</span><span class='op'>></span>) + <span class='op'>-></span> <span class='ident'>Signal</span><span class='op'><</span><span class='ident'>Ret</span><span class='op'>></span> +<span class='kw'>where</span> <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>D</span>) <span class='op'>-></span> <span class='ident'>Ret</span> <span class='op'>+</span> <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>A</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>B</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>C</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>D</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, + <span class='ident'>Ret</span>: <span class='ident'>Send</span> <span class='op'>+</span> <span class='ident'>Sync</span> <span class='op'>+</span> <span class='ident'>Clone</span> <span class='op'>+</span> <span class='lifetime'>'static</span>, +{ + <span class='ident'>lift2</span>( + <span class='kw'>move</span> <span class='op'>|</span>(<span class='ident'>a</span>, <span class='ident'>b</span>), (<span class='ident'>c</span>, <span class='ident'>d</span>)<span class='op'>|</span> <span class='ident'>f</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>), + <span class='kw-2'>&</span><span class='ident'>lift2</span>(<span class='op'>|</span><span class='ident'>a</span>, <span class='ident'>b</span><span class='op'>|</span> (<span class='ident'>a</span>, <span class='ident'>b</span>), <span class='ident'>ca</span>, <span class='ident'>cb</span>), + <span class='kw-2'>&</span><span class='ident'>lift2</span>(<span class='op'>|</span><span class='ident'>c</span>, <span class='ident'>d</span><span class='op'>|</span> (<span class='ident'>c</span>, <span class='ident'>d</span>), <span class='ident'>cc</span>, <span class='ident'>cd</span>) + ) +} + + +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> +<span class='kw'>mod</span> <span class='ident'>test</span> { + <span class='kw'>use</span> <span class='ident'>stream</span>::<span class='ident'>Sink</span>; + <span class='kw'>use</span> <span class='ident'>signal</span>::<span class='ident'>Signal</span>; + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift0</span>() { + <span class='kw'>let</span> <span class='ident'>signal</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>||</span> <span class='number'>3</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>signal</span>.<span class='ident'>sample</span>(), <span class='number'>3</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift1</span>() { + <span class='kw'>let</span> <span class='ident'>sig2</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>n</span><span class='op'>|</span> <span class='ident'>n</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='kw-2'>&</span><span class='ident'>Signal</span>::<span class='ident'>new</span>(<span class='number'>3</span>)); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>sig2</span>.<span class='ident'>sample</span>(), <span class='number'>5</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift2</span>() { + <span class='kw'>let</span> <span class='ident'>sink1</span> <span class='op'>=</span> <span class='ident'>Sink</span>::<span class='ident'>new</span>(); + <span class='kw'>let</span> <span class='ident'>sink2</span> <span class='op'>=</span> <span class='ident'>Sink</span>::<span class='ident'>new</span>(); + <span class='kw'>let</span> <span class='ident'>lifted</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>a</span>, <span class='ident'>b</span><span class='op'>|</span> <span class='ident'>a</span> <span class='op'>+</span> <span class='ident'>b</span>, <span class='kw-2'>&</span><span class='ident'>sink1</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>0</span>), + <span class='kw-2'>&</span><span class='ident'>sink2</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>3</span>)); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>lifted</span>.<span class='ident'>sample</span>(), <span class='number'>3</span>); + <span class='ident'>sink1</span>.<span class='ident'>send</span>(<span class='number'>1</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>lifted</span>.<span class='ident'>sample</span>(), <span class='number'>4</span>); + <span class='ident'>sink2</span>.<span class='ident'>send</span>(<span class='number'>11</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>lifted</span>.<span class='ident'>sample</span>(), <span class='number'>12</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift2_identical</span>() { + <span class='kw'>let</span> <span class='ident'>sig</span> <span class='op'>=</span> <span class='ident'>Signal</span>::<span class='ident'>new</span>(<span class='number'>16</span>); + <span class='kw'>let</span> <span class='ident'>sig2</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>a</span>, <span class='ident'>b</span><span class='op'>|</span> <span class='ident'>a</span> <span class='op'>+</span> <span class='ident'>b</span>, <span class='kw-2'>&</span><span class='ident'>sig</span>, <span class='kw-2'>&</span><span class='ident'>sig</span>); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>sig2</span>.<span class='ident'>sample</span>(), <span class='number'>32</span>); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift3</span>() { + <span class='kw'>let</span> <span class='ident'>sink</span> <span class='op'>=</span> <span class='ident'>Sink</span>::<span class='ident'>new</span>(); + <span class='macro'>assert_eq</span><span class='macro'>!</span>( + <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>x</span>, <span class='ident'>y</span>, <span class='ident'>z</span><span class='op'>|</span> <span class='ident'>x</span> <span class='op'>+</span> <span class='number'>2</span> <span class='op'>*</span> <span class='ident'>y</span> <span class='op'>+</span> <span class='ident'>z</span>, + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>5</span>), + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>3</span>), + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='op'>-</span><span class='number'>4</span>) + ).<span class='ident'>sample</span>(), + <span class='number'>7</span> + ); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift4</span>() { + <span class='kw'>let</span> <span class='ident'>sink</span> <span class='op'>=</span> <span class='ident'>Sink</span>::<span class='ident'>new</span>(); + <span class='macro'>assert_eq</span><span class='macro'>!</span>( + <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>w</span>, <span class='ident'>x</span>, <span class='ident'>y</span>, <span class='ident'>z</span><span class='op'>|</span> <span class='number'>4</span> <span class='op'>*</span> <span class='ident'>w</span> <span class='op'>+</span> <span class='ident'>x</span> <span class='op'>+</span> <span class='number'>2</span> <span class='op'>*</span> <span class='ident'>y</span> <span class='op'>+</span> <span class='ident'>z</span>, + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='op'>-</span><span class='number'>2</span>), + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>5</span>), + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='number'>3</span>), + <span class='kw-2'>&</span><span class='ident'>sink</span>.<span class='ident'>stream</span>().<span class='ident'>hold</span>(<span class='op'>-</span><span class='number'>4</span>) + ).<span class='ident'>sample</span>(), + <span class='op'>-</span><span class='number'>1</span> + ); + } + + <span class='attribute'>#[<span class='ident'>test</span>]</span> + <span class='kw'>fn</span> <span class='ident'>lift0_equal_within_transaction</span>() { + <span class='kw'>use</span> <span class='ident'>rand</span>::<span class='ident'>random</span>; + <span class='comment'>// Generate a completely random signal</span> + <span class='kw'>let</span> <span class='ident'>rnd</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='ident'>random</span>::<span class='op'><</span><span class='ident'>i64</span><span class='op'>></span>); + <span class='comment'>// Make a tuple with itself</span> + <span class='kw'>let</span> <span class='ident'>gather</span> <span class='op'>=</span> <span class='macro'>lift</span><span class='macro'>!</span>(<span class='op'>|</span><span class='ident'>a</span>, <span class='ident'>b</span><span class='op'>|</span> (<span class='ident'>a</span>, <span class='ident'>b</span>), <span class='kw-2'>&</span><span class='ident'>rnd</span>, <span class='kw-2'>&</span><span class='ident'>rnd</span>); + <span class='comment'>// Both components should be equal</span> + <span class='kw'>let</span> (<span class='ident'>a</span>, <span class='ident'>b</span>) <span class='op'>=</span> <span class='ident'>gather</span>.<span class='ident'>sample</span>(); + <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>a</span>, <span class='ident'>b</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 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