| <!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 of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-complex-0.3.1/src/cast.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>cast.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../num_complex/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../num_complex/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::Complex; |
| <span class="kw">use </span>num_traits::{AsPrimitive, FromPrimitive, Num, NumCast, ToPrimitive}; |
| |
| <span class="macro">macro_rules! </span>impl_to_primitive { |
| (<span class="macro-nonterminal">$ty</span>:ty, <span class="macro-nonterminal">$to</span>:ident) => { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span><span class="macro-nonterminal">$to</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="macro-nonterminal">$ty</span>> { |
| <span class="kw">if </span><span class="self">self</span>.im.is_zero() { |
| <span class="self">self</span>.re.<span class="macro-nonterminal">$to</span>() |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| }; |
| } <span class="comment">// impl_to_primitive |
| |
| // Returns None if Complex part is non-zero |
| </span><span class="kw">impl</span><T: ToPrimitive + Num> ToPrimitive <span class="kw">for </span>Complex<T> { |
| <span class="macro">impl_to_primitive!</span>(usize, to_usize); |
| <span class="macro">impl_to_primitive!</span>(isize, to_isize); |
| <span class="macro">impl_to_primitive!</span>(u8, to_u8); |
| <span class="macro">impl_to_primitive!</span>(u16, to_u16); |
| <span class="macro">impl_to_primitive!</span>(u32, to_u32); |
| <span class="macro">impl_to_primitive!</span>(u64, to_u64); |
| <span class="macro">impl_to_primitive!</span>(i8, to_i8); |
| <span class="macro">impl_to_primitive!</span>(i16, to_i16); |
| <span class="macro">impl_to_primitive!</span>(i32, to_i32); |
| <span class="macro">impl_to_primitive!</span>(i64, to_i64); |
| <span class="macro">impl_to_primitive!</span>(u128, to_u128); |
| <span class="macro">impl_to_primitive!</span>(i128, to_i128); |
| <span class="macro">impl_to_primitive!</span>(f32, to_f32); |
| <span class="macro">impl_to_primitive!</span>(f64, to_f64); |
| } |
| |
| <span class="macro">macro_rules! </span>impl_from_primitive { |
| (<span class="macro-nonterminal">$ty</span>:ty, <span class="macro-nonterminal">$from_xx</span>:ident) => { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span><span class="macro-nonterminal">$from_xx</span>(n: <span class="macro-nonterminal">$ty</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> { |
| <span class="prelude-val">Some</span>(Complex { |
| re: T::<span class="macro-nonterminal">$from_xx</span>(n)<span class="question-mark">?</span>, |
| im: T::zero(), |
| }) |
| } |
| }; |
| } <span class="comment">// impl_from_primitive |
| |
| </span><span class="kw">impl</span><T: FromPrimitive + Num> FromPrimitive <span class="kw">for </span>Complex<T> { |
| <span class="macro">impl_from_primitive!</span>(usize, from_usize); |
| <span class="macro">impl_from_primitive!</span>(isize, from_isize); |
| <span class="macro">impl_from_primitive!</span>(u8, from_u8); |
| <span class="macro">impl_from_primitive!</span>(u16, from_u16); |
| <span class="macro">impl_from_primitive!</span>(u32, from_u32); |
| <span class="macro">impl_from_primitive!</span>(u64, from_u64); |
| <span class="macro">impl_from_primitive!</span>(i8, from_i8); |
| <span class="macro">impl_from_primitive!</span>(i16, from_i16); |
| <span class="macro">impl_from_primitive!</span>(i32, from_i32); |
| <span class="macro">impl_from_primitive!</span>(i64, from_i64); |
| <span class="macro">impl_from_primitive!</span>(u128, from_u128); |
| <span class="macro">impl_from_primitive!</span>(i128, from_i128); |
| <span class="macro">impl_from_primitive!</span>(f32, from_f32); |
| <span class="macro">impl_from_primitive!</span>(f64, from_f64); |
| } |
| |
| <span class="kw">impl</span><T: NumCast + Num> NumCast <span class="kw">for </span>Complex<T> { |
| <span class="kw">fn </span>from<U: ToPrimitive>(n: U) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> { |
| <span class="prelude-val">Some</span>(Complex { |
| re: T::from(n)<span class="question-mark">?</span>, |
| im: T::zero(), |
| }) |
| } |
| } |
| |
| <span class="kw">impl</span><T, U> AsPrimitive<U> <span class="kw">for </span>Complex<T> |
| <span class="kw">where |
| </span>T: AsPrimitive<U>, |
| U: <span class="lifetime">'static </span>+ Copy, |
| { |
| <span class="kw">fn </span>as_(<span class="self">self</span>) -> U { |
| <span class="self">self</span>.re.as_() |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_to_primitive() { |
| <span class="kw">let </span>a: Complex<u32> = Complex { re: <span class="number">3</span>, im: <span class="number">0 </span>}; |
| <span class="macro">assert_eq!</span>(a.to_i32(), <span class="prelude-val">Some</span>(<span class="number">3_i32</span>)); |
| <span class="kw">let </span>b: Complex<u32> = Complex { re: <span class="number">3</span>, im: <span class="number">1 </span>}; |
| <span class="macro">assert_eq!</span>(b.to_i32(), <span class="prelude-val">None</span>); |
| <span class="kw">let </span>x: Complex<f32> = Complex { re: <span class="number">1.0</span>, im: <span class="number">0.1 </span>}; |
| <span class="macro">assert_eq!</span>(x.to_f32(), <span class="prelude-val">None</span>); |
| <span class="kw">let </span>y: Complex<f32> = Complex { re: <span class="number">1.0</span>, im: <span class="number">0.0 </span>}; |
| <span class="macro">assert_eq!</span>(y.to_f32(), <span class="prelude-val">Some</span>(<span class="number">1.0</span>)); |
| <span class="kw">let </span>z: Complex<f32> = Complex { re: <span class="number">1.0</span>, im: <span class="number">0.0 </span>}; |
| <span class="macro">assert_eq!</span>(z.to_i32(), <span class="prelude-val">Some</span>(<span class="number">1</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_from_primitive() { |
| <span class="kw">let </span>a: Complex<f32> = FromPrimitive::from_i32(<span class="number">2</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(a, Complex { re: <span class="number">2.0</span>, im: <span class="number">0.0 </span>}); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_num_cast() { |
| <span class="kw">let </span>a: Complex<f32> = NumCast::from(<span class="number">2_i32</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(a, Complex { re: <span class="number">2.0</span>, im: <span class="number">0.0 </span>}); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_as_primitive() { |
| <span class="kw">let </span>a: Complex<f32> = Complex { re: <span class="number">2.0</span>, im: <span class="number">0.2 </span>}; |
| <span class="kw">let </span>a_: i32 = a.as_(); |
| <span class="macro">assert_eq!</span>(a_, <span class="number">2_i32</span>); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="num_complex" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |