| <!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/static_assertions-1.1.0/src/assert_trait.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>assert_trait.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="../../static_assertions/index.html"><div class="logo-container"> |
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| <img src="https://raw.githubusercontent.com/nvzqz/static-assertions-rs/assets/Icon.png" 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="doccomment">/// Asserts that the trait is a child of all of the other traits. |
| /// |
| /// Related: |
| /// - [`assert_trait_super_all!`] |
| /// |
| /// # Examples |
| /// |
| /// All types that implement [`Copy`] must implement [`Clone`]: |
| /// |
| /// ``` |
| /// # #[macro_use] extern crate static_assertions; fn main() {} |
| /// assert_trait_sub_all!(Copy: Clone); |
| /// ``` |
| /// |
| /// All types that implement [`Ord`] must implement [`PartialEq`], [`Eq`], and |
| /// [`PartialOrd`]: |
| /// |
| /// ``` |
| /// # #[macro_use] extern crate static_assertions; fn main() {} |
| /// assert_trait_sub_all!(Ord: PartialEq, Eq, PartialOrd); |
| /// ``` |
| /// |
| /// The following example fails to compile because [`Eq`] is not required for |
| /// [`PartialOrd`]: |
| /// |
| /// ```compile_fail |
| /// # #[macro_use] extern crate static_assertions; fn main() {} |
| /// assert_trait_sub_all!(PartialOrd: Eq); |
| /// ``` |
| /// |
| /// [`assert_trait_super_all!`]: macro.assert_trait_super_all.html |
| /// |
| /// [`Copy`]: https://doc.rust-lang.org/std/marker/trait.Copy.html |
| /// [`Clone`]: https://doc.rust-lang.org/std/clone/trait.Clone.html |
| /// [`Ord`]: https://doc.rust-lang.org/std/cmp/trait.Ord.html |
| /// [`PartialOrd`]: https://doc.rust-lang.org/std/cmp/trait.PartialOrd.html |
| /// [`Eq`]: https://doc.rust-lang.org/std/cmp/trait.Eq.html |
| /// [`PartialEq`]: https://doc.rust-lang.org/std/cmp/trait.PartialEq.html |
| </span><span class="attribute">#[macro_export] |
| </span><span class="macro">macro_rules! </span>assert_trait_sub_all { |
| (<span class="macro-nonterminal">$sub</span>:path: $(<span class="macro-nonterminal">$</span><span class="kw">super</span>:<span class="macro-nonterminal">path</span>),+ $(,)<span class="question-mark">?</span>) => { |
| <span class="kw">const _</span>: () = { |
| <span class="comment">// One scope per super-trait. |
| </span>$({ |
| <span class="attribute">#[allow(non_camel_case_types)] |
| </span><span class="kw">trait </span>__Impl_Implication: <span class="macro-nonterminal">$</span><span class="kw">super </span>{} |
| |
| <span class="comment">// Can only be implemented for `$sub` types if `$super` is |
| // also implemented. |
| </span><span class="kw">impl</span><<span class="macro-nonterminal">T</span>: <span class="macro-nonterminal">$sub</span>> __Impl_Implication <span class="kw">for </span>T {} |
| })+ |
| }; |
| }; |
| } |
| |
| <span class="doccomment">/// Asserts that the trait is a parent of all of the other traits. |
| /// |
| /// Related: |
| /// - [`assert_trait_sub_all!`] |
| /// |
| /// # Examples |
| /// |
| /// With this, traits `A` and `B` can both be tested to require [`Copy`] on a |
| /// single line: |
| /// |
| /// ``` |
| /// # use static_assertions::assert_trait_super_all; |
| /// trait A: Copy {} |
| /// trait B: Copy {} |
| /// |
| /// assert_trait_super_all!(Copy: A, B); |
| /// ``` |
| /// |
| /// Otherwise, each sub-trait would require its own call to |
| /// [`assert_trait_sub_all!`]: |
| /// |
| /// ``` |
| /// # #[macro_use] extern crate static_assertions; fn main() {} |
| /// # trait A: Copy {} |
| /// # trait B: Copy {} |
| /// assert_trait_sub_all!(A: Copy); |
| /// assert_trait_sub_all!(B: Copy); |
| /// ``` |
| /// |
| /// The following example fails to compile because trait `C` does not require |
| /// [`Copy`]: |
| /// |
| /// ```compile_fail |
| /// # use static_assertions::assert_trait_super_all; |
| /// # trait A: Copy {} |
| /// # trait B: Copy {} |
| /// trait C {} |
| /// |
| /// assert_trait_super_all!(Copy: A, B, C); |
| /// ``` |
| /// |
| /// [`assert_trait_sub_all!`]: macro.assert_trait_sub_all.html |
| /// |
| /// [`Copy`]: https://doc.rust-lang.org/std/marker/trait.Copy.html |
| </span><span class="attribute">#[macro_export(local_inner_macros)] |
| </span><span class="macro">macro_rules! </span>assert_trait_super_all { |
| (<span class="macro-nonterminal">$</span><span class="kw">super</span>:<span class="macro-nonterminal">path</span>: $(<span class="macro-nonterminal">$sub</span>:path),+ $(,)<span class="question-mark">?</span>) => { |
| $(<span class="macro">assert_trait_sub_all!</span>(<span class="macro-nonterminal">$sub</span>: <span class="macro-nonterminal">$</span><span class="kw">super</span>);)+ |
| }; |
| } |
| </code></pre></div> |
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