| <!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/libc-0.2.145/src/macros.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>macros.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="../../libc/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="../../libc/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="doccomment">/// A macro for defining #[cfg] if-else statements. |
| /// |
| /// This is similar to the `if/elif` C preprocessor macro by allowing definition |
| /// of a cascade of `#[cfg]` cases, emitting the implementation which matches |
| /// first. |
| /// |
| /// This allows you to conveniently provide a long list #[cfg]'d blocks of code |
| /// without having to rewrite each clause multiple times. |
| </span><span class="macro">macro_rules! </span>cfg_if { |
| <span class="comment">// match if/else chains with a final `else` |
| </span>($( |
| <span class="kw">if </span><span class="attribute">#[cfg($(<span class="macro-nonterminal">$meta</span>:meta),<span class="kw-2">*</span>)] </span>{ $(<span class="macro-nonterminal">$it</span>:item)* } |
| ) <span class="kw">else </span>* <span class="kw">else </span>{ |
| $(<span class="macro-nonterminal">$it2</span>:item)* |
| }) => { |
| <span class="macro">cfg_if! </span>{ |
| @__items |
| () ; |
| $( ( ($(<span class="macro-nonterminal">$meta</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$it</span>)<span class="kw-2">*</span>) ), )* |
| ( () ($(<span class="macro-nonterminal">$it2</span>)<span class="kw-2">*</span>) ), |
| } |
| }; |
| |
| <span class="comment">// match if/else chains lacking a final `else` |
| </span>( |
| <span class="kw">if </span><span class="attribute">#[cfg($(<span class="macro-nonterminal">$i_met</span>:meta),<span class="kw-2">*</span>)] </span>{ $(<span class="macro-nonterminal">$i_it</span>:item)* } |
| $( |
| <span class="kw">else if </span><span class="attribute">#[cfg($(<span class="macro-nonterminal">$e_met</span>:meta),<span class="kw-2">*</span>)] </span>{ $(<span class="macro-nonterminal">$e_it</span>:item)* } |
| )* |
| ) => { |
| <span class="macro">cfg_if! </span>{ |
| @__items |
| () ; |
| ( ($(<span class="macro-nonterminal">$i_met</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$i_it</span>)<span class="kw-2">*</span>) ), |
| $( ( ($(<span class="macro-nonterminal">$e_met</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$e_it</span>)<span class="kw-2">*</span>) ), )* |
| ( () () ), |
| } |
| }; |
| |
| <span class="comment">// Internal and recursive macro to emit all the items |
| // |
| // Collects all the negated `cfg`s in a list at the beginning and after the |
| // semicolon is all the remaining items |
| </span>(@__items ($(<span class="macro-nonterminal">$not</span>:meta,)<span class="kw-2">*</span>) ; ) => {}; |
| (@__items ($(<span class="macro-nonterminal">$not</span>:meta,)<span class="kw-2">*</span>) ; ( ($(<span class="macro-nonterminal">$m</span>:meta),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$it</span>:item)<span class="kw-2">*</span>) ), |
| $(<span class="macro-nonterminal">$rest</span>:tt)<span class="kw-2">*</span>) => { |
| <span class="comment">// Emit all items within one block, applying an appropriate #[cfg]. The |
| // #[cfg] will require all `$m` matchers specified and must also negate |
| // all previous matchers. |
| </span><span class="macro">cfg_if! </span>{ @__apply cfg(all($(<span class="macro-nonterminal">$m</span>,)* not(any($(<span class="macro-nonterminal">$not</span>),<span class="kw-2">*</span>)))), $(<span class="macro-nonterminal">$it</span>)* } |
| |
| <span class="comment">// Recurse to emit all other items in `$rest`, and when we do so add all |
| // our `$m` matchers to the list of `$not` matchers as future emissions |
| // will have to negate everything we just matched as well. |
| </span><span class="macro">cfg_if! </span>{ @__items ($(<span class="macro-nonterminal">$not</span>,)* $(<span class="macro-nonterminal">$m</span>,)<span class="kw-2">*</span>) ; $(<span class="macro-nonterminal">$rest</span>)* } |
| }; |
| |
| <span class="comment">// Internal macro to Apply a cfg attribute to a list of items |
| </span>(@__apply <span class="macro-nonterminal">$m</span>:meta, $(<span class="macro-nonterminal">$it</span>:item)<span class="kw-2">*</span>) => { |
| $(<span class="attribute">#[<span class="macro-nonterminal">$m</span>] </span><span class="macro-nonterminal">$it</span>)* |
| }; |
| } |
| |
| <span class="macro">macro_rules! </span>s { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span><span class="macro-nonterminal">$t</span>:ident <span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* })<span class="kw-2">*</span>) => ($( |
| <span class="macro">s!</span>(it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* <span class="kw">pub </span><span class="macro-nonterminal">$t $i </span>{ $(<span class="macro-nonterminal">$field</span>)* }); |
| )<span class="kw-2">*</span>); |
| (it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>union <span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* }) => ( |
| <span class="macro">compile_error!</span>(<span class="string">"unions cannot derive extra traits, use s_no_extra_traits instead"</span>); |
| ); |
| (it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub struct </span><span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* }) => ( |
| <span class="macro">__item! </span>{ |
| <span class="attribute">#[repr(C)] |
| #[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))] |
| #[allow(deprecated)] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub struct </span><span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* } |
| } |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{} |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{ |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>} |
| } |
| ); |
| } |
| |
| <span class="macro">macro_rules! </span>s_no_extra_traits { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span><span class="macro-nonterminal">$t</span>:ident <span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* })<span class="kw-2">*</span>) => ($( |
| <span class="macro">s_no_extra_traits!</span>(it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* <span class="kw">pub </span><span class="macro-nonterminal">$t $i </span>{ $(<span class="macro-nonterminal">$field</span>)* }); |
| )<span class="kw-2">*</span>); |
| (it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>union <span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* }) => ( |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(libc_union)] </span>{ |
| <span class="macro">__item! </span>{ |
| <span class="attribute">#[repr(C)] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub </span>union <span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* } |
| } |
| |
| <span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{} |
| <span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{ |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>} |
| } |
| } |
| } |
| ); |
| (it: $(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub struct </span><span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* }) => ( |
| <span class="macro">__item! </span>{ |
| <span class="attribute">#[repr(C)] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub struct </span><span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* } |
| } |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{} |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{ |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>} |
| } |
| ); |
| } |
| |
| <span class="macro">macro_rules! </span>e { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub enum </span><span class="macro-nonterminal">$i</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* })<span class="kw-2">*</span>) => ($( |
| <span class="macro">__item! </span>{ |
| <span class="attribute">#[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub enum </span><span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* } |
| } |
| <span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{} |
| <span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{ |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>} |
| } |
| )<span class="kw-2">*</span>); |
| } |
| |
| <span class="macro">macro_rules! </span>s_paren { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub struct </span><span class="macro-nonterminal">$i</span>:ident ( $(<span class="macro-nonterminal">$field</span>:tt)* ); )* ) => ($( |
| <span class="macro">__item! </span>{ |
| <span class="attribute">#[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub struct </span><span class="macro-nonterminal">$i </span>( $(<span class="macro-nonterminal">$field</span>)* ); |
| } |
| <span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{} |
| <span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{ |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>} |
| } |
| )<span class="kw-2">*</span>); |
| } |
| |
| <span class="comment">// This is a pretty horrible hack to allow us to conditionally mark |
| // some functions as 'const', without requiring users of this macro |
| // to care about the "const-extern-fn" feature. |
| // |
| // When 'const-extern-fn' is enabled, we emit the captured 'const' keyword |
| // in the expanded function. |
| // |
| // When 'const-extern-fn' is disabled, we always emit a plain 'pub unsafe extern fn'. |
| // Note that the expression matched by the macro is exactly the same - this allows |
| // users of this macro to work whether or not 'const-extern-fn' is enabled |
| // |
| // Unfortunately, we need to duplicate most of this macro between the 'cfg_if' blocks. |
| // This is because 'const unsafe extern fn' won't even parse on older compilers, |
| // so we need to avoid emitting it at all of 'const-extern-fn'. |
| // |
| // Specifically, moving the 'cfg_if' into the macro body will *not* work. |
| // Doing so would cause the '#[cfg(feature = "const-extern-fn")]' to be emitted |
| // into user code. The 'cfg' gate will not stop Rust from trying to parse the |
| // 'pub const unsafe extern fn', so users would get a compiler error even when |
| // the 'const-extern-fn' feature is disabled |
| // |
| // Note that users of this macro need to place 'const' in a weird position |
| // (after the closing ')' for the arguments, but before the return type). |
| // This was the only way I could satisfy the following two requirements: |
| // 1. Avoid ambiguity errors from 'macro_rules!' (which happen when writing '$foo:ident fn' |
| // 2. Allow users of this macro to mix 'pub fn foo' and 'pub const fn bar' within the same |
| // 'f!' block |
| </span><span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(libc_const_extern_fn)] </span>{ |
| <span class="macro">macro_rules! </span>f { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>$({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub </span>$(<span class="macro-nonterminal">$constness</span>)* <span class="kw">unsafe extern fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="macro">macro_rules! </span>safe_f { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>$({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub </span>$(<span class="macro-nonterminal">$constness</span>)* <span class="kw">extern fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="macro">macro_rules! </span>const_fn { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* $({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| $(<span class="macro-nonterminal">$constness</span>)* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| } <span class="kw">else </span>{ |
| <span class="macro">macro_rules! </span>f { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>$({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub unsafe extern fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="macro">macro_rules! </span>safe_f { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub </span>$({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub extern fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="macro">macro_rules! </span>const_fn { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* $({<span class="macro-nonterminal">$constness</span>:ident})* <span class="kw">fn </span><span class="macro-nonterminal">$i</span>:ident( |
| $(<span class="macro-nonterminal">$arg</span>:ident: <span class="macro-nonterminal">$argty</span>:ty),* |
| ) -> <span class="macro-nonterminal">$ret</span>:ty { |
| $(<span class="macro-nonterminal">$body</span>:stmt);* |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[inline] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">fn </span><span class="macro-nonterminal">$i</span>($(<span class="macro-nonterminal">$arg</span>: <span class="macro-nonterminal">$argty</span>),* |
| ) -> <span class="macro-nonterminal">$ret </span>{ |
| $(<span class="macro-nonterminal">$body</span>);* |
| } |
| )<span class="kw-2">*</span>) |
| } |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>__item { |
| (<span class="macro-nonterminal">$i</span>:item) => { |
| <span class="macro-nonterminal">$i |
| </span>}; |
| } |
| |
| <span class="macro">macro_rules! </span>align_const { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* |
| <span class="kw">pub const </span><span class="macro-nonterminal">$name</span>:ident : <span class="macro-nonterminal">$t1</span>:ty |
| = <span class="macro-nonterminal">$t2</span>:ident { $(<span class="macro-nonterminal">$field</span>:tt)* };)<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[cfg(libc_align)] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub const </span><span class="macro-nonterminal">$name </span>: <span class="macro-nonterminal">$t1 </span>= <span class="macro-nonterminal">$t2 </span>{ |
| $(<span class="macro-nonterminal">$field</span>)* |
| }; |
| <span class="attribute">#[cfg(not(libc_align))] |
| </span>$(<span class="attribute">#[<span class="macro-nonterminal">$attr</span>]</span>)* |
| <span class="kw">pub const </span><span class="macro-nonterminal">$name </span>: <span class="macro-nonterminal">$t1 </span>= <span class="macro-nonterminal">$t2 </span>{ |
| $(<span class="macro-nonterminal">$field</span>)* |
| __align: [], |
| }; |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="comment">// This macro is used to deprecate items that should be accessed via the mach2 crate |
| </span><span class="macro">macro_rules! </span>deprecated_mach { |
| (<span class="kw">pub const </span><span class="macro-nonterminal">$id</span>:ident: <span class="macro-nonterminal">$ty</span>:ty = <span class="macro-nonterminal">$expr</span>:expr;) => { |
| <span class="attribute">#[deprecated( |
| since = <span class="string">"0.2.55"</span>, |
| note = <span class="string">"Use the `mach2` crate instead"</span>, |
| )] |
| #[allow(deprecated)] |
| </span><span class="kw">pub const </span><span class="macro-nonterminal">$id</span>: <span class="macro-nonterminal">$ty </span>= <span class="macro-nonterminal">$expr</span>; |
| }; |
| ($(<span class="kw">pub const </span><span class="macro-nonterminal">$id</span>:ident: <span class="macro-nonterminal">$ty</span>:ty = <span class="macro-nonterminal">$expr</span>:expr;)<span class="kw-2">*</span>) => { |
| $( |
| <span class="macro">deprecated_mach!</span>( |
| <span class="kw">pub const </span><span class="macro-nonterminal">$id</span>: <span class="macro-nonterminal">$ty </span>= <span class="macro-nonterminal">$expr</span>; |
| ); |
| )* |
| }; |
| (<span class="kw">pub type </span><span class="macro-nonterminal">$id</span>:ident = <span class="macro-nonterminal">$ty</span>:ty;) => { |
| <span class="attribute">#[deprecated( |
| since = <span class="string">"0.2.55"</span>, |
| note = <span class="string">"Use the `mach2` crate instead"</span>, |
| )] |
| #[allow(deprecated)] |
| </span><span class="kw">pub type </span><span class="macro-nonterminal">$id </span>= <span class="macro-nonterminal">$ty</span>; |
| }; |
| ($(<span class="kw">pub type </span><span class="macro-nonterminal">$id</span>:ident = <span class="macro-nonterminal">$ty</span>:ty;)<span class="kw-2">*</span>) => { |
| $( |
| <span class="macro">deprecated_mach!</span>( |
| <span class="kw">pub type </span><span class="macro-nonterminal">$id </span>= <span class="macro-nonterminal">$ty</span>; |
| ); |
| )* |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(libc_ptr_addr_of))] |
| </span><span class="macro">macro_rules! </span>ptr_addr_of { |
| (<span class="macro-nonterminal">$place</span>:expr) => { |
| <span class="kw-2">&</span><span class="macro-nonterminal">$place |
| </span>}; |
| } |
| |
| <span class="attribute">#[cfg(libc_ptr_addr_of)] |
| </span><span class="macro">macro_rules! </span>ptr_addr_of { |
| (<span class="macro-nonterminal">$place</span>:expr) => { |
| <span class="macro">::core::ptr::addr_of!</span>(<span class="macro-nonterminal">$place</span>) |
| }; |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="libc" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
