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+<!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 `/home/pico/.local/share/cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.138/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"></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"><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></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]&#39;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)*
+ }) =&gt; {
+ <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)* }
+ )*
+ ) =&gt; {
+ <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">$not</span>:meta,)<span class="kw-2">*</span>) ; ) =&gt; {};
+ (@__items ($(<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>) =&gt; {
+ <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>) =&gt; {
+ $(<span class="attribute">#[<span class="macro-nonterminal">$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>) =&gt; ($(
+ <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)* }) =&gt; (
+ <span class="macro">compile_error!</span>(<span class="string">&quot;unions cannot derive extra traits, use s_no_extra_traits instead&quot;</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)* }) =&gt; (
+ <span class="macro">__item! </span>{
+ <span class="attribute">#[repr(C)]
+ #[cfg_attr(feature = <span class="string">&quot;extra_traits&quot;</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">&amp;</span><span class="self">self</span>) -&gt; <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>) =&gt; ($(
+ <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)* }) =&gt; (
+ <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">&amp;</span><span class="self">self</span>) -&gt; <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)* }) =&gt; (
+ <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">&amp;</span><span class="self">self</span>) -&gt; <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>) =&gt; ($(
+ <span class="macro">__item! </span>{
+ <span class="attribute">#[cfg_attr(feature = <span class="string">&quot;extra_traits&quot;</span>, derive(Debug, Eq, Hash, PartialEq))]
+ </span>$(<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">&amp;</span><span class="self">self</span>) -&gt; <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)* ); )* ) =&gt; ($(
+ <span class="macro">__item! </span>{
+ <span class="attribute">#[cfg_attr(feature = <span class="string">&quot;extra_traits&quot;</span>, derive(Debug, Eq, Hash, PartialEq))]
+ </span>$(<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">&amp;</span><span class="self">self</span>) -&gt; <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>}
+ }
+ )<span class="kw-2">*</span>);
+}
+
+<span class="comment">// This is a pretty horrible hack to allow us to conditionally mark
+// some functions as &#39;const&#39;, without requiring users of this macro
+// to care about the &quot;const-extern-fn&quot; feature.
+//
+// When &#39;const-extern-fn&#39; is enabled, we emit the captured &#39;const&#39; keyword
+// in the expanded function.
+//
+// When &#39;const-extern-fn&#39; is disabled, we always emit a plain &#39;pub unsafe extern fn&#39;.
+// Note that the expression matched by the macro is exactly the same - this allows
+// users of this macro to work whether or not &#39;const-extern-fn&#39; is enabled
+//
+// Unfortunately, we need to duplicate most of this macro between the &#39;cfg_if&#39; blocks.
+// This is because &#39;const unsafe extern fn&#39; won&#39;t even parse on older compilers,
+// so we need to avoid emitting it at all of &#39;const-extern-fn&#39;.
+//
+// Specifically, moving the &#39;cfg_if&#39; into the macro body will *not* work.
+// Doing so would cause the &#39;#[cfg(feature = &quot;const-extern-fn&quot;)]&#39; to be emitted
+// into user code. The &#39;cfg&#39; gate will not stop Rust from trying to parse the
+// &#39;pub const unsafe extern fn&#39;, so users would get a compiler error even when
+// the &#39;const-extern-fn&#39; feature is disabled
+//
+// Note that users of this macro need to place &#39;const&#39; in a weird position
+// (after the closing &#39;)&#39; for the arguments, but before the return type).
+// This was the only way I could satisfy the following two requirements:
+// 1. Avoid ambiguity errors from &#39;macro_rules!&#39; (which happen when writing &#39;$foo:ident fn&#39;
+// 2. Allow users of this macro to mix &#39;pub fn foo&#39; and &#39;pub const fn bar&#39; within the same
+// &#39;f!&#39; 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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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">$argty</span>),*
+ ) -&gt; <span class="macro-nonterminal">$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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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">$argty</span>),*
+ ) -&gt; <span class="macro-nonterminal">$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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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>),*
+ ) -&gt; <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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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">$argty</span>),*
+ ) -&gt; <span class="macro-nonterminal">$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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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">$argty</span>),*
+ ) -&gt; <span class="macro-nonterminal">$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">$argty</span>:ty),*
+ ) -&gt; <span class="macro-nonterminal">$ret</span>:ty {
+ $(<span class="macro-nonterminal">$body</span>:stmt);*
+ })<span class="kw-2">*</span>) =&gt; ($(
+ <span class="attribute">#[inline]
+ </span>$(<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">$argty</span>),*
+ ) -&gt; <span class="macro-nonterminal">$ret </span>{
+ $(<span class="macro-nonterminal">$body</span>);*
+ }
+ )<span class="kw-2">*</span>)
+ }
+ }
+}
+
+<span class="macro">macro_rules! </span>__item {
+ (<span class="macro-nonterminal">$i</span>:item) =&gt; {
+ <span class="macro-nonterminal">$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>) =&gt; ($(
+ <span class="attribute">#[cfg(libc_align)]
+ </span>$(<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">$expr</span>:expr;) =&gt; {
+ <span class="attribute">#[deprecated(
+ since = <span class="string">&quot;0.2.55&quot;</span>,
+ note = <span class="string">&quot;Use the `mach2` crate instead&quot;</span>,
+ )]
+ #[allow(deprecated)]
+ </span><span class="kw">pub const </span><span class="macro-nonterminal">$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>) =&gt; {
+ $(
+ <span class="macro">deprecated_mach!</span>(
+ <span class="kw">pub const </span><span class="macro-nonterminal">$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;) =&gt; {
+ <span class="attribute">#[deprecated(
+ since = <span class="string">&quot;0.2.55&quot;</span>,
+ note = <span class="string">&quot;Use the `mach2` crate instead&quot;</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>) =&gt; {
+ $(
+ <span class="macro">deprecated_mach!</span>(
+ <span class="kw">pub type </span><span class="macro-nonterminal">$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) =&gt; {
+ <span class="kw-2">&amp;</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) =&gt; {
+ <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 (69f9c33d7 2022-12-12) (Arch Linux rust 1:1.66.0-1)" ></div></body></html> \ No newline at end of file