<!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/tan/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/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="../../static.files/SourceSerif4-Regular-1f7d512b176f0f72.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-124a1ca42af929b6.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-6827029ac823cab7.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../../static.files/light-ebce58d0a40c3431.css"><link rel="stylesheet" disabled href="../../static.files/dark-f23faae4a2daf9a6.css"><link rel="stylesheet" disabled href="../../static.files/ayu-8af5e100b21cd173.css"><script id="default-settings" ></script><script src="../../static.files/storage-d43fa987303ecbbb.js"></script><script defer src="../../static.files/source-script-5cf2e01a42cc9858.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-c55e1eb52e1886b4.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-13285aec31fa243e.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.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="../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" 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="../../static.files/wheel-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><a href="#1" id="1">1</a>
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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>($(
<span class="kw">if </span><span class="attr">#[cfg($(<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">$it2</span>)<span class="kw-2">*</span>) ),
}
};
<span class="comment">// match if/else chains lacking a final `else`
</span>(
<span class="kw">if </span><span class="attr">#[cfg($(<span class="macro-nonterminal">$i_met</span>:meta),<span class="kw-2">*</span>)] </span>{ $(<span class="macro-nonterminal">$i_it</span>:item)* }
$(
<span class="kw">else if </span><span class="attr">#[cfg($(<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>) => {
$(<span class="attr">#[<span class="macro-nonterminal">$m</span>] </span><span class="macro-nonterminal">$it</span>)*
};
}
<span class="macro">macro_rules! </span>s {
($($(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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="attr">#[repr(C)]
#[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))]
#[allow(deprecated)]
</span>$(<span class="attr">#[<span class="macro-nonterminal">$attr</span>]</span>)*
<span class="kw">pub struct </span><span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* }
}
<span class="attr">#[allow(deprecated)]
</span><span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{}
<span class="attr">#[allow(deprecated)]
</span><span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{
<span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>}
}
);
}
<span class="macro">macro_rules! </span>s_no_extra_traits {
($($(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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="attr">#[cfg(libc_union)] </span>{
<span class="macro">__item! </span>{
<span class="attr">#[repr(C)]
</span>$(<span class="attr">#[<span class="macro-nonterminal">$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: $(<span class="attr">#[<span class="macro-nonterminal">$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="attr">#[repr(C)]
</span>$(<span class="attr">#[<span class="macro-nonterminal">$attr</span>]</span>)*
<span class="kw">pub struct </span><span class="macro-nonterminal">$i </span>{ $(<span class="macro-nonterminal">$field</span>)* }
}
<span class="attr">#[allow(deprecated)]
</span><span class="kw">impl </span>::Copy <span class="kw">for </span><span class="macro-nonterminal">$i </span>{}
<span class="attr">#[allow(deprecated)]
</span><span class="kw">impl </span>::Clone <span class="kw">for </span><span class="macro-nonterminal">$i </span>{
<span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>}
}
);
}
<span class="macro">macro_rules! </span>e {
($($(<span class="attr">#[<span class="macro-nonterminal">$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>) => ($(
<span class="macro">__item! </span>{
<span class="attr">#[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))]
</span>$(<span class="attr">#[<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">$i </span>{ <span class="kw-2">*</span><span class="self">self </span>}
}
)<span class="kw-2">*</span>);
}
<span class="macro">macro_rules! </span>s_paren {
($($(<span class="attr">#[<span class="macro-nonterminal">$attr</span>:meta]</span>)* <span class="kw">pub struct </span><span class="macro-nonterminal">$i</span>:ident ( $(<span class="macro-nonterminal">$field</span>:tt)* ); )* ) => ($(
<span class="macro">__item! </span>{
<span class="attr">#[cfg_attr(feature = <span class="string">"extra_traits"</span>, derive(Debug, Eq, Hash, PartialEq))]
</span>$(<span class="attr">#[<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="attr">#[cfg(libc_const_extern_fn)] </span>{
<span class="macro">macro_rules! </span>f {
($($(<span class="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[inline]
</span>$(<span class="attr">#[<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="attr">#[<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>) => ($(
<span class="attr">#[cfg(libc_align)]
</span>$(<span class="attr">#[<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="attr">#[cfg(not(libc_align))]
</span>$(<span class="attr">#[<span class="macro-nonterminal">$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">$expr</span>:expr;) => {
<span class="attr">#[deprecated(
since = <span class="string">"0.2.55"</span>,
note = <span class="string">"Use the `mach2` crate instead"</span>,
)]
#[allow(deprecated)]
</span><span class="kw">pub const </span><span class="macro-nonterminal">$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="attr">#[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">$ty</span>;
);
)*
}
}
<span class="attr">#[cfg(not(libc_ptr_addr_of))]
</span><span class="macro">macro_rules! </span>ptr_addr_of {
(<span class="macro-nonterminal">$place</span>:expr) => {
<span class="kw-2">&</span><span class="macro-nonterminal">$place
</span>};
}
<span class="attr">#[cfg(libc_ptr_addr_of)]
</span><span class="macro">macro_rules! </span>ptr_addr_of {
(<span class="macro-nonterminal">$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-static-root-path="../../static.files/" data-current-crate="libc" data-themes="" data-resource-suffix="" data-rustdoc-version="1.67.0 (fc594f156 2023-01-24)" data-search-js="search-444266647c4dba98.js" data-settings-js="settings-bebeae96e00e4617.js" data-settings-css="settings-af96d9e2fc13e081.css" ></div></body></html>