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| </pre><pre class="rust"><code><span class="doccomment">/// A macro for defining #[cfg] if-else statements.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This is similar to the `if/elif` C preprocessor macro by allowing definition</span> |
| <span class="doccomment">/// of a cascade of `#[cfg]` cases, emitting the implementation which matches</span> |
| <span class="doccomment">/// first.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This allows you to conveniently provide a long list #[cfg]'d blocks of code</span> |
| <span class="doccomment">/// without having to rewrite each clause multiple times.</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">cfg_if</span> { |
| <span class="comment">// match if/else chains with a final `else`</span> |
| ($( |
| <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>),<span class="kw-2">*</span>)]</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>:<span class="ident">item</span>)<span class="op">*</span> } |
| ) <span class="kw">else</span> <span class="op">*</span> <span class="kw">else</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it2</span>:<span class="ident">item</span>)<span class="op">*</span> |
| }) => { |
| <span class="macro">cfg_if!</span> { |
| @<span class="ident">__items</span> |
| () ; |
| $( ( ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>)<span class="kw-2">*</span>) ), )<span class="op">*</span> |
| ( () ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it2</span>)<span class="kw-2">*</span>) ), |
| } |
| }; |
| |
| <span class="comment">// match if/else chains lacking a final `else`</span> |
| ( |
| <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i_met</span>:<span class="ident">meta</span>),<span class="kw-2">*</span>)]</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i_it</span>:<span class="ident">item</span>)<span class="op">*</span> } |
| $( |
| <span class="kw">else</span> <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e_met</span>:<span class="ident">meta</span>),<span class="kw-2">*</span>)]</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e_it</span>:<span class="ident">item</span>)<span class="op">*</span> } |
| )<span class="op">*</span> |
| ) => { |
| <span class="macro">cfg_if!</span> { |
| @<span class="ident">__items</span> |
| () ; |
| ( ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i_met</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i_it</span>)<span class="kw-2">*</span>) ), |
| $( ( ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e_met</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e_it</span>)<span class="kw-2">*</span>) ), )<span class="op">*</span> |
| ( () () ), |
| } |
| }; |
| |
| <span class="comment">// Internal and recursive macro to emit all the items</span> |
| <span class="comment">//</span> |
| <span class="comment">// Collects all the negated `cfg`s in a list at the beginning and after the</span> |
| <span class="comment">// semicolon is all the remaining items</span> |
| (@<span class="ident">__items</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">not</span>:<span class="ident">meta</span>,)<span class="kw-2">*</span>) ; ) => {}; |
| (@<span class="ident">__items</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">not</span>:<span class="ident">meta</span>,)<span class="kw-2">*</span>) ; ( ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">meta</span>),<span class="kw-2">*</span>) ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>:<span class="ident">item</span>)<span class="kw-2">*</span>) ), |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">rest</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) => { |
| <span class="comment">// Emit all items within one block, applying an appropriate #[cfg]. The</span> |
| <span class="comment">// #[cfg] will require all `$m` matchers specified and must also negate</span> |
| <span class="comment">// all previous matchers.</span> |
| <span class="macro">cfg_if!</span> { @<span class="ident">__apply</span> <span class="ident">cfg</span>(<span class="ident">all</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>,)<span class="op">*</span> <span class="ident">not</span>(<span class="ident">any</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">not</span>),<span class="kw-2">*</span>)))), $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>)<span class="op">*</span> } |
| |
| <span class="comment">// Recurse to emit all other items in `$rest`, and when we do so add all</span> |
| <span class="comment">// our `$m` matchers to the list of `$not` matchers as future emissions</span> |
| <span class="comment">// will have to negate everything we just matched as well.</span> |
| <span class="macro">cfg_if!</span> { @<span class="ident">__items</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">not</span>,)<span class="op">*</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>,)<span class="kw-2">*</span>) ; $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">rest</span>)<span class="op">*</span> } |
| }; |
| |
| <span class="comment">// Internal macro to Apply a cfg attribute to a list of items</span> |
| (@<span class="ident">__apply</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">meta</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>:<span class="ident">item</span>)<span class="kw-2">*</span>) => { |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>]</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">it</span>)<span class="op">*</span> |
| }; |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">s</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> })<span class="kw-2">*</span>) => ($( |
| <span class="macro">s!</span>(<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> }); |
| )<span class="kw-2">*</span>); |
| (<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="ident">union</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> }) => ( |
| <span class="macro">compile_error!</span>(<span class="string">"unions cannot derive extra traits, use s_no_extra_traits instead"</span>); |
| ); |
| (<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> }) => ( |
| <span class="macro">__item!</span> { |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra_traits"</span>, <span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>))]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> } |
| } |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">::Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> {} |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">::Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { <span class="kw-2">*</span><span class="self">self</span> } |
| } |
| ); |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">s_no_extra_traits</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> })<span class="kw-2">*</span>) => ($( |
| <span class="macro">s_no_extra_traits!</span>(<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> }); |
| )<span class="kw-2">*</span>); |
| (<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="ident">union</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> }) => ( |
| <span class="macro">cfg_if!</span> { |
| <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">libc_union</span>)]</span> { |
| <span class="macro">__item!</span> { |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="ident">union</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">::Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> {} |
| <span class="kw">impl</span> <span class="ident">::Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { <span class="kw-2">*</span><span class="self">self</span> } |
| } |
| } |
| } |
| ); |
| (<span class="ident">it</span>: $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> }) => ( |
| <span class="macro">__item!</span> { |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> } |
| } |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">::Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> {} |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">::Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { <span class="kw-2">*</span><span class="self">self</span> } |
| } |
| ); |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">e</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> })<span class="kw-2">*</span>) => ($( |
| <span class="macro">__item!</span> { |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra_traits"</span>, <span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>))]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> } |
| } |
| <span class="kw">impl</span> <span class="ident">::Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> {} |
| <span class="kw">impl</span> <span class="ident">::Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { <span class="kw-2">*</span><span class="self">self</span> } |
| } |
| )<span class="kw-2">*</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">s_paren</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span> ( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> ); )<span class="op">*</span> ) => ($( |
| <span class="macro">__item!</span> { |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra_traits"</span>, <span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>))]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> ( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> ); |
| } |
| <span class="kw">impl</span> <span class="ident">::Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> {} |
| <span class="kw">impl</span> <span class="ident">::Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="macro-nonterminal">$</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</span> |
| <span class="comment">// some functions as 'const', without requiring users of this macro</span> |
| <span class="comment">// to care about the "const-extern-fn" feature.</span> |
| <span class="comment">//</span> |
| <span class="comment">// When 'const-extern-fn' is enabled, we emit the captured 'const' keyword</span> |
| <span class="comment">// in the expanded function.</span> |
| <span class="comment">//</span> |
| <span class="comment">// When 'const-extern-fn' is disabled, we always emit a plain 'pub unsafe extern fn'.</span> |
| <span class="comment">// Note that the expression matched by the macro is exactly the same - this allows</span> |
| <span class="comment">// users of this macro to work whether or not 'const-extern-fn' is enabled</span> |
| <span class="comment">//</span> |
| <span class="comment">// Unfortunately, we need to duplicate most of this macro between the 'cfg_if' blocks.</span> |
| <span class="comment">// This is because 'const unsafe extern fn' won't even parse on older compilers,</span> |
| <span class="comment">// so we need to avoid emitting it at all of 'const-extern-fn'.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Specifically, moving the 'cfg_if' into the macro body will *not* work.</span> |
| <span class="comment">// Doing so would cause the '#[cfg(feature = "const-extern-fn")]' to be emitted</span> |
| <span class="comment">// into user code. The 'cfg' gate will not stop Rust from trying to parse the</span> |
| <span class="comment">// 'pub const unsafe extern fn', so users would get a compiler error even when</span> |
| <span class="comment">// the 'const-extern-fn' feature is disabled</span> |
| <span class="comment">//</span> |
| <span class="comment">// Note that users of this macro need to place 'const' in a weird position</span> |
| <span class="comment">// (after the closing ')' for the arguments, but before the return type).</span> |
| <span class="comment">// This was the only way I could satisfy the following two requirements:</span> |
| <span class="comment">// 1. Avoid ambiguity errors from 'macro_rules!' (which happen when writing '$foo:ident fn'</span> |
| <span class="comment">// 2. Allow users of this macro to mix 'pub fn foo' and 'pub const fn bar' within the same</span> |
| <span class="comment">// 'f!' block</span> |
| <span class="macro">cfg_if!</span> { |
| <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">libc_const_extern_fn</span>)]</span> { |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">f</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>)<span class="op">*</span> <span class="kw">unsafe</span> <span class="kw">extern</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">safe_f</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>)<span class="op">*</span> <span class="kw">extern</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">const_fn</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>)<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| } <span class="kw">else</span> { |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">f</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">extern</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">safe_f</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="kw">pub</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">extern</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">const_fn</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> $({<span class="macro-nonterminal">$</span><span class="macro-nonterminal">constness</span>:<span class="ident">ident</span>})<span class="op">*</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">ident</span>( |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>:<span class="ident">ty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>:<span class="ident">stmt</span>);<span class="op">*</span> |
| })<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">argty</span>),<span class="op">*</span> |
| ) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">body</span>);<span class="op">*</span> |
| } |
| )<span class="kw-2">*</span>) |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">__item</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">item</span>) => { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span> |
| }; |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">align_const</span> { |
| ($($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> : <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t1</span>:<span class="ident">ty</span> |
| <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t2</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>:<span class="ident">tt</span>)<span class="op">*</span> };)<span class="kw-2">*</span>) => ($( |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">libc_align</span>)]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> : <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t1</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t2</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> |
| }; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">libc_align</span>))]</span> |
| $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">attr</span>]</span>)<span class="op">*</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> : <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t1</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t2</span> { |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">field</span>)<span class="op">*</span> |
| <span class="ident">__align</span>: [], |
| }; |
| )<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="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">deprecated_mach</span> { |
| (<span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>;) => { |
| <span class="attribute">#[<span class="ident">deprecated</span>( |
| <span class="ident">since</span> <span class="op">=</span> <span class="string">"0.2.55"</span>, |
| <span class="ident">note</span> <span class="op">=</span> <span class="string">"Use the `mach2` crate instead"</span>, |
| )]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>; |
| }; |
| ($(<span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>;)<span class="kw-2">*</span>) => { |
| $( |
| <span class="macro">deprecated_mach!</span>( |
| <span class="kw">pub</span> <span class="kw">const</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>; |
| ); |
| )<span class="op">*</span> |
| }; |
| (<span class="kw">pub</span> <span class="kw">type</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span>;) => { |
| <span class="attribute">#[<span class="ident">deprecated</span>( |
| <span class="ident">since</span> <span class="op">=</span> <span class="string">"0.2.55"</span>, |
| <span class="ident">note</span> <span class="op">=</span> <span class="string">"Use the `mach2` crate instead"</span>, |
| )]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>; |
| }; |
| ($(<span class="kw">pub</span> <span class="kw">type</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span>;)<span class="kw-2">*</span>) => { |
| $( |
| <span class="macro">deprecated_mach!</span>( |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>; |
| ); |
| )<span class="op">*</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">libc_ptr_addr_of</span>))]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">ptr_addr_of</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">place</span>:<span class="ident">expr</span>) => { |
| <span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">place</span> |
| }; |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_macros</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">libc_ptr_addr_of</span>)]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">ptr_addr_of</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">place</span>:<span class="ident">expr</span>) => { |
| <span class="macro">::core::ptr::addr_of!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">place</span>) |
| }; |
| } |
| </code></pre></div> |
| </section><section id="search" class="content hidden"></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="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
| </body></html> |
