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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span><a class="srclink" href="../src/cfg_if/lib.rs.html#34-87" title="goto source code">[src]</a></span><span class="in-band">Macro <a href="index.html">cfg_if</a>::<wbr><a class="macro" href="">cfg_if</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><div class="example-wrap"><pre class="rust macro">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">cfg_if</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> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tokens</span>:<span class="ident">tt</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">tokens2</span>:<span class="ident">tt</span>)<span class="op">*</span>
}) <span class="op">=</span><span class="op">&gt;</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> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i_tokens</span>:<span class="ident">tt</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> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e_tokens</span>:<span class="ident">tt</span>)<span class="op">*</span> }
)<span class="op">*</span>
) <span class="op">=</span><span class="op">&gt;</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="op">=</span><span class="op">&gt;</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">tokens</span>:<span class="ident">tt</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="op">=</span><span class="op">&gt;</span> { ... };
(@<span class="ident">__identity</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tokens</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">&gt;</span> { ... };
}</pre></div>
</div><div class="docblock"><p>The main macro provided by this crate. See crate documentation for more
information.</p>
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