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<h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>enum_primitive</a>::<wbr><a class="macro" href=''>enum_from_primitive</a></span><span class='out-of-band'><span id='render-detail'>
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               </span><a class='srclink' href='../src/enum_primitive/lib.rs.html#92-196' title='goto source code'>[src]</a></span></h1>
<pre class="rust macro">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">enum_from_primitive</span> {
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
        <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> {
            $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> $( <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span>, $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two</span>:<span class="ident">ident</span> ),<span class="op">+</span> )<span class="op">*</span>
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
        <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> {
            $( $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span> ),<span class="op">*</span>
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
        <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> {
            $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> $( <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span>, $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two</span>:<span class="ident">ident</span> ),<span class="op">+</span> )<span class="kw-2">*</span>,
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
        <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> {
            $( $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span> ),<span class="op">+</span>,
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_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">name</span>:<span class="ident">ident</span> {
            $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> $( <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span>, $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two</span>:<span class="ident">ident</span> ),<span class="op">+</span> )<span class="op">*</span>
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_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">name</span>:<span class="ident">ident</span> {
            $( $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span> ),<span class="op">*</span>
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_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">name</span>:<span class="ident">ident</span> {
            $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> $( <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span>, $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_two</span>:<span class="ident">ident</span> ),<span class="op">+</span> )<span class="kw-2">*</span>,
        }
    ) <span class="op">=&gt;</span> { ... };
    (
        $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enum_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">name</span>:<span class="ident">ident</span> {
            $( $( $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant_attr</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">variant</span>:<span class="ident">ident</span> ),<span class="op">+</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">discriminator</span>:<span class="ident">expr</span> ),<span class="op">+</span>,
        }
    ) <span class="op">=&gt;</span> { ... };
}</pre>
<div class='docblock'><p>Wrap this macro around an <code>enum</code> declaration to get an
automatically generated implementation of <code>num::FromPrimitive</code>.</p>
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