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<h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>failure</a>::<wbr><a class="macro" href=''>bail</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class="rust macro">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">bail</span> {
    (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>) <span class="op">=&gt;</span> { ... };
    (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">tt</span>)<span class="op">+</span>) <span class="op">=&gt;</span> { ... };
}</pre>
<div class='docblock'><p>Exits a function early with an <code>Error</code>.</p>
<p>The <code>bail!</code> macro provides an easy way to exit a function. <code>bail!(X)</code> is
equivalent to writing:</p>

<div class='information'><div class='tooltip ignore'>ⓘ<span class='tooltiptext'>This example is not tested</span></div></div><pre class="rust rust-example-rendered ignore">
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format_err</span><span class="macro">!</span>(<span class="ident">X</span>))</pre>
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