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<h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>tokio_core</a>::<wbr><a class="macro" href=''>try_nb</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/tokio_core/io/mod.rs.html#35-43' 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">try_nb</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>) <span class="op">=&gt;</span> { ... };
}</pre>
<div class='docblock'><p>A convenience macro for working with <code>io::Result&lt;T&gt;</code> from the <code>Read</code> and
<code>Write</code> traits.</p>
<p>This macro takes <code>io::Result&lt;T&gt;</code> as input, and returns <code>T</code> as the output. If
the input type is of the <code>Err</code> variant, then <code>Poll::NotReady</code> is returned if
it indicates <code>WouldBlock</code> or otherwise <code>Err</code> is returned.</p>
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