16 lines
4.8 KiB
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16 lines
4.8 KiB
HTML
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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">−</span>]</a></span><a class="srclink" href="../src/log/macros.rs.html#96-103" title="goto source code">[src]</a></span><span class="in-band">Macro <a href="index.html">log</a>::<wbr><a class="macro" href="">warn</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><div class="example-wrap"><pre class="rust macro">
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<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">warn</span> {
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(<span class="ident">target</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">target</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">=</span><span class="op">></span> { ... };
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($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">tt</span>)<span class="op">+</span>) <span class="op">=</span><span class="op">></span> { ... };
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}</pre></div>
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</div><div class="docblock"><p>Logs a message at the warn level.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<div class='information'><div class='tooltip edition'>ⓘ<span class='tooltiptext'>This code runs with edition 2018</span></div></div><div class="example-wrap"><pre class="rust rust-example-rendered edition ">
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<span class="kw">use</span> <span class="ident">log</span>::<span class="ident">warn</span>;
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<span class="kw">let</span> <span class="ident">warn_description</span> <span class="op">=</span> <span class="string">"Invalid Input"</span>;
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<span class="macro">warn</span><span class="macro">!</span>(<span class="string">"Warning! {}!"</span>, <span class="ident">warn_description</span>);
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<span class="macro">warn</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"input_events"</span>, <span class="string">"App received warning: {}"</span>, <span class="ident">warn_description</span>);</pre></div>
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