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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>rustc_demangle</a>::<wbr><a class="fn" href=''>try_demangle</a></span><span class='out-of-band'><span id='render-detail'>
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               </span><a class='srclink' href='../src/rustc_demangle/lib.rs.html#185-192' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn try_demangle(s: &amp;str) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="../rustc_demangle/struct.Demangle.html" title="struct rustc_demangle::Demangle">Demangle</a>, <a class="struct" href="../rustc_demangle/struct.TryDemangleError.html" title="struct rustc_demangle::TryDemangleError">TryDemangleError</a>&gt;</pre><div class='docblock'><p>The same as <code>demangle</code>, except return an <code>Err</code> if the string does not appear
to be a Rust symbol, rather than &quot;demangling&quot; the given string as a no-op.</p>

<pre class="rust rust-example-rendered">
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">rustc_demangle</span>;

<span class="kw">let</span> <span class="ident">not_a_rust_symbol</span> <span class="op">=</span> <span class="string">&quot;la la la&quot;</span>;

<span class="comment">// The `try_demangle` function will reject strings which are not Rust symbols.</span>
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">rustc_demangle</span>::<span class="ident">try_demangle</span>(<span class="ident">not_a_rust_symbol</span>).<span class="ident">is_err</span>());

<span class="comment">// While `demangle` will just pass the non-symbol through as a no-op.</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">rustc_demangle</span>::<span class="ident">demangle</span>(<span class="ident">not_a_rust_symbol</span>).<span class="ident">as_str</span>(), <span class="ident">not_a_rust_symbol</span>);</pre>
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