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181 lines
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<meta name="description" content="API documentation for the Rust `rustc_demangle` crate.">
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<meta name="keywords" content="rust, rustlang, rust-lang, rustc_demangle">
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<title>rustc_demangle - Rust</title>
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<div class="sidebar-menu">☰</div>
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<p class='location'>Crate rustc_demangle</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'rustc_demangle', ty: 'mod', relpath: '../'};</script></div>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>rustc_demangle</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../src/rustc_demangle/lib.rs.html#1-501' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>Demangle Rust compiler symbol names.</p>
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<p>This crate provides a <code>demangle</code> function which will return a <code>Demangle</code>
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sentinel value that can be used to learn about the demangled version of a
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symbol name. The demangled representation will be the same as the original
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if it doesn't look like a mangled symbol name.</p>
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<p><code>Demangle</code> can be formatted with the <code>Display</code> trait. The alternate
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modifier (<code>#</code>) can be used to format the symbol name without the
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trailing hash value.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">rustc_demangle</span>::<span class="ident">demangle</span>;
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">demangle</span>(<span class="string">"_ZN4testE"</span>).<span class="ident">to_string</span>(), <span class="string">"test"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">demangle</span>(<span class="string">"_ZN3foo3barE"</span>).<span class="ident">to_string</span>(), <span class="string">"foo::bar"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">demangle</span>(<span class="string">"foo"</span>).<span class="ident">to_string</span>(), <span class="string">"foo"</span>);
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<span class="comment">// With hash</span>
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">demangle</span>(<span class="string">"_ZN3foo17h05af221e174051e9E"</span>)), <span class="string">"foo::h05af221e174051e9"</span>);
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<span class="comment">// Without hash</span>
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:#}"</span>, <span class="ident">demangle</span>(<span class="string">"_ZN3foo17h05af221e174051e9E"</span>)), <span class="string">"foo"</span>);</pre>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.Demangle.html"
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title='struct rustc_demangle::Demangle'>Demangle</a></td>
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<td class='docblock-short'>
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<p>Representation of a demangled symbol name.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.TryDemangleError.html"
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title='struct rustc_demangle::TryDemangleError'>TryDemangleError</a></td>
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<td class='docblock-short'>
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<p>Error returned from the <code>try_demangle</code> function below when demangling fails.</p>
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</td>
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</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="fn" href="fn.demangle.html"
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title='fn rustc_demangle::demangle'>demangle</a></td>
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<td class='docblock-short'>
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<p>De-mangles a Rust symbol into a more readable version</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="fn" href="fn.try_demangle.html"
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title='fn rustc_demangle::try_demangle'>try_demangle</a></td>
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<td class='docblock-short'>
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<p>The same as <code>demangle</code>, except return an <code>Err</code> if the string does not appear
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to be a Rust symbol, rather than "demangling" the given string as a no-op.</p>
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