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| <a name="core.demangle"></a><a class="link" href="demangle.html" title="demangle">demangle</a> |
| </h2></div></div></div> |
| <div class="toc"><dl class="toc"> |
| <dt><span class="section"><a href="demangle.html#core.demangle.header_boost_core_demangle_hpp">Header |
| <boost/core/demangle.hpp></a></span></dt> |
| <dt><span class="section"><a href="demangle.html#core.demangle.acknowledgments">Acknowledgments</a></span></dt> |
| </dl></div> |
| <div class="simplesect"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="idp85454880"></a>Authors</h3></div></div></div> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Peter Dimov |
| </li> |
| <li class="listitem"> |
| Andrey Semashev |
| </li> |
| </ul></div> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp" title="Header <boost/core/demangle.hpp>">Header |
| <boost/core/demangle.hpp></a> |
| </h3></div></div></div> |
| <p> |
| The header <code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">demangle</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| defines several tools for undecorating symbol names. |
| </p> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp.synopsis"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp.synopsis" title="Synopsis">Synopsis</a> |
| </h4></div></div></div> |
| <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> |
| <span class="special">{</span> |
| |
| <span class="keyword">namespace</span> <span class="identifier">core</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">demangle</span><span class="special">(</span> <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">name</span> <span class="special">);</span> |
| |
| <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">demangle_alloc</span><span class="special">(</span> <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">name</span> <span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> |
| <span class="keyword">void</span> <span class="identifier">demangle_free</span><span class="special">(</span> <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">demangled_name</span> <span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> |
| |
| <span class="keyword">class</span> <span class="identifier">scoped_demangled_name</span> |
| <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="keyword">explicit</span> <span class="identifier">scoped_demangled_name</span><span class="special">(</span> <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">name</span> <span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> |
| <span class="special">~</span><span class="identifier">scoped_demangled_name</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> |
| <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">get</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> |
| |
| <span class="identifier">scoped_demangled_name</span><span class="special">(</span> <span class="identifier">scoped_demangled_name</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> |
| <span class="identifier">scoped_demangled_name</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=</span> <span class="special">(</span> <span class="identifier">scoped_demangled_name</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> |
| <span class="special">};</span> |
| <span class="special">}</span> |
| |
| <span class="special">}</span> |
| </pre> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp.conventional_interface"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp.conventional_interface" title="Conventional interface">Conventional |
| interface</a> |
| </h4></div></div></div> |
| <p> |
| The function <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle</span></code> is the conventional way to obtain |
| demangled symbol name. It takes a mangled string such as those returned |
| by <code class="computeroutput"><span class="keyword">typeid</span><span class="special">(</span><span class="identifier">T</span><span class="special">).</span><span class="identifier">name</span><span class="special">()</span></code> on certain implementations such as <code class="computeroutput"><span class="identifier">g</span><span class="special">++</span></code>, |
| and returns its demangled, human-readable, form. In case if demangling |
| fails (e.g. if <code class="computeroutput"><span class="identifier">name</span></code> cannot |
| be interpreted as a mangled name) the function returns <code class="computeroutput"><span class="identifier">name</span></code>. |
| </p> |
| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp.conventional_interface.example"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp.conventional_interface.example" title="Example">Example</a> |
| </h5></div></div></div> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">demangle</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">typeinfo</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> <span class="keyword">struct</span> <span class="identifier">X</span> |
| <span class="special">{</span> |
| <span class="special">};</span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">name</span> <span class="special">=</span> <span class="keyword">typeid</span><span class="special">(</span> <span class="identifier">X</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">).</span><span class="identifier">name</span><span class="special">();</span> |
| |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">name</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// prints 1XIiE</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle</span><span class="special">(</span> <span class="identifier">name</span> <span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// prints X<int></span> |
| <span class="special">}</span> |
| </pre> |
| </div> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp.low_level_interface"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp.low_level_interface" title="Low level interface">Low |
| level interface</a> |
| </h4></div></div></div> |
| <p> |
| In some cases more low level interface may be desirable. For example: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Assuming that symbol demangling may fail, the user wants to be able |
| to handle such errors. |
| </li> |
| <li class="listitem"> |
| The user needs to post-process the demangled name (e.g. remove common |
| namespaces), and allocating a temporary string with the complete demangled |
| name is significant overhead. |
| </li> |
| </ul></div> |
| <p> |
| The function <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle_alloc</span></code> performs name demangling |
| and returns a pointer to a string with the demangled name, if succeeded, |
| or <code class="computeroutput"><span class="keyword">nullptr</span></code> otherwise. The |
| returned pointer must be passed to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle_free</span></code> |
| to reclaim resources. Note that on some platforms the pointer returned |
| by <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle_alloc</span></code> may refer to the string |
| denoted by <code class="computeroutput"><span class="identifier">name</span></code>, so this |
| string must be kept immutable for the whole life time of the returned pointer. |
| </p> |
| <p> |
| The <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">scoped_demangled_name</span></code> class is a scope |
| guard that automates the calls to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle_alloc</span></code> |
| (on its construction) and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle_free</span></code> |
| (on destruction). The string with the demangled name can be obtained with |
| its <code class="computeroutput"><span class="identifier">get</span></code> method. Note that |
| this method may return <code class="computeroutput"><span class="keyword">nullptr</span></code> |
| if demangling failed. |
| </p> |
| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="core.demangle.header_boost_core_demangle_hpp.low_level_interface.example"></a><a class="link" href="demangle.html#core.demangle.header_boost_core_demangle_hpp.low_level_interface.example" title="Example">Example</a> |
| </h5></div></div></div> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">demangle</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">typeinfo</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> <span class="keyword">struct</span> <span class="identifier">X</span> |
| <span class="special">{</span> |
| <span class="special">};</span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span> <span class="identifier">name</span> <span class="special">=</span> <span class="keyword">typeid</span><span class="special">(</span> <span class="identifier">X</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">).</span><span class="identifier">name</span><span class="special">();</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">core</span><span class="special">::</span><span class="identifier">scoped_demangled_name</span> <span class="identifier">demangled</span><span class="special">(</span> <span class="identifier">name</span> <span class="special">);</span> |
| |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">name</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// prints 1XIiE</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="special">(</span><span class="identifier">demangled</span><span class="special">.</span><span class="identifier">get</span><span class="special">()</span> <span class="special">?</span> <span class="identifier">demangled</span><span class="special">.</span><span class="identifier">get</span><span class="special">()</span> <span class="special">:</span> <span class="string">"[unknown]"</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// prints X<int></span> |
| <span class="special">}</span> |
| </pre> |
| </div> |
| </div> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="core.demangle.acknowledgments"></a><a class="link" href="demangle.html#core.demangle.acknowledgments" title="Acknowledgments">Acknowledgments</a> |
| </h3></div></div></div> |
| <p> |
| The implementation of <code class="computeroutput"><span class="identifier">core</span><span class="special">::</span><span class="identifier">demangle</span></code> |
| was taken from <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">exception</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">type_info</span><span class="special">.</span><span class="identifier">hpp</span></code>, which in turn was adapted from <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">units</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">utility</span><span class="special">.</span><span class="identifier">hpp</span></code> and <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">log</span><span class="special">/</span><span class="identifier">utility</span><span class="special">/</span><span class="identifier">type_info_wrapper</span><span class="special">.</span><span class="identifier">hpp</span></code>. |
| </p> |
| </div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2014 Peter Dimov<br>Copyright © 2014 Glen Fernandes<br>Copyright © 2014 Andrey Semashev<p> |
| Distributed under the <a href="http://boost.org/LICENSE_1_0.txt" target="_top">Boost |
| Software License, Version 1.0</a>. |
| </p> |
| </div></td> |
| </tr></table> |
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