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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="boost_multiprecision.tut.misc.visualizers"></a><a class="link" href="visualizers.html" title="Visual C++ Debugger Visualizers">Visual C++
  28         Debugger Visualizers</a>
  29 </h4></div></div></div>
  30 <p>
  31           Let's face it debugger multiprecision numbers is hard - simply because
  32           we can't easily inspect the value of the numbers. Visual C++ provides a
  33           partial solution in the shape of "visualizers" which provide
  34           improved views of complex data structures, these visualizers need to be
  35           added to the <code class="computeroutput"><span class="special">[</span><span class="identifier">Visualizer</span><span class="special">]</span></code> section of <code class="computeroutput"><span class="identifier">autoexp</span><span class="special">.</span><span class="identifier">dat</span></code>
  36           located in the <code class="computeroutput"><span class="identifier">Common7</span><span class="special">/</span><span class="identifier">Packages</span><span class="special">/</span><span class="identifier">Debugger</span></code>
  37           directory of your Visual Studio installation. The actual visualizer code
  38           is in the sandbox <a href="https://svn.boost.org/svn/boost/sandbox/boost_docs/subprojects/DebuggerVisualizers/multiprecision.vis.txt" target="_top">here</a>
  39           - just cut and paste the code into your <code class="computeroutput"><span class="identifier">autoexp</span><span class="special">.</span><span class="identifier">dat</span></code>
  40           file.
  41         </p>
  42 <div class="note"><table border="0" summary="Note">
  43 <tr>
  44 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td>
  45 <th align="left">Note</th>
  46 </tr>
  47 <tr><td align="left" valign="top"><p>
  48             These visualizers have only been tested with VC10, also given the ability
  49             of buggy visualizers to crash your Visual C++ debugger, make sure you
  50             back up <code class="computeroutput"><span class="identifier">autoexp</span><span class="special">.</span><span class="identifier">dat</span></code> file before using these!!
  51           </p></td></tr>
  52 </table></div>
  53 <p>
  54           The first visualizer provides improved views of <code class="computeroutput"><span class="identifier">debug_adaptor</span></code>:
  55         </p>
  56 <p>
  57           <span class="inlinemediaobject"><img src="../../../../debugger1.png"></span>
  58         </p>
  59 <p>
  60           The next visualizer provides improved views of cpp_int: small numbers are
  61           displayed as actual values, while larger numbers are displayed as an array
  62           of hexadecimal parts, with the most significant part first.
  63         </p>
  64 <p>
  65           Here's what it looks like for small values:
  66         </p>
  67 <p>
  68           <span class="inlinemediaobject"><img src="../../../../debugger4.png"></span>
  69         </p>
  70 <p>
  71           And for larger values:
  72         </p>
  73 <p>
  74           <span class="inlinemediaobject"><img src="../../../../debugger5.png"></span>
  75         </p>
  76 <p>
  77           There is also a <code class="computeroutput"><span class="special">~</span><span class="identifier">raw</span></code>
  78           child member that lets you see the actual members of the class:
  79         </p>
  80 <p>
  81           <span class="inlinemediaobject"><img src="../../../../debugger6.png"></span>
  82         </p>
  83 <p>
  84           The visualizer for <code class="computeroutput"><span class="identifier">cpp_dec_float</span></code>
  85           shows the first few digits of the value in the preview field, and the full
  86           array of digits when you expand the view. As before the <code class="computeroutput"><span class="special">~</span><span class="identifier">raw</span></code> child gives you access to the actual
  87           data members:
  88         </p>
  89 <p>
  90           <span class="inlinemediaobject"><img src="../../../../debugger7.png"></span>
  91         </p>
  92 </div>
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  95 <td align="right"><div class="copyright-footer">Copyright &#169; 2002-2019 John Maddock
  96       and Christopher Kormanyos<p>
  97         Distributed under the Boost Software License, Version 1.0. (See accompanying
  98         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
  99       </p>
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