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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_multiprecision.tut.misc.visualizers"></a><a class="link" href="visualizers.html" title="Visual C++ Debugger Visualizers">Visual C++ |
| Debugger Visualizers</a> |
| </h4></div></div></div> |
| <p> |
| Let's face it debugger multiprecision numbers is hard - simply because |
| we can't easily inspect the value of the numbers. Visual C++ provides a |
| partial solution in the shape of "visualizers" which provide |
| improved views of complex data structures, these visualizers need to be |
| 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> |
| 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> |
| directory of your Visual Studio installation. The actual visualizer code |
| is in the sandbox <a href="https://svn.boost.org/svn/boost/sandbox/boost_docs/subprojects/DebuggerVisualizers/multiprecision.vis.txt" target="_top">here</a> |
| - 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> |
| file. |
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| <tr><td align="left" valign="top"><p> |
| These visualizers have only been tested with VC10, also given the ability |
| of buggy visualizers to crash your Visual C++ debugger, make sure you |
| back up <code class="computeroutput"><span class="identifier">autoexp</span><span class="special">.</span><span class="identifier">dat</span></code> file before using these!! |
| </p></td></tr> |
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| <p> |
| The first visualizer provides improved views of <code class="computeroutput"><span class="identifier">debug_adaptor</span></code>: |
| </p> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../../debugger1.png"></span> |
| </p> |
| <p> |
| The next visualizer provides improved views of cpp_int: small numbers are |
| displayed as actual values, while larger numbers are displayed as an array |
| of hexadecimal parts, with the most significant part first. |
| </p> |
| <p> |
| Here's what it looks like for small values: |
| </p> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../../debugger4.png"></span> |
| </p> |
| <p> |
| And for larger values: |
| </p> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../../debugger5.png"></span> |
| </p> |
| <p> |
| There is also a <code class="computeroutput"><span class="special">~</span><span class="identifier">raw</span></code> |
| child member that lets you see the actual members of the class: |
| </p> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../../debugger6.png"></span> |
| </p> |
| <p> |
| The visualizer for <code class="computeroutput"><span class="identifier">cpp_dec_float</span></code> |
| shows the first few digits of the value in the preview field, and the full |
| 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 |
| data members: |
| </p> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../../debugger7.png"></span> |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2002-2013 John Maddock and Christopher Kormanyos<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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>) |
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