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<title>Type error_code</title>
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<h2><span class="refentrytitle">Type error_code</span></h2>
<p>boost::execution_exception::error_code &#8212; These values are sometimes used as program return codes. The particular values have been chosen to avoid conflicts with commonly used program return codes: values &lt; 100 are often user assigned, values &gt; 255 are sometimes used to report system errors. Gaps in values allow for orderly expansion. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../header/boost/test/execution_monitor_hpp.html" title="Header &lt;boost/test/execution_monitor.hpp&gt;">boost/test/execution_monitor.hpp</a>&gt;

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<span class="keyword">enum</span> <span class="identifier">error_code</span> <span class="special">{</span> <a class="link" href="error_code.html#boost.execution_exception.error_code.no_error">no_error</a> = = 0, <a class="link" href="error_code.html#boost.execution_exception.error_code.user_error">user_error</a> = = 200, 
                  <a class="link" href="error_code.html#boost.execution_exception.error_code.cpp_exception_error">cpp_exception_error</a> = = 205, <a class="link" href="error_code.html#boost.execution_exception.error_code.system_error">system_error</a> = = 210, 
                  <a class="link" href="error_code.html#boost.execution_exception.error_code.timeout_error">timeout_error</a> = = 215, <a class="link" href="error_code.html#boost.execution_exception.error_code.user_fatal_error">user_fatal_error</a> = = 220, 
                  <a class="link" href="error_code.html#boost.execution_exception.error_code.system_fatal_error">system_fatal_error</a> = = 225 <span class="special">}</span><span class="special">;</span></pre></div>
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<a name="idm45313890428784"></a><h2>Description</h2>
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<th align="left">Note</th>
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<tr><td align="left" valign="top"><p>(1) Only uncaught C++ exceptions are treated as errors. If a function catches a C++ exception, it never reaches the <a class="link" href="../execution_monitor.html" title="Class execution_monitor">execution_monitor</a>.</p></td></tr>
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The implementation decides what is a system_fatal_error and what is just a system_exception. Fatal errors are so likely to have corrupted machine state (like a stack overflow or addressing exception) that it is unreasonable to continue execution.</p>
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<tr><td align="left" valign="top"><p>(2) These errors include Unix signals and Windows structured exceptions. They are often initiated by hardware traps. </p></td></tr>
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<div class="variablelist"><dl class="variablelist compact">
<dt><span class="term"><code class="computeroutput">no_error</code><a name="boost.execution_exception.error_code.no_error"></a></span></dt>
<dd>for completeness only; never returned </dd>
<dt><span class="term"><code class="computeroutput">user_error</code><a name="boost.execution_exception.error_code.user_error"></a></span></dt>
<dd>user reported non-fatal error </dd>
<dt><span class="term"><code class="computeroutput">cpp_exception_error</code><a name="boost.execution_exception.error_code.cpp_exception_error"></a></span></dt>
<dd>see note (1) above </dd>
<dt><span class="term"><code class="computeroutput">system_error</code><a name="boost.execution_exception.error_code.system_error"></a></span></dt>
<dd>see note (2) above </dd>
<dt><span class="term"><code class="computeroutput">timeout_error</code><a name="boost.execution_exception.error_code.timeout_error"></a></span></dt>
<dd>only detectable on certain platforms </dd>
<dt><span class="term"><code class="computeroutput">user_fatal_error</code><a name="boost.execution_exception.error_code.user_fatal_error"></a></span></dt>
<dd>user reported fatal error </dd>
<dt><span class="term"><code class="computeroutput">system_fatal_error</code><a name="boost.execution_exception.error_code.system_fatal_error"></a></span></dt>
<dd>see note (2) above </dd>
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