1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Function precondition_failure</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. 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xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 32<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../reference.html#header.boost.contract.core.exception_hpp" title="Header <boost/contract/core/exception.hpp>">boost/contract/core/exception.hpp</a>> 33 34</span> 35<span class="keyword">void</span> <span class="identifier">precondition_failure</span><span class="special">(</span><span class="identifier">from</span> where<span class="special">)</span><span class="special">;</span></pre></div> 36<div class="refsect1"> 37<a name="idm45988678702256"></a><h2>Description</h2> 38<p>This is often called only internally by this library.</p> 39<p><span class="bold"><strong>Throws:</strong></span> This can throw in case programmers specify a failure handler that throws exceptions on contract assertion failures (not the default).</p> 40<p> 41</p> 42<p><span class="bold"><strong>See Also:</strong></span></p> 43<p> <a class="link" href="../../boost_contract/advanced.html#boost_contract.advanced.throw_on_failures__and__noexcept__" title="Throw on Failures (and noexcept)"> Throw on Failure</a>, <a class="link" href="../../boost_contract/tutorial.html#boost_contract.tutorial.preconditions" title="Preconditions"> Preconditions</a> </p> 44<p> 45</p> 46<p> 47</p> 48<div class="variablelist"><table border="0" class="variablelist compact"> 49<colgroup> 50<col align="left" valign="top"> 51<col> 52</colgroup> 53<tbody><tr> 54<td><p><span class="term">Parameters:</span></p></td> 55<td><div class="variablelist"><table border="0" class="variablelist compact"> 56<colgroup> 57<col align="left" valign="top"> 58<col> 59</colgroup> 60<tbody><tr> 61<td><p><span class="term"><code class="computeroutput">where</code></span></p></td> 62<td><p>Operation that failed the contract assertion (when this function is called by this library, this parameter will never be <code class="computeroutput">from_destructor</code> because destructors do not have preconditions).</p></td> 63</tr></tbody> 64</table></div></td> 65</tr></tbody> 66</table></div> 67</div> 68</div> 69<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 70<td align="left"></td> 71<td align="right"><div class="copyright-footer">Copyright © 2008-2019 Lorenzo Caminiti<p> 72 Distributed under the Boost Software License, Version 1.0 (see accompanying 73 file LICENSE_1_0.txt or a copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 74 </p> 75</div></td> 76</tr></table> 77<hr> 78<div class="spirit-nav"> 79<a accesskey="p" href="get_precondition_failure.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../reference.html#header.boost.contract.core.exception_hpp"><img 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