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<title>Boost: throw_exception.hpp documentation</title> <meta http-equiv=refresh content="0; URL=../exception/doc/throw_exception.html">
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<table border="0" width="100%"> Automatic redirection failed, please go to
<tr> <a href="../exception/doc/throw_exception.html">throw_exception.html</a>.&nbsp;<hr>
<td width="277"><A href="../../index.htm"> <img src="../../boost.png" alt="boost.png (6897 bytes)" width="277" height="86" border="0"></A> <p>© Copyright Beman Dawes, 2001</p>
</td> <p>Distributed under the Boost Software License, Version 1.0. (See accompanying
<td align="center"> file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy
<h1>throw_exception.hpp</h1> at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</p>
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<p>
The header <STRONG>&lt;boost/throw_exception.hpp&gt;</STRONG> defines the
helper function <STRONG>boost::throw_exception</STRONG>. It is intended to be
used in Boost libraries that need to throw exceptions, but support
configurations and platforms where exceptions aren't available, as indicated by
the presence of the <STRONG>BOOST_NO_EXCEPTIONS</STRONG> <A href="../config/config.htm#macro_ref">
configuration macro</A>.
</p>
<P>When <STRONG>BOOST_NO_EXCEPTIONS</STRONG> is not defined, <tt>boost::throw_exception(e)</tt>
is equivalent to <tt>throw e</tt>. Otherwise, the function is left undefined,
and the user is expected to supply an appropriate definition. Callers of <tt>throw_exception</tt>
are allowed to assume that the function never returns; therefore, if the
user-defined <tt>throw_exception</tt> returns, the behavior is undefined.</P>
<h3><a name="Synopsis">Synopsis</a></h3>
<pre>
namespace boost
{
#ifdef BOOST_NO_EXCEPTIONS
void throw_exception(std::exception const &amp; e); // user defined
#else
template&lt;class E&gt; void throw_exception(E const &amp; e)
{
throw e;
}
#endif
}
</pre>
<p><br>
<small>Copyright © 2002 by Peter Dimov. Distributed under the Boost Software License, Version
1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or
copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
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