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<h4>Named External Argument</h4>
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A <i>named external argument</i> is an argument to a macro that is <i>included</i>.
There is no way to pass arguments to a file directly, so they must be passed to files in the form of macros with known names that are defined by the user.
Every time that the library uses this idiom, the file that is included automatically undefines the macro in order to better simulate <i>normal</i> parameters.
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<i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
</br><i>� Copyright Paul Mensonides 2002</i>
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<p><small>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">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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