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<title>Predefined Macros</title>
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<td width="21"> <h1></h1></td>
<td width="885"> <font face="Verdana, Arial, Helvetica, sans-serif"><b><font size="6">Predefined
Macros </font></b></font></td>
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<p dir="ltr">The following table lists the macros, which are predefined by the
<tt>Wave</tt> library. Some of these (all except the <code class="keyword">__LINE__</code>,
<code class="keyword">__FILE__</code>, <code class="keyword">__BASE_FILE__</code>, <code class="keyword">__DATE__</code>,
<code class="keyword">__TIME__</code>, <code class="keyword">__STDC__, __INCLUDE_LEVEL__</code>
and <code class="keyword">__cplusplus</code> macros) may be undefined from the command line of the driver executable
(<a href="wave_driver.html">see</a> the -U option) or through the function <a href="class_reference_context.html#remove_macro_definition">remove_macro_definition()</a>.</p>
<table width="90%" border="0" align="center">
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<td colspan="3" class="table_title"><b>Summary of predefined macros</b></td>
</tr>
<tr class="table_title">
<td width="28%"><b>Name</b></td>
<td width="62%"><p><code><font face="Verdana, Arial, Helvetica, sans-serif">Value</font></code></p></td>
<td width="10%">Undefinable</td>
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<td width="28%" class="table_cells"><code>__STDC__</code></td>
<td width="62%" class="table_cells"><p> 1 (a decimal constant)</p></td>
<td width="10%" class="table_cells"><p>yes</p></td>
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<td width="28%" class="table_cells"><code>__cplusplus</code></td>
<td width="62%" class="table_cells"> <p>199711L (a decimal constant), this
is defined in C++ mode only (C99 mode is off)<br>
In the C++0x mode this decimal constant is guaranteed to be larger than
199711L (the concrete value is to be defined by the C++ committee).</p></td>
<td width="10%" class="table_cells"><p>no</p></td>
</tr>
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<td class="table_cells"><code>__LINE__</code></td>
<td class="table_cells"><p>The line number of the current source line (a decimal
constant)</p></td>
<td class="table_cells"><p>no</p></td>
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<td class="table_cells"><code>__FILE__</code></td>
<td class="table_cells"><p>The presumed name of the source file (a character string literal)</p></td>
<td class="table_cells"><p>no</p></td>
</tr>
<tr>
<td class="table_cells"><code>__BASE_FILE__</code></td>
<td class="table_cells"><p> This macro expands to the name of the main input file (a character string literal). This is the source file that was specified during construction of the <a href="class_reference_context.html"><tt>wave::context</tt></a> template.</p></td>
<td class="table_cells"><p>no</p></td>
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<td class="table_cells"><code>__DATE__</code></td>
<td class="table_cells"><p>The date of translation of the source file (a character
string literal of the form<br>
"Mmm dd yyyy", where the names of the months are the same as
those generated by the asctime function, and the first character of dd
is a space character if the value is less than 10). </p></td>
<td class="table_cells"><p>no</p></td>
</tr>
<tr>
<td class="table_cells"><code>__TIME__</code></td>
<td class="table_cells"><p>The time of translation of the source file (a character
string literal of the form "hh:mm:ss"<br>
as in the time generated by the asctime function).</p></td>
<td class="table_cells"><p>no</p></td>
</tr>
<tr>
<td class="table_cells"><code>__INCLUDE_LEVEL__</code></td>
<td class="table_cells"><p>A decimal integer constant that represents the
depth of nesting in include <br>
files. The value of this macro is incremented on every <tt>#include</tt>
directive <br>
and decremented at every end of file. </p></td>
<td class="table_cells"><p>no</p></td>
</tr>
<tr>
<td class="table_cells"><code>__WAVE__</code><br> <code>__SPIRIT_PP__</code></td>
<td class="table_cells"><p>The version of the driver program (a hexadecinal
constant of the form 0xMmrr, where <span class="literal">'M'</span> is
the major version number, <span class="literal">'m'</span> the minor version
number and <span class="literal">'rr'</span> the release number).</p></td>
<td class="table_cells"><p>yes</p></td>
</tr>
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<td class="table_cells"><code>__WAVE_VERSION__</code><br> <code>__SPIRIT_PP_VERSION__</code></td>
<td class="table_cells"><p>The full version number of the driver program (a
hexadecimal constant of the form 0xMmrrbbbb, where <span class="literal">'M'</span>
is the major version number, <span class="literal">'m'</span> the minor
version number, <span class="literal">'rr'</span> the release number and
<span class="literal">'bbbb'</span> the build number).</p></td>
<td class="table_cells"><p>yes</p></td>
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<td class="table_cells"><code>__WAVE_VERSION_STR__</code><br> <code>__SPIRIT_PP_VERSION_STR__</code></td>
<td class="table_cells"><p>The full version number of the driver program (a
character string literal of the form <span class="string">"M.m.rr.bbbb"</span>,
where <span class="literal">'M'</span> is the major version number, <span class="literal">'m'</span>
the minor version number, <span class="literal">'rr'</span> the release
number and <span class="literal">'bbbb'</span> the build number).</p></td>
<td class="table_cells"><p>yes</p></td>
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<td class="table_cells"><code>__STDC_VERSION__</code></td>
<td class="table_cells"><p>199901L (a decimal constant), this is defined in C99 mode only</p></td>
<td class="table_cells"><p>yes</p></td>
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<td class="table_cells"><code>__STDC_HOSTED__</code></td>
<td class="table_cells"><p>0L (a decimal constant), this is defined in C99 mode only</p></td>
<td class="table_cells"><p>yes</p></td>
</tr>
<tr>
<td class="table_cells"><code>__WAVE_HAS_VARIADICS__</code></td>
<td class="table_cells"><p>1 (a decimal constant), this is defined in C++
mode only if variadics and placemarkers are enabled, and it is defined
in the C99 mode</p></td>
<td class="table_cells"><p>no</p></td>
</tr>
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<td class="table_cells"><code>__WAVE_CONFIG__</code></td>
<td class="table_cells"><p>The configuration information used during the compilation of the Wave library. This is a hexadecimal constant, where each of the bits represents a certain configuration option enabled/disabled during the compilation. You can query this contant using the following macro constants available in the <tt>wave_config_constant.hpp</tt> file:</p>
<blockquote>
<p> <tt>BOOST_WAVE_SUPPORT_VARIADICS_PLACEMARKERS_CONFIG</tt> (value: <span class="literal">0x1</span>) <br>
Variadics and placemarkers are supported</p>
<p><tt>BOOST_WAVE_SUPPORT_PRAGMA_ONCE_CONFIG</tt> (value: <span class="literal">0x02</span>)<br>
<span class="preprocessor">#pragma once</span> (<span class="keyword">_Pragma(once))</span> is supported </p>
<p><tt>BOOST_WAVE_SUPPORT_MS_EXTENSIONS_CONFIG</tt> (value: <span class="literal">0x04</span>)<br>MS Extensions are supported </p>
<p><tt>BOOST_WAVE_PREPROCESS_PRAGMA_BODY_CONFIG</tt> (value: <span class="literal">0x08</span>)<br>
The bodies of <span class="preprocessor">#pragma</span> statements (operator <span class="keyword">_Pragma</span>) will be preprocessed
<p><tt>BOOST_WAVE_USE_STRICT_LEXER_CONFIG</tt> (value: <span class="literal">0x10</span>)<br>
The C/C++ lexers recognize the
strict C99/C++ basic source character set. If it is not defined or defined
to zero, the lexers recognize the <span class="string">'$'</span> character as part of identifiers.</p>
</blockquote>
<p><br>
</p></td>
<td class="table_cells"><p>yes</p></td>
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<p class="copyright">Copyright © 2003-2007 Hartmut Kaiser<br>
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<font size="2">Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) </font> </p>
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<p class="copyright"><span class="updated">Last updated:
<!-- #BeginDate format:fcAm1m -->Monday, March 13, 2006 13:47<!-- #EndDate -->
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