mirror of
https://github.com/boostorg/preprocessor.git
synced 2025-07-05 00:36:31 +02:00
91 lines
2.5 KiB
HTML
91 lines
2.5 KiB
HTML
<html>
|
|
<head>
|
|
<title>BOOST_PP_INCLUDE_SELF</title>
|
|
<link rel="stylesheet" type="text/css" href="../styles.css">
|
|
</head>
|
|
<body>
|
|
<div style="margin-left: 0px;">
|
|
The <b>BOOST_PP_INCLUDE_SELF</b> macro includes a file indirectly.
|
|
</div>
|
|
<h4>Usage</h4>
|
|
<div class="code">
|
|
#include <b>BOOST_PP_INCLUDE_SELF</b>()
|
|
</div>
|
|
<h4>Arguments</h4>
|
|
<dl>
|
|
<dt>filename</dt>
|
|
<dd>
|
|
A quoted or angle-bracketed filename to be included by <b>BOOST_PP_INCLUDE_SELF</b>.
|
|
</dd>
|
|
</dl>
|
|
<h4>Remarks</h4>
|
|
<div>
|
|
<b>BOOST_PP_INDIRECT_SELF</b> must be defined prior to using this macro.
|
|
</div>
|
|
<div>
|
|
Most preprocessors will not allow a file to directly include itself--even when the file protects itself from such a scenario.
|
|
This macro, in combination with <b>BOOST_PP_INDIRECT_SELF</b> allows a file to include itself indirectly.
|
|
</div>
|
|
<div>
|
|
While <b>BOOST_PP_INDIRECT_SELF</b> is being included, <b>BOOST_PP_INCLUDE_SELF</b> defines the macro <b>BOOST_PP_IS_SELFISH</b> to <i>1</i>.
|
|
When it returns from the inclusion, <b>BOOST_PP_IS_SELFISH</b> is undefined.
|
|
</div>
|
|
<h4>See Also</h4>
|
|
<ul>
|
|
<li><a href="indirect_self.html">BOOST_PP_INDIRECT_SELF</a></li>
|
|
<li><a href="is_selfish.html">BOOST_PP_IS_SELFISH</a></li>
|
|
</ul>
|
|
<h4>Requirements</h4>
|
|
<div>
|
|
<b>Header:</b> <a href="../headers/iteration/self.hpp.html"><boost/preprocessor/iteration/self.hpp></a>
|
|
</div>
|
|
<h4>Sample Code</h4>
|
|
<div><pre>
|
|
// file.h
|
|
#if !<a href="is_selfish.html">BOOST_PP_IS_SELFISH</a>
|
|
|
|
#ifndef FILE_H_
|
|
#define FILE_H_
|
|
|
|
#include <<a href="../headers/iteration/self.hpp.html">boost/preprocessor/iteration/self.hpp</a>>
|
|
|
|
#define NAME X
|
|
struct NAME {
|
|
// ...
|
|
#define <a href="indirect_self.html">BOOST_PP_INDIRECT_SELF</a> "file.h"
|
|
#include <a href="include_self.html">BOOST_PP_INCLUDE_SELF</a>()
|
|
};
|
|
|
|
#define NAME Y
|
|
struct NAME {
|
|
// ...
|
|
#define <a href="indirect_self.html">BOOST_PP_INDIRECT_SELF</a> "file.h"
|
|
#include <a href="include_self.html">BOOST_PP_INCLUDE_SELF</a>()
|
|
};
|
|
|
|
#define NAME Z
|
|
struct NAME {
|
|
// ...
|
|
#define <a href="indirect_self.html">BOOST_PP_INDIRECT_SELF</a> "file.h"
|
|
#include <a href="include_self.html">BOOST_PP_INCLUDE_SELF</a>()
|
|
};
|
|
|
|
#endif
|
|
|
|
#else
|
|
|
|
inline bool validate(NAME* p) {
|
|
return true;
|
|
}
|
|
|
|
template<class T> bool validate(T* p) {
|
|
return dynamic_cast<NAME*>(p);
|
|
}
|
|
|
|
#undef NAME
|
|
|
|
#endif
|
|
</pre></div>
|
|
</body>
|
|
</html>
|