forked from boostorg/preprocessor
Added links to topics with macros which use re-entrancy versions.
This commit is contained in:
@ -1,75 +1,68 @@
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||||
<html>
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||||
<head>
|
||||
<title>BOOST_PP_FOR_r</title>
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||||
<link rel="stylesheet" type="text/css" href="../styles.css">
|
||||
</head>
|
||||
<body>
|
||||
<div style="margin-left: 0px;">
|
||||
The <b>BOOST_PP_FOR_<i>r</i></b> macro represents a reentry into the <b>BOOST_PP_FOR</b> repetition construct.
|
||||
</div>
|
||||
<h4>Usage</h4>
|
||||
<div class="code">
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||||
<b>BOOST_PP_FOR_</b> ## <i>r</i>(<i>state</i>, <i>pred</i>, <i>op</i>, <i>macro</i>)
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</div>
|
||||
<h4>Arguments</h4>
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||||
<dl>
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<dt>r</dt>
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<dd>
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The next available <b>BOOST_PP_FOR</b> repetition.
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</dd>
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||||
<dt>state</dt>
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<dd>
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The initial state.
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</dd>
|
||||
<dt>pred</dt>
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<dd>
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A binary predicate of the form <i>pred</i>(<i>r</i>, <i>state</i>).
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This macro must expand to an integer in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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||||
<b>BOOST_PP_FOR</b> repeatedly expands <i>macro</i> while this predicate returns non-zero.
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This macro is called with the next available <b>BOOST_PP_FOR</b> repetition and the current <i>state</i>.
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</dd>
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<dt>op</dt>
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<dd>
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A binary operation of the form <i>op</i>(<i>r</i>, <i>state</i>).
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This operation is expanded by <b>BOOST_PP_FOR</b> with the next available <b>BOOST_PP_FOR</b> repetition and the current <i>state</i>.
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This macro is repeatedly applied to the <i>state</i>, each time producing a new <i>state</i>, until <i>pred</i> returns <i>0</i>.
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</dd>
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<dt>macro</dt>
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<dd>
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A binary macro of the form <i>macro</i>(<i>r</i>, <i>state</i>).
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This macro is expanded by <b>BOOST_PP_FOR</b> with the next available <b>BOOST_PP_FOR</b> repetition and the current <i>state</i>.
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This macro is is repeated by <b>BOOST_PP_FOR</b> until <i>pred</i> returns <i>0</i>.
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</dd>
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</dl>
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<h4>Remarks</h4>
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<div>
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This macro expands to the sequence:
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<div>
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<i>macro</i>(<i>r</i>, <i>state</i>) <i>macro</i>(<i>r</i>, <i>op</i>(<i>r</i>, <i>state</i>)) ... <i>macro</i>(<i>r</i>, <i>op</i>(<i>r</i>, ... <i>op</i>(<i>r</i>, <i>state</i>) ... ))
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||||
</div>
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||||
</div>
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||||
<div>
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At certain times, it may be necessary to perform the concatenation with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting operator.
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This happens when the <i>r</i> value is a macro invocation itself.
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It needs a delay to allow it to expand.
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The syntax in such a scenario becomes:
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<div>
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||||
<b>BOOST_PP_CAT</b>(<b>BOOST_PP_FOR_</b>, <i>r</i>)(<i>state</i>, <i>pred</i>, <i>op</i>, <i>macro</i>)
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</div>
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||||
</div>
|
||||
<h4>See Also</h4>
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||||
<ul>
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||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
|
||||
<li><a href="for.html">BOOST_PP_FOR</a></li>
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||||
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
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||||
<div>
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<b>Header:</b> <a href="../headers/repetition/for.html"><boost/preprocessor/repetition/for.hpp></a>
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||||
</div>
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||||
<h4>Sample Code</h4>
|
||||
<div><pre>
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||||
#include <<a href="../headers/arithmetic/dec.html">boost/preprocessor/arithmetic/dec.hpp</a>>
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||||
<head>
|
||||
<meta content="text/html; charset=windows-1252" http-equiv="content-type">
|
||||
<title>BOOST_PP_FOR_r</title>
|
||||
<link rel="stylesheet" type="text/css" href="../styles.css">
|
||||
</head>
|
||||
<body>
|
||||
<div style="margin-left: 0px;"> The <b>BOOST_PP_FOR_<i>r</i></b> macro
|
||||
represents a reentry into the <b>BOOST_PP_FOR</b> repetition construct. </div>
|
||||
<h4>Usage</h4>
|
||||
<div class="code"> <b>BOOST_PP_FOR_</b> ## <i>r</i>(<i>state</i>, <i>pred</i>,
|
||||
<i>op</i>, <i>macro</i>) </div>
|
||||
<h4>Arguments</h4>
|
||||
<dl>
|
||||
<dt>r</dt>
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||||
<dd> The next available <b>BOOST_PP_FOR</b> repetition. </dd>
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||||
<dt>state</dt>
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||||
<dd> The initial state. </dd>
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||||
<dt>pred</dt>
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||||
<dd> A binary predicate of the form <i>pred</i>(<i>r</i>, <i>state</i>).
|
||||
This macro must expand to an integer in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
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||||
<b>BOOST_PP_FOR</b> repeatedly expands <i>macro</i> while this
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predicate returns non-zero. This macro is called with the next
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available <b>BOOST_PP_FOR</b> repetition and the current <i>state</i>.
|
||||
</dd>
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||||
<dt>op</dt>
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||||
<dd> A binary operation of the form <i>op</i>(<i>r</i>, <i>state</i>).
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This operation is expanded by <b>BOOST_PP_FOR</b> with the next
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available <b>BOOST_PP_FOR</b> repetition and the current <i>state</i>.
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This macro is repeatedly applied to the <i>state</i>, each time
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producing a new <i>state</i>, until <i>pred</i> returns <i>0</i>. </dd>
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||||
<dt>macro</dt>
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||||
<dd> A binary macro of the form <i>macro</i>(<i>r</i>, <i>state</i>).
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This macro is expanded by <b>BOOST_PP_FOR</b> with the next available <b>BOOST_PP_FOR</b>
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repetition and the current <i>state</i>. This macro is is
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repeated by <b>BOOST_PP_FOR</b> until <i>pred</i> returns <i>0</i>. </dd>
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||||
</dl>
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<h4>Remarks</h4>
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||||
<div> This macro expands to the sequence:
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<div> <i>macro</i>(<i>r</i>, <i>state</i>) <i>macro</i>(<i>r</i>, <i>op</i>(<i>r</i>,
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||||
<i>state</i>)) ... <i>macro</i>(<i>r</i>, <i>op</i>(<i>r</i>, ... <i>op</i>(<i>r</i>,
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||||
<i>state</i>) ... )) </div>
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||||
</div>
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||||
<div> At certain times, it may be necessary to perform the concatenation
|
||||
with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting
|
||||
operator. This happens when the <i>r</i> value is a macro
|
||||
invocation itself. It needs a delay to allow it to expand. The
|
||||
syntax in such a scenario becomes:
|
||||
<div> <b>BOOST_PP_CAT</b>(<b>BOOST_PP_FOR_</b>, <i>r</i>)(<i>state</i>,
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||||
<i>pred</i>, <i>op</i>, <i>macro</i>) </div>
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||||
</div>
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||||
<h4>See Also</h4>
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||||
<ul>
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||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
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||||
<li><a href="for.html">BOOST_PP_FOR</a></li>
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||||
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
|
||||
<li><a href="for_r_macros.html"><span style="color: gray;">Macros with R
|
||||
re-entrancy forms</span></a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
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||||
<div> <b>Header:</b> <a href="../headers/repetition/for.html"><boost/preprocessor/repetition/for.hpp></a>
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||||
</div>
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||||
<h4>Sample Code</h4>
|
||||
<div>
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||||
<pre>#include <<a href="../headers/arithmetic/dec.html">boost/preprocessor/arithmetic/dec.hpp</a>>
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||||
#include <<a href="../headers/arithmetic/inc.html">boost/preprocessor/arithmetic/inc.hpp</a>>
|
||||
#include <<a href="../headers/comparison/not_equal.html">boost/preprocessor/comparison/not_equal.hpp</a>>
|
||||
#include <<a href="../headers/punctuation/comma_if.html">boost/preprocessor/punctuation/comma_if.hpp</a>>
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||||
@ -140,16 +133,14 @@ TEMPLATE_TEMPLATE(2, 4, T)
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template<class, class, class, class> class T4
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||||
*/
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||||
</pre></div>
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||||
<hr size="1">
|
||||
<div style="margin-left: 0px;">
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||||
<i><EFBFBD> Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
|
||||
</br><i><EFBFBD> Copyright Paul Mensonides 2002</i>
|
||||
</div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
<hr size="1">
|
||||
<div style="margin-left: 0px;"> <i><EFBFBD> Copyright <a href="http://www.housemarque.com"
|
||||
target="_top">Housemarque Oy</a> 2002</i> <br>
|
||||
<i><EFBFBD> Copyright Paul Mensonides 2002</i> </div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
</html>
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||||
|
@ -1,67 +1,59 @@
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<html>
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||||
<head>
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||||
<title>BOOST_PP_REPEAT_z</title>
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||||
<link rel="stylesheet" type="text/css" href="../styles.css">
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||||
</head>
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||||
<body>
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||||
<div style="margin-left: 0px;">
|
||||
The <b>BOOST_PP_REPEAT_<i>z</i></b> macro represents a reentry into the <b>BOOST_PP_REPEAT</b> repetition construct.
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||||
</div>
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||||
<h4>Usage</h4>
|
||||
<div class="code">
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||||
<b>BOOST_PP_REPEAT_</b> ## <i>z</i>(<i>count</i>, <i>macro</i>, <i>data</i>)
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</div>
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||||
<h4>Arguments</h4>
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||||
<dl>
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<dt>z</dt>
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||||
<dd>
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The next available <b>BOOST_PP_REPEAT</b> dimension.
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||||
</dd>
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<dt>count</dt>
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||||
<dd>
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The number of repetitious calls to <i>macro</i>.
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||||
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>.
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||||
</dd>
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||||
<dt>macro</dt>
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||||
<dd>
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||||
A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>).
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||||
This macro is expanded by <b>BOOST_PP_REPEAT</b> with the next available repetition depth,
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the current repetition number, and the auxiliary <i>data</i> argument.
|
||||
</dd>
|
||||
<dt>data</dt>
|
||||
<dd>
|
||||
Auxiliary data passed to <i>macro</i>.
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||||
</dd>
|
||||
</dl>
|
||||
<h4>Remarks</h4>
|
||||
<div>
|
||||
This macro expands to the sequence:
|
||||
<div>
|
||||
<i>macro</i>(<i>z</i>, <i>0</i>, <i>data</i>) <i>macro</i>(<i>z</i>, <i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>count</i> - <i>1</i>, <i>data</i>)
|
||||
</div>
|
||||
</div>
|
||||
<div>
|
||||
At certain times, it may be necessary to perform the concatenation with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting operator.
|
||||
This happens when the <i>z</i> value is a macro invocation itself.
|
||||
It needs a delay to allow it to expand.
|
||||
The syntax in such a scenario becomes:
|
||||
<div>
|
||||
<b>BOOST_PP_CAT</b>(<b>BOOST_PP_REPEAT_</b>, <i>z</i>)(<i>count</i>, <i>macro</i>, <i>data</i>)
|
||||
</div>
|
||||
</div>
|
||||
<h4>See Also</h4>
|
||||
<ul>
|
||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
|
||||
<li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li>
|
||||
<li><a href="repeat.html">BOOST_PP_REPEAT</a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
|
||||
<div>
|
||||
<b>Header:</b> <a href="../headers/repetition/repeat.html"><boost/preprocessor/repetition/repeat.hpp></a>
|
||||
</div>
|
||||
<h4>Sample Code</h4>
|
||||
<div><pre>
|
||||
#include <<a href="../headers/arithmetic/inc.html">boost/preprocessor/arithmetic/inc.hpp</a>>
|
||||
<head>
|
||||
<meta content="text/html; charset=windows-1252" http-equiv="content-type">
|
||||
<title>BOOST_PP_REPEAT_z</title>
|
||||
<link rel="stylesheet" type="text/css" href="../styles.css">
|
||||
</head>
|
||||
<body>
|
||||
<div style="margin-left: 0px;"> The <b>BOOST_PP_REPEAT_<i>z</i></b> macro
|
||||
represents a reentry into the <b>BOOST_PP_REPEAT</b> repetition
|
||||
construct. </div>
|
||||
<h4>Usage</h4>
|
||||
<div class="code"> <b>BOOST_PP_REPEAT_</b> ## <i>z</i>(<i>count</i>, <i>macro</i>,
|
||||
<i>data</i>) </div>
|
||||
<h4>Arguments</h4>
|
||||
<dl>
|
||||
<dt>z</dt>
|
||||
<dd> The next available <b>BOOST_PP_REPEAT</b> dimension. </dd>
|
||||
<dt>count</dt>
|
||||
<dd> The number of repetitious calls to <i>macro</i>. Valid values
|
||||
range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>. </dd>
|
||||
<dt>macro</dt>
|
||||
<dd> A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>).
|
||||
This macro is expanded by <b>BOOST_PP_REPEAT</b> with the next
|
||||
available repetition depth, the current repetition number, and the
|
||||
auxiliary <i>data</i> argument. </dd>
|
||||
<dt>data</dt>
|
||||
<dd> Auxiliary data passed to <i>macro</i>. </dd>
|
||||
</dl>
|
||||
<h4>Remarks</h4>
|
||||
<div> This macro expands to the sequence:
|
||||
<div> <i>macro</i>(<i>z</i>, <i>0</i>, <i>data</i>) <i>macro</i>(<i>z</i>,
|
||||
<i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>count</i> - <i>1</i>,
|
||||
<i>data</i>) </div>
|
||||
</div>
|
||||
<div> At certain times, it may be necessary to perform the concatenation
|
||||
with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting
|
||||
operator. This happens when the <i>z</i> value is a macro
|
||||
invocation itself. It needs a delay to allow it to expand. The
|
||||
syntax in such a scenario becomes:
|
||||
<div> <b>BOOST_PP_CAT</b>(<b>BOOST_PP_REPEAT_</b>, <i>z</i>)(<i>count</i>,
|
||||
<i>macro</i>, <i>data</i>) </div>
|
||||
</div>
|
||||
<h4>See Also</h4>
|
||||
<ul>
|
||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
|
||||
<li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li>
|
||||
<li><a href="repeat.html">BOOST_PP_REPEAT</a></li>
|
||||
<li><a href="repeat_z_macros.html"><span style="color: gray;">Macros with
|
||||
Z re-entrancy forms</span></a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
|
||||
<div> <b>Header:</b> <a href="../headers/repetition/repeat.html"><boost/preprocessor/repetition/repeat.hpp></a>
|
||||
</div>
|
||||
<h4>Sample Code</h4>
|
||||
<div>
|
||||
<pre>#include <<a href="../headers/arithmetic/inc.html">boost/preprocessor/arithmetic/inc.hpp</a>>
|
||||
#include <<a href="../headers/punctuation/comma_if.html">boost/preprocessor/punctuation/comma_if.hpp</a>>
|
||||
#include <<a href="../headers/repetition/repeat.html">boost/preprocessor/repetition/repeat.hpp</a>>
|
||||
|
||||
@ -85,16 +77,14 @@
|
||||
template<class, class, class> class T2
|
||||
*/
|
||||
</pre></div>
|
||||
<hr size="1">
|
||||
<div style="margin-left: 0px;">
|
||||
<i><EFBFBD> Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
|
||||
</br><i><EFBFBD> Copyright Paul Mensonides 2002</i>
|
||||
</div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
<hr size="1">
|
||||
<div style="margin-left: 0px;"> <i><EFBFBD> Copyright <a href="http://www.housemarque.com"
|
||||
target="_top">Housemarque Oy</a> 2002</i> <br>
|
||||
<i><EFBFBD> Copyright Paul Mensonides 2002</i> </div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
@ -1,78 +1,66 @@
|
||||
<html>
|
||||
<head>
|
||||
<title>BOOST_PP_WHILE_d</title>
|
||||
<link rel="stylesheet" type="text/css" href="../styles.css">
|
||||
</head>
|
||||
<body>
|
||||
<div style="margin-left: 0px;">
|
||||
The <b>BOOST_PP_WHILE_<i>d</i></b> macro represents a reentry into the <b>BOOST_PP_WHILE</b> looping construct.
|
||||
</div>
|
||||
<h4>Usage</h4>
|
||||
<div class="code">
|
||||
<b>BOOST_PP_WHILE_</b> ## <i>d</i>(<i>pred</i>, <i>op</i>, <i>state</i>)
|
||||
</div>
|
||||
<h4>Arguments</h4>
|
||||
<dl>
|
||||
<dt>d</dt>
|
||||
<dd>
|
||||
The next available <b>BOOST_PP_WHILE</b> iteration.
|
||||
</dd>
|
||||
<dt>pred</dt>
|
||||
<dd>
|
||||
A binary predicate of the form <i>pred</i>(<i>d</i>, <i>state</i>).
|
||||
This predicate is expanded by <b>BOOST_PP_WHILE</b> with the next available
|
||||
iteration <i>d</i> and the current <i>state</i>.
|
||||
This predicate must expand to value in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
|
||||
The construct continues to loop until this predicate returns <i>0</i>.
|
||||
When this predicate returns <i>0</i>, <b>BOOST_PP_WHILE</b> returns the current <i>state</i>.
|
||||
</dd>
|
||||
<dt>op</dt>
|
||||
<dd>
|
||||
A binary operation of the form <i>op</i>(<i>d</i>, <i>state</i>).
|
||||
This operation is expanded by <b>BOOST_PP_WHILE</b> with the next available
|
||||
iteration <i>d</i> and the current <i>state</i>.
|
||||
This macro is repeatedly applied to the <i>state</i>, each time producing a new <i>state</i>, until <i>pred</i> returns <i>0</i>.
|
||||
</dd>
|
||||
<dt>state</dt>
|
||||
<dd>
|
||||
The initial state.
|
||||
Often this argument is a <i>tuple</i>.
|
||||
</dd>
|
||||
</dl>
|
||||
<h4>Remarks</h4>
|
||||
<div>
|
||||
This macro iterates <i>op</i>(<i>d</i>, <i>state</i>) while <i>pred</i>(<i>d</i>, <i>state</i>) is non-zero.
|
||||
In other words expands to:
|
||||
<div>
|
||||
<i>op</i>(<i>d</i>, ... <i>op</i>(<i>d</i>, <i>op</i>(<i>d</i>, <i>state</i>)) ... ).
|
||||
</div>
|
||||
</div>
|
||||
<div>
|
||||
At certain times, it may be necessary to perform the concatenation with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting operator.
|
||||
This happens when the <i>d</i> value is a macro invocation itself.
|
||||
It needs a delay to allow it to expand.
|
||||
The syntax in such a scenario becomes:
|
||||
<div>
|
||||
<b>BOOST_PP_CAT</b>(<b>BOOST_PP_WHILE_</b>, <i>d</i>)(<i>pred</i>, <i>op</i>, <i>state</i>).
|
||||
</div>
|
||||
</div>
|
||||
<div>
|
||||
Previously, it was possible to concatenate <i>d</i> directly to <b>BOOST_PP_WHILE</b> (without the trailing underscore).
|
||||
This is no longer supported.
|
||||
</div>
|
||||
<h4>See Also</h4>
|
||||
<ul>
|
||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
|
||||
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
|
||||
<li><a href="while.html">BOOST_PP_WHILE</a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
|
||||
<div>
|
||||
<b>Header:</b> <a href="../headers/control/while.html"><boost/preprocessor/control/while.hpp></a>
|
||||
</div>
|
||||
<h4>Sample Code</h4>
|
||||
<div><pre>
|
||||
#include <<a href="../headers/arithmetic/add.html">boost/preprocessor/arithmetic/add.hpp</a>>
|
||||
<head>
|
||||
<meta content="text/html; charset=windows-1252" http-equiv="content-type">
|
||||
<title>BOOST_PP_WHILE_d</title>
|
||||
<link rel="stylesheet" type="text/css" href="../styles.css">
|
||||
</head>
|
||||
<body>
|
||||
<div style="margin-left: 0px;"> The <b>BOOST_PP_WHILE_<i>d</i></b> macro
|
||||
represents a reentry into the <b>BOOST_PP_WHILE</b> looping construct. </div>
|
||||
<h4>Usage</h4>
|
||||
<div class="code"> <b>BOOST_PP_WHILE_</b> ## <i>d</i>(<i>pred</i>, <i>op</i>,
|
||||
<i>state</i>) </div>
|
||||
<h4>Arguments</h4>
|
||||
<dl>
|
||||
<dt>d</dt>
|
||||
<dd> The next available <b>BOOST_PP_WHILE</b> iteration. </dd>
|
||||
<dt>pred</dt>
|
||||
<dd> A binary predicate of the form <i>pred</i>(<i>d</i>, <i>state</i>).
|
||||
This predicate is expanded by <b>BOOST_PP_WHILE</b> with the next
|
||||
available iteration <i>d</i> and the current <i>state</i>. This
|
||||
predicate must expand to value in the range of <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
|
||||
The construct continues to loop until this predicate returns <i>0</i>.
|
||||
When this predicate returns <i>0</i>, <b>BOOST_PP_WHILE</b> returns
|
||||
the current <i>state</i>. </dd>
|
||||
<dt>op</dt>
|
||||
<dd> A binary operation of the form <i>op</i>(<i>d</i>, <i>state</i>).
|
||||
This operation is expanded by <b>BOOST_PP_WHILE</b> with the next
|
||||
available iteration <i>d</i> and the current <i>state</i>. This
|
||||
macro is repeatedly applied to the <i>state</i>, each time producing a
|
||||
new <i>state</i>, until <i>pred</i> returns <i>0</i>. </dd>
|
||||
<dt>state</dt>
|
||||
<dd> The initial state. Often this argument is a <i>tuple</i>. </dd>
|
||||
</dl>
|
||||
<h4>Remarks</h4>
|
||||
<div> This macro iterates <i>op</i>(<i>d</i>, <i>state</i>) while <i>pred</i>(<i>d</i>,
|
||||
<i>state</i>) is non-zero. In other words expands to:
|
||||
<div> <i>op</i>(<i>d</i>, ... <i>op</i>(<i>d</i>, <i>op</i>(<i>d</i>, <i>state</i>))
|
||||
... ). </div>
|
||||
</div>
|
||||
<div> At certain times, it may be necessary to perform the concatenation
|
||||
with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting
|
||||
operator. This happens when the <i>d</i> value is a macro
|
||||
invocation itself. It needs a delay to allow it to expand. The
|
||||
syntax in such a scenario becomes:
|
||||
<div> <b>BOOST_PP_CAT</b>(<b>BOOST_PP_WHILE_</b>, <i>d</i>)(<i>pred</i>,
|
||||
<i>op</i>, <i>state</i>). </div>
|
||||
</div>
|
||||
<div> Previously, it was possible to concatenate <i>d</i> directly to <b>BOOST_PP_WHILE</b>
|
||||
(without the trailing underscore). This is no longer supported. </div>
|
||||
<h4>See Also</h4>
|
||||
<ul>
|
||||
<li><a href="cat.html">BOOST_PP_CAT</a></li>
|
||||
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
|
||||
<li><a href="while.html">BOOST_PP_WHILE</a></li>
|
||||
<li><a href="while_d_macros.html"><span style="color: gray;">Macros with D
|
||||
re-entrancy forms</span></a></li>
|
||||
</ul>
|
||||
<h4>Requirements</h4>
|
||||
<div> <b>Header:</b> <a href="../headers/control/while.html"><boost/preprocessor/control/while.hpp></a>
|
||||
</div>
|
||||
<h4>Sample Code</h4>
|
||||
<div>
|
||||
<pre>#include <<a href="../headers/arithmetic/add.html">boost/preprocessor/arithmetic/add.hpp</a>>
|
||||
#include <<a href="../headers/arithmetic/dec.html">boost/preprocessor/arithmetic/dec.hpp</a>>
|
||||
#include <<a href="../headers/array/elem.html">boost/preprocessor/array/elem.hpp</a>>
|
||||
#include <<a href="../headers/array/size.html">boost/preprocessor/array/size.hpp</a>>
|
||||
@ -114,16 +102,14 @@
|
||||
|
||||
ACCUMULATE_D(1, ARRAY)// expands to 10
|
||||
</pre></div>
|
||||
<hr size="1">
|
||||
<div style="margin-left: 0px;">
|
||||
<i><EFBFBD> Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
|
||||
</br><i><EFBFBD> Copyright Paul Mensonides 2002</i>
|
||||
</div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
<hr size="1">
|
||||
<div style="margin-left: 0px;"> <i><EFBFBD> Copyright <a href="http://www.housemarque.com"
|
||||
target="_top">Housemarque Oy</a> 2002</i> <br>
|
||||
<i><EFBFBD> Copyright Paul Mensonides 2002</i> </div>
|
||||
<div style="margin-left: 0px;">
|
||||
<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>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
Reference in New Issue
Block a user