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lib cleanup [SVN r15693]
2002-10-03 22:13:37 +00:00
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<title>BOOST_PP_REPEAT_FROM_TO_D</title>
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<div style="margin-left: 0px;">
The <b>BOOST_PP_REPEAT_FROM_TO_D</b> macro represents a fast horizontal repetition construct.&nbsp;
It reenters <b>BOOST_PP_WHILE</b> with maximum efficiency.
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<h4>Usage</h4>
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<b>BOOST_PP_REPEAT_FROM_TO_D</b>(<i>d</i>, <i>first</i>, <i>last</i>, <i>macro</i>, <i>data</i>)
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<h4>Arguments</h4>
<dl>
<dt>d</dt>
<dd>
The next available <b>BOOST_PP_WHILE</b> iteration.
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<dt>first</dt>
<dd>
The lower bound of the repetition.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
</dd>
<dt>last</dt>
<dd>
The upper bound of the repetition.
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
</dd>
<dt>macro</dt>
<dd>
A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>).&nbsp;
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.&nbsp;
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<dt>data</dt>
<dd>
Auxiliary data passed to <i>macro</i>.
</dd>
</dl>
<h4>Remarks</h4>
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This macro expands to the sequence:
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<i>macro</i>(<i>z</i>, <i>first</i>, <i>data</i>) <i>macro</i>(<i>z</i>, <i>first</i> + <i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>last</i> - <i>1</i>, <i>data</i>)
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The number of repetitions (i.e. <i>last</i> - <i>first</i>) must not exceed <b>BOOST_PP_LIMIT_REPEAT</b>.
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The <i>z</i> value that is passed to <i>macro</i> represents the next available repetition dimension.&nbsp;
Other macros that have <b>_Z</b> suffix variants internally use <b>BOOST_PP_REPEAT</b>--for example, <b>BOOST_PP_ENUM_PARAMS</b> and <b>BOOST_PP_ENUM_PARAMS_Z</b>.&nbsp;
Using these <b>_Z</b> versions is not strictly necessary, but passing the <i>z</i> value (that is passed to <i>macro</i>) to these macros allows them to reenter <b>BOOST_PP_REPEAT</b> with maximum efficiency.
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<div>
To directly use this <i>z</i> value, rather than simply passing it to another macro, see <b>BOOST_PP_REPEAT_FROM_TO_D_<i>z</i></b>.
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<h4>See Also</h4>
<ul>
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
<li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li>
<li><a href="repeat_from_to.html">BOOST_PP_REPEAT_FROM_TO</a></li>
<li><a href="repeat_from_to_d_z.html">BOOST_PP_REPEAT_FROM_TO_D_<i>z</i></a></li>
</ul>
<h4>Requirements</h4>
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headers/xxx.hpp.html >> headers/xxx.html [SVN r25656]
2004-10-11 06:58:45 +00:00
<b>Header:</b> &nbsp;<a href="../headers/repetition/repeat_from_to.html">&lt;boost/preprocessor/repetition/repeat_from_to.hpp&gt;</a>
lib cleanup [SVN r15693]
2002-10-03 22:13:37 +00:00
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