mirror of
https://github.com/boostorg/mpl.git
synced 2026-01-26 17:02:20 +01:00
59 lines
2.8 KiB
HTML
59 lines
2.8 KiB
HTML
<!doctype html public "-//ietf//dtd html//en">
|
|
<html><head><title>boost::mpl::remove_if</title>
|
|
<link rel="stylesheet" href="../mpl_wiki.css">
|
|
</head><body bgcolor="white">
|
|
<h1><a href="../Table_of_Contents.html"><img src="../mpl_logo.jpg" alt="[Home]" border=0 align="right"></a>remove_if</h1><h3>Synopsis</h3>
|
|
<p>
|
|
<pre>
|
|
template<
|
|
typename Sequence
|
|
, typename Pred
|
|
>
|
|
struct remove_if
|
|
{
|
|
typedef <em>unspecified</em> type;
|
|
};
|
|
</pre>
|
|
<p>
|
|
<h3>Description</h3>
|
|
<p>
|
|
Returns a new sequence which contains all the elements from <code>[begin<Sequence>::type, end<Sequence>::type)</code> range except those that satisfy the predicate <code>Pred</code>. The result sequence preserves all the functional and performance characteristics of the original <code>Sequence</code>, except its size and identity.
|
|
<p>
|
|
<h3>Definition</h3>
|
|
<p>
|
|
<pre>
|
|
#include "<a href="../../../../../boost/mpl/remove_if.hpp">boost/mpl/remove_if.hpp</a>"
|
|
</pre>
|
|
<p>
|
|
<h3>Parameters</h3>
|
|
<table border="1">
|
|
<tr><th> Parameter </th><th> Requirement </th><th> Description </th></tr>
|
|
<tr><td><code>Sequence</code></td><td>A model of <a href="../Extensible_Sequence.html">Extensible Sequence</a></td><td>The original sequence. </td></tr>
|
|
<tr><td><code>Pred</code></td><td>An unary Predicate [Lambda Expression]</td><td>A removal condition. </td></tr>
|
|
</table>
|
|
<p>
|
|
<h3>Expression semantics</h3>
|
|
<p>
|
|
<table border="1">
|
|
<tr><th> Expression </th><th> Expression type </th><th> Precondition </th><th> Semantics </th><th> Postcondition </th></tr>
|
|
<tr><td><code>typedef remove_if<Sequence,Pred>::type s;</code></td><td>A model of <a href="../Extensible_Sequence.html">Extensible Sequence</a></td><td></td><td></td><td></td></tr>
|
|
</table>
|
|
<p>
|
|
<h3>Complexity</h3>
|
|
<p>
|
|
Linear. Performs exactly <code><a href="../Reference/size.html">size</a><Sequence>::type::value</code> applications of <code>Pred</code>.
|
|
<p>
|
|
<h3>Example</h3>
|
|
<p>
|
|
<pre>
|
|
typedef <a href="../Reference/list_c.html">list_c</a><int,1,4,5,2,7,5,3,5>::type numbers;
|
|
typedef remove_if< numbers, greater<_,4> >::type result;
|
|
typedef <a href="../Reference/list_c.html">list_c</a><int,1,4,2,3>::type answer;
|
|
BOOST_STATIC_ASSERT((<a href="../Reference/equal.html">equal</a>< answer,result,<a href="../Reference/equal_to.html">equal_to</a><_,_> >::type::value));
|
|
</pre>
|
|
<p>
|
|
<h3>See also</h3>
|
|
<p>
|
|
<a href="../Algorithms.html">Algorithms</a>, <code><a href="../Reference/remove.html">remove</a></code>, <code><a href="../Reference/replace.html">replace</a></code>, <code><a href="../Reference/transform.html">transform</a></code>
|
|
<p><hr>
|
|
<a href="../Table_of_Contents.html">Table of Contents</a><br>Last edited July 17, 2002 8:43 am</body></html> |