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<Head>
<Title>remove_copy_if</Title>
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<H1>remove_copy_if</H1>
<Table CellPadding=0 CellSpacing=0 width=100%>
<TR>
<TD Align=left><Img src = "algorithms.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD>
<TD Align=right><Img src = "function.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD>
</TR>
<TR>
<TD Align=left VAlign=top><b>Category</b>: algorithms</TD>
<TD Align=right VAlign=top><b>Component type</b>: function</TD>
</TR>
</Table>
<h3>Prototype</h3>
<pre>
template <class <A href="InputIterator.html">InputIterator</A>, class <A href="OutputIterator.html">OutputIterator</A>, class <A href="Predicate.html">Predicate</A>>
OutputIterator remove_copy_if(InputIterator first, InputIterator last,
OutputIterator result, Predicate pred);
</pre>
<h3>Description</h3>
<tt>Remove_copy_if</tt> copies elements from the range <tt>[first, last)</tt> to a
range beginning at <tt>result</tt>, except that elements for which <tt>pred</tt>
is <tt>true</tt> are not copied. The return
value is the end of the resulting range. This operation is stable,
meaning that the relative order of the elements that are copied is the same
as in the range <tt>[first, last)</tt>.
<h3>Definition</h3>
Defined in the standard header <A href="algorithm">algorithm</A>, and in the nonstandard
backward-compatibility header <A href="algo.h">algo.h</A>.
<h3>Requirements on types</h3>
<UL>
<LI>
<tt>InputIterator</tt> is a model of <A href="InputIterator.html">Input Iterator</A>.
<LI>
<tt>OutputIterator</tt> is a model of <A href="OutputIterator.html">Output Iterator</A>.
<LI>
<tt>InputIterator</tt>'s value type is convertible to a type in
<tt>OutputIterator</tt>'s set of value types.
<LI>
<tt>Predicate</tt> is a model of <A href="Predicate.html">Predicate</A>.
<LI>
<tt>InputIterator</tt>'s value type is convertible to <tt>Predicate</tt>'s argument
type.
</UL>
<h3>Preconditions</h3>
<UL>
<LI>
<tt>[first, last)</tt> is a valid range.
<LI>
There is enough space in the output range to store the copied
values. That is, if there are <tt>n</tt> elements in <tt>[first, last)</tt>
that do not satisfy <tt>pred</tt>, then <tt>[result, result+n)</tt> is
a valid range.
<LI>
<tt>result</tt> is not an iterator in the range <tt>[first, last)</tt>.
</UL>
<h3>Complexity</h3>
Linear. Exactly <tt>last - first</tt> applications of <tt>pred</tt>, and at most
<tt>last - first</tt> assignments.
<h3>Example</h3>
Fill a vector with the nonnegative elements of another vector.
<pre>
<A href="Vector.html">vector</A><int> V1;
V.push_back(-2);
V.push_back(0);
V.push_back(-1);
V.push_back(0);
V.push_back(1);
V.push_back(2);
<A href="Vector.html">vector</A><int> V2;
remove_copy_if(V1.begin(), V1.end(),
<A href="back_insert_iterator.html">back_inserter</A>(V2),
<A href="binder2nd.html">bind2nd</A>(<A href="less.html">less</A><int>(), 0));
</pre>
<h3>Notes</h3>
<h3>See also</h3>
<tt><A href="copy.html">copy</A></tt>, <tt><A href="remove.html">remove</A></tt>, <tt><A href="remove_if.html">remove_if</A></tt>, <tt><A href="remove_copy.html">remove_copy</A></tt>,
<tt><A href="unique.html">unique</A></tt>, <tt><A href="unique_copy.html">unique_copy</A></tt>.
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