108 lines
2.5 KiB
ReStructuredText
108 lines
2.5 KiB
ReStructuredText
.. Algorithms/Transformation Algorithms//reverse_replace |140
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reverse_replace
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===============
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Synopsis
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--------
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.. parsed-literal::
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template<
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typename Sequence
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, typename OldType
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, typename NewType
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, typename In = |unspecified|
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>
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struct reverse_replace
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{
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typedef |unspecified| type;
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};
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Description
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-----------
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Returns a reversed copy of the original sequence where every type identical to ``OldType``
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has been replaced with ``NewType``.
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|transformation algorithm disclaimer|
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Header
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------
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.. parsed-literal::
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#include <boost/mpl/replace.hpp>
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Model of
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--------
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|Reversible Algorithm|
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Parameters
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----------
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+---------------+-----------------------------------+-------------------------------+
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| Parameter | Requirement | Description |
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+===============+===================================+===============================+
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| ``Sequence`` | |Forward Sequence| | A original sequence. |
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+---------------+-----------------------------------+-------------------------------+
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| ``OldType`` | Any type | A type to be replaced. |
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+---------------+-----------------------------------+-------------------------------+
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| ``NewType`` | Any type | A type to replace with. |
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+---------------+-----------------------------------+-------------------------------+
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| ``In`` | |Inserter| | An inserter. |
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+---------------+-----------------------------------+-------------------------------+
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Expression semantics
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--------------------
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|Semantics disclaimer...| |Reversible Algorithm|.
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For any |Forward Sequence| ``s``, an |Inserter| ``in``, and arbitrary types ``x`` and ``y``:
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.. parsed-literal::
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typedef reverse_replace<s,x,y,in>::type r;
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:Return type:
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A type.
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:Semantics:
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Equivalent to
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.. parsed-literal::
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typedef reverse_replace_if< s,y,is_same<_,x>,in >::type r;
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Complexity
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----------
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Linear. Performs exactly ``size<s>::value`` comparisons for
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identity / insertions.
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Example
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-------
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.. parsed-literal::
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typedef vector<int,float,char,float,float,double> types;
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typedef vector<double,double,double,char,double,int> expected;
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typedef reverse_replace< types,float,double >::type result;
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BOOST_MPL_ASSERT(( equal< result,expected > ));
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See also
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--------
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|Transformation Algorithms|, |Reversible Algorithm|, |replace|, |reverse_replace_if|, |remove|, |reverse_transform|
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