Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns the result type of filter_if given the sequence and unary MPL Lambda Expression predicate type.
template< typename Sequence, typename Pred > struct filter_if { typedef unspecified type; };
Table 1.74. Parameter
|
Parameter |
Requirement |
Description |
|---|---|---|
|
Sequence |
A model of Forward Sequence |
Operation's argument |
|
Pred |
A unary MPL Lambda Expression |
Type to retain |
result_of::filter_if<Sequence, Pred>::type
Return type: A model of Forward Sequence.
Semantics: Returns a sequence containing the elements of Sequence for which Pred evaluates to boost::mpl::true_.
Constant.
#include <boost/fusion/algorithm/transformation/filter_if.hpp> #include <boost/fusion/include/filter_if.hpp>