count_if

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Boost C++ Libraries

count_if

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A metafunction that returns the result type of count_if given the sequence and predicate types.

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template<
    typename Sequence,
    typename Pred
    >
struct count_if
{
    typedef int type;
};

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Table 1.52. Parameters

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Table 1.52. Parameters

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Table 1.56. Parameters

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Table 1.56. Parameters

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Table 1.56. Parameters

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Table 1.56. Parameters

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Table 1.56. Parameters

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Parameter	Requirement	Description
`Sequence`	A model of Forward Sequence	Operation's argument
`Pred`	A unary function object	Operation's argument

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Expression =======

Expression >>>>>>> .merge-right.r57125 Semantics

result_of::count_if<Sequence, Pred>::type

Return type: int.

Semantics: Returns the return type of count_if. The return type is always int.

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Constant.

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#include <boost/fusion/algorithm/query/count_if.hpp>
#include <boost/fusion/include/count_if.hpp>