transform

Description

Returns the result type of transform, given the types of the input sequence and unary Polymorphic Function Object.

Unary version synopsis

template<
    typename Sequence,
    typename F
    >
struct transform
{
    typedef unspecified type;
};

Table 1.89. Parameters

Parameter	Requirement	Description
`Sequence`	A model of Forward Sequence	Operation's argument
`F`	A model of unary Polymorphic Function Object	Transformation metafunction

Expression Semantics

result_of::transform<Sequence, F>::type

Return type:

A model of Forward Sequence
A model of Associative Sequence if Sequence implements the Associative Sequence model.

Semantics: Returns a sequence that contains the types of __result_of__<F(E)>::type for each element E within Sequence.

Binary version synopsis

template<
    typename Sequence1,
    typename Sequence2,
    typename F
    >
struct transform
{
      typedef unspecified type;
};

Table 1.90. Parameters

Parameter	Requirement	Description
`Sequence1`	A model of Forward Sequence	Operation's argument
`Sequence2`	A model of Forward Sequence	Operation's argument
`F`	A model of binary Polymorphic Function Object	Transformation metafunction

Expression Semantics

result_of::transform<Sequence1, Sequence2, F>::type

Return type: A model of Forward Sequence.

Semantics: Returns a sequence, that contains the types of __result_of__<F(E1, E2)>::type for each pair of elements E1 and E2 within Sequence1 and Sequence2 respectively.

Complexity

Constant.

Header

#include <boost/fusion/algorithm/transformation/transform.hpp>
#include <boost/fusion/include/transform.hpp>