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

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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:

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>

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