boost::proto::is_transform< T > Struct Template Reference

Boolean metafunction which detects whether a type is a PrimitiveTransform type or not. More...

#include <traits.hpp>

Inheritance diagram for boost::proto::is_transform< T >:

Collaboration diagram for boost::proto::is_transform< T >:

Detailed Description

template<typename T>
struct boost::proto::is_transform< T >

Boolean metafunction which detects whether a type is a PrimitiveTransform type or not.

is_transform<> is used by the call<> transform to determine whether the function types R(), R(A1), and R(A1, A2) should be passed the expression, state and data parameters (as needed).

Unless specialized for a type T, is_transform<T>value is computed as follows:

• If T has a nested type proto_is_transform_ that is a typedef for void, is_transform<T>value is true. (Note: this is the case for any type that derives from an instantiation of proto::transform.)
• Otherwise, is_transform<T>value is false.

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The documentation for this struct was generated from the following file:

• boost_1_57_0/boost/proto/proto_fwd.hpp