Metafunction that computes an efficient argument type for forwarding t_TYPE.

Synopsis

Declared in <bslmf_forwardingtype.h>

template<class t_TYPE>
class ForwardingType;

Description

This template metafunction has a member Type computed such that, for a specified t_TYPE parameter, a function with argument of t_TYPE can be called efficiently from another function (e.g., a wrapper) by declaring the corresponding parameter of the other wrapper as 'typename ForwardingType<t_TYPE>::Type'. The Type member is computed to minimize the number of expensive copies while forwarding the arguments as faithfully as possible.

Type Aliases

Name

Description

TargetType

The closest type used to "reconstitute" t_TYPE from ForwardingType<t_TYPE>::Type. This type may differ from t_TYPE through the addition of a reference.

Type

The type that should be used to forward t_TYPE through a chain of function calls.

Derived Classes

Name

Description

ConstForwardingType

DEPRECATED: Use ForwardingType instead.

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