bslmf::InvokeResultDeductionFailed Struct Reference

#include <bslmf_invokeresult.h>

Public Member Functions
template<class t_TYPE >
	InvokeResultDeductionFailed (const t_TYPE &)

Detailed Description

When invoke_result cannot deduce the actual return type of a functor (in C++03 mode), it yields this type as a placeholder. The advantage of using this placeholder instead of a compilation failure (e.g., using a static assert) is that the return type of an INVOKE() operation is often discarded, so our failure to deduce the return type is often harmless. Since InvokeResultDeductionFailed is a return type, it must be convertible from the actual return type; this conversion is accomplished by means of a constructor that makes it convertible from any type.

Constructor & Destructor Documentation

InvokeResultDeductionFailed()

template<class t_TYPE >

bslmf::InvokeResultDeductionFailed::InvokeResultDeductionFailed ( const t_TYPE &  )

inline

Convert from an arbitrary type. The actual argument value is discarded.

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

• bslmf_invokeresult.h