bdlb::Variant_ReturnValueHelper< VISITOR > Struct Template Reference

#include <bdlb_variant.h>

List of all members.

Public Types
enum	{ value, VALUE }
Static Public Member Functions
template<class T >
static Variant_ReturnValueHelper_YesType	match (typename bsl::remove_reference< typename T::ResultType >::type *)
template<class T >
static Variant_ReturnValueHelper_NoType	match (...)

---

Detailed Description

template<class VISITOR>
struct bdlb::Variant_ReturnValueHelper< VISITOR >

This struct is a component-private meta-function. Do not use. This meta-function checks whether the template parameter type VISITOR has the member ResultType defined using "SFINAE" (Substitution Failure Is Not An Error).

See Component bdlb_variant

---

Member Enumeration Documentation

template<class VISITOR >

anonymous enum

Enumerator:

value
VALUE

---

Member Function Documentation

template<class VISITOR >

template<class T >

static Variant_ReturnValueHelper_YesType bdlb::Variant_ReturnValueHelper< VISITOR >::match

(

typename bsl::remove_reference< typename T::ResultType >::type *

)

[static]

template<class VISITOR >

template<class T >

static Variant_ReturnValueHelper_NoType bdlb::Variant_ReturnValueHelper< VISITOR >::match

(

...

)

[static]

Return YesType if T::ResultType exists, and NoType otherwise. Note that if T::ResultType exists, then the first function is a better match than the ellipsis version.

---

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

• bdlb_variant.h