Meta-function for detecting whether two types are the same.
Declared in <bslmf_issame.h>
template<
class t_TYPE1,
class t_TYPE2>
struct is_same
: false_typeThis struct template provides a meta-function to determine whether the (template parameter) t_TYPE1 and the (template parameter) t_TYPE2 are the same. This generic default template derives from bsl::false_type. A template specialization is provided (below) that derives from bsl::true_type.
| Name | Description |
|---|---|
false_type | Metafunction representing the boolean constant false. |
| Name | Description |
|---|---|
is_same<t_TYPE, t_TYPE> | This partial specialization of is_same derives from bsl::true_type for when the (template parameter) types are the same. |
| Name | Description |
|---|---|
Variant_IsSameReturnType<t_RET, t_VISITOR, t_VARIANT, 0> | Check the return type of invoking t_VISITOR on alternative 0. |