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BDE 4.39.x Production Release
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#include <bslmf_isempty.h>
Private class: do not use outside of bslmf_isempty component. This meta-function provides an initial dispatch that always derives from false_type unless the template parameter t_TYPE is a class type, as only class types can be empty. The following partial specialization forwards all class types to a final test. This two-phase dispatch is necessary as some types, such as void and function types, cannot be passed to a sizeof operator that is used to implement the next stage of matching.
Additional Inherited Members | |
Public Types inherited from bsl::integral_constant< t_TYPE, t_VALUE > | |
| typedef t_TYPE | value_type |
| typedef integral_constant | type |
Public Member Functions inherited from bsl::integral_constant< t_TYPE, t_VALUE > | |
| integral_constant ()=default | |
| integral_constant (const integral_constant &)=default | |
| integral_constant | operator= (const integral_constant &)=default |
| ~integral_constant ()=default | |
| operator value_type () const | |
| value_type | operator() () const |
Static Public Attributes inherited from bsl::integral_constant< t_TYPE, t_VALUE > | |
| static const t_TYPE | value = t_VALUE |