bsl::Is_Empty_Class_Imp< t_TYPE, IS_CLASS > Struct Template Reference

#include <bslmf_isempty.h>

Inheritance diagram for bsl::Is_Empty_Class_Imp< t_TYPE, IS_CLASS >:

Additional Inherited Members
Public Types inherited from bsl::integral_constant< t_TYPE, t_VAL >
typedef t_TYPE	value_type
typedef integral_constant	type
Public Member Functions inherited from bsl::integral_constant< t_TYPE, t_VAL >
	integral_constant ()=default
	integral_constant (const integral_constant &)=default
integral_constant	operator= (const integral_constant &)=default
	~integral_constant ()=default
BSLS_KEYWORD_CONSTEXPR	operator value_type () const BSLS_KEYWORD_NOEXCEPT
	Return t_VAL.
Static Public Attributes inherited from bsl::integral_constant< t_TYPE, t_VAL >
static const t_TYPE	value = t_VAL

Detailed Description

template<class t_TYPE, bool IS_CLASS = sizeof(t_TYPE) == sizeof(Is_Empty_Size)>
struct bsl::Is_Empty_Class_Imp< t_TYPE, IS_CLASS >

Private class: do not use outside of bslmf_isempty component. This meta-function derives from false_type unless (the template parameter) t_TYPE is exactly the same size as a known empty type, in which case the following partial specialization is chosen. This test filters out the majority of problems with union types that are classes, and would produce a hard, non-SFINAEable error trying to a create a derived class to compare size in the next test.

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

• bslmf_isempty.h