DGtal::detail::HasNestedTypeCategory< T > Struct Template Reference

Aim: Checks whether type T has a nested type called 'Category' or not. NB: from en.wikipedia.org/wiki/Substitution_failure_is_not_an_error NB: to avoid various compiler issues, we use BOOST_STATIC_CONSTANT according to http://www.boost.org/development/int_const_guidelines.html. More...

#include <DGtal/base/ContainerTraits.h>

Public Types
typedef char	yes[1]
typedef char	no[2]

Public Member Functions
	BOOST_STATIC_CONSTANT (bool, value=sizeof(test< T >(0))==sizeof(yes))

Static Public Member Functions
template<typename C >
static yes &	test (typename C::Category *)
template<typename C >
static no &	test (...)

Detailed Description

template<typename T>
struct DGtal::detail::HasNestedTypeCategory< T >

Aim: Checks whether type T has a nested type called 'Category' or not. NB: from en.wikipedia.org/wiki/Substitution_failure_is_not_an_error NB: to avoid various compiler issues, we use BOOST_STATIC_CONSTANT according to http://www.boost.org/development/int_const_guidelines.html.

Description of template class 'HasNestedTypeCategory'

Template Parameters

T

any type.

Definition at line 223 of file ContainerTraits.h.

Member Typedef Documentation

no

template<typename T >

typedef char DGtal::detail::HasNestedTypeCategory< T >::no[2]

Definition at line 226 of file ContainerTraits.h.

yes

template<typename T >

typedef char DGtal::detail::HasNestedTypeCategory< T >::yes[1]

Definition at line 225 of file ContainerTraits.h.

Member Function Documentation

BOOST_STATIC_CONSTANT()

template<typename T >

DGtal::detail::HasNestedTypeCategory< T >::BOOST_STATIC_CONSTANT	(	bool	,
		value	= sizeof(test< T >(0))==sizeof(yes)
	)

test() [1/2]

template<typename T >

template<typename C >

static no& DGtal::detail::HasNestedTypeCategory< T >::test (   ... )

static

test() [2/2]

template<typename T >

template<typename C >

static yes& DGtal::detail::HasNestedTypeCategory< T >::test ( typename C::Category *  )

static

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

• ContainerTraits.h