std::experimental::negation (3) - Linux Manuals

std::experimental::negation: std::experimental::negation

NAME

std::experimental::negation - std::experimental::negation

Synopsis


Defined in header <experimental/type_traits>
template<class B> (1) (library fundamentals TS v2)
struct negation;


Forms the logical negation of the type trait B.
The type negation<B> is a UnaryTypeTrait with a BaseCharacteristic of std::integral_constant<bool, !bool(B::value)>.

Template parameters


B - any type such that the expression bool(B::value) is a valid constant expression


Helper variable template


template<class B> (library fundamentals TS v2)
constexpr bool negation_v = negation<B>::value;


Inherited from std::integral_constant

Member constants


value true if B has a member ::value such that !bool(B::value) is true , false otherwise
         (public static member constant)
[static]

Member functions


              converts the object to bool, returns value
operator bool (public member function)


operator() returns value
              (public member function)
(C++14)

Member types


Type Definition
value_type bool
type std::integral_constant<bool, value>

Possible implementation


  template<class B>
  struct negation : std::integral_constant<bool, !bool(B::value)> { };

Example


 This section is incomplete
 Reason: no example

See also


negation logical NOT metafunction
         (class template)
(C++17)