std::experimental::negation
From cppreference.com
< cpp | experimental
Defined in header <experimental/type_traits>
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template< class B > struct negation; |
(1) | (library fundamentals TS v2) |
Forms the logical negation of the type trait B
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The type negation<B> is a UnaryTypeTrait with a base characteristic of std::integral_constant<bool, !bool(B::value)>.
Contents |
[edit] Template parameters
B | - | any type such that the expression bool(B::value) is a valid constant expression |
[edit] Helper variable template
template< class B > constexpr bool negation_v = negation<B>::value; |
(library fundamentals TS v2) | |
Inherited from std::integral_constant
Member constants
value [static] |
true if B has a member ::value such that !bool(B::value) is true, false otherwise (public static member constant) |
Member functions
operator bool |
converts the object to bool, returns value (public member function) |
operator() (C++14) |
returns value (public member function) |
Member types
Type | Definition |
value_type
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bool |
type
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std::integral_constant<bool, value> |
[edit] Possible implementation
template<class B> struct negation : std::integral_constant<bool, !bool(B::value)> {}; |
[edit] Example
This section is incomplete Reason: no example |
[edit] See also
(C++17) |
logical NOT metafunction (class template) |