std::experimental::negation - cppreference.com
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Merged into ISO C++ The functionality described on this page was merged into the mainline ISO C++ standard as of 2/2016, see std::negation (since C++17) |
Forms the logical negation of the type trait B.
The type negation<B> is a UnaryTypeTrait with a base characteristic 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
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Helper variable template
template< class B > constexpr bool negation_v = negation<B>::value; |
(library fundamentals TS v2) | |
Inherited from std::integral_constant
Member constants
true if B has a member ::value such that !bool(B::value) is true, false otherwise (public static member constant) |
Member functions
converts the object to bool, returns value (public member function) | |
returns value (public member function) |
Member types
| Type | Definition |
value_type
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bool
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type
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std::integral_constant<bool, value>
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Possible implementation
template<class B> struct negation : std::integral_constant<bool, !bool(B::value)> {};