std::experimental::negation
From cppreference.com
< cpp | experimental
| Defined in header
<experimental/type_traits>
|
||
| template<class B>
struct negation; |
(1) | (library fundamentals TS v2) |
Forms the logical negation of the type trait B.
The type negation<B> is a UnaryTypeTrait with a BaseCharacteristic of std::integral_constant<bool, !B::value>.
Contents |
[edit] Template parameters
| B | - | any type such that the expression !B::value is a valid converted constant expression of type bool |
[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 !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
|
bool
|
type
|
std::integral_constant<bool, value> |
[edit] Possible implementation
template<class B> struct negation : std::integral_constant<bool, !B::value> { }; |
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C++17)
|
logical NOT metafunction (class template) |