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std::logical_not<void>

Defined in header <functional> 
template<>
class logical_not<void>;
 (since C++14)

std::logical_not<void> is a specialization of std::logical_not with parameter and return type deduced.

Nested types

Nested type Definition
is_transparent unspecified

Member functions

operator()
applies operator! to its argument
(public member function)

std::logical_not<void>::operator()

template< class T >
constexpr auto operator()( T&& arg ) const
    -> decltype(!std::forward<T>(arg));

Returns the result of !std::forward<T>(arg).

Parameters

arg - value to apply logical NOT to

Return value

!std::forward<T>(arg).

Example

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https://en.cppreference.com/w/cpp/utility/functional/logical_not_void