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std::logical_not

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Defined in header <functional>
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template< class T >
struct logical_not;
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Function object for performing logical NOT (logical negation). Effectively calls operator! for type T.

Contents

Member types

Type Definition
result_type bool
argument_type T

Member functions

operator()
returns the logical NOT of the argument
(public member function)

std::logical_not::operator()

bool operator()( const T& arg ) const;

Returns the logical NOT of arg.

Parameters

arg - value to compute logical NOT of

Return value

The result of !arg.

Exceptions

(none)

Possible implementation

bool operator()(const T &arg) const 
{
    return !arg;
}