std::logical_and
template< class T >
struct logical_and;
| | (until C++14) |
template< class T = void >
struct logical_and;
| | (since C++14) |
Function object for performing logical AND (logical conjunction). Effectively calls operator&& on type T.
Specializations
| The standard library provides a specialization of std::logical_and when T is not specified, which leaves the parameter types and return type to be deduced.
| | function object implementing x && y deducing argument and return types
(class template specialization) |
| (since C++14) |
Member types | Type | Definition |
result_type(deprecated in C++17) | bool |
first_argument_type(deprecated in C++17) | T |
second_argument_type(deprecated in C++17) | T |
| (until C++20) |
Member functions
| operator() | returns the logical AND of the two arguments
(public member function) |
std::logical_and::operator()
bool operator()( const T& lhs, const T& rhs ) const;
| | (until C++14) |
constexpr bool operator()( const T& lhs, const T& rhs ) const;
| | (since C++14) |
Returns the logical AND of lhs and rhs.
Parameters
| lhs, rhs | - | values to compute logical AND of |
Return value
The result of lhs && rhs.
Exceptions
(none).
Possible implementation
constexpr bool operator()(const T &lhs, const T &rhs) const
{
return lhs && rhs;
} |