Defined in header <functional> | ||
---|---|---|
template< class T > struct not_equal_to; | (until C++14) | |
template< class T = void > struct not_equal_to; | (since C++14) |
Function object for performing comparisons. Unless specialised, invokes operator!=
on type T
.
Specializations
The standard library provides a specialization of
| (since C++14) |
Member types
type | definition |
---|---|
result_type | bool |
first_argument_type | T |
second_argument_type | T |
Member functions
operator() | checks if the arguments are not equal (public member function) |
std::not_equal_to::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) |
Checks whether lhs
is not equal to rhs
.
Parameters
lhs, rhs | - | values to compare |
Return value
true
if lhs != rhs
, false
otherwise.
Exceptions
(none).
Possible implementation
constexpr bool operator()(const T &lhs, const T &rhs) const { return lhs != rhs; } |
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