std::equal_to
< cpp | utility | functional
Defined in header <functional>
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template< class T > struct equal_to; |
(until C++14) | |
template< class T = void > struct 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
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(since C++14) |
Member types
|
(until C++20) |
Member functions
operator() |
checks if the arguments are equal (public member function) |
std::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 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; } |