NAME¶

std::equal_to - std::equal_to

Synopsis¶

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

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

Member functions¶

operator() tests if the two arguments compare equal
(public member function)

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

template< class T, class U >

constexpr auto operator()( T&& lhs, U&& rhs ) const

-> decltype(std::forward<T>(lhs) == std::forward<U>(rhs));

Returns the result of equality comparison between lhs and rhs.

Parameters¶

lhs, rhs - values to compare

Return value¶

std::forward<T>(lhs) == std::forward<U>(rhs).

Example¶

// Run this code

#include <functional>

int main()
{
constexpr int a = 0, b = 8;
std::equal_to<> equal{};
static_assert(equal(a, a));
static_assert(!equal(a, b));
}