std::equal_to<void>

Since C++14

Header: <functional>

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

# Declarations

template<>
class equal_to<void>;

(since C++14)

# Parameters

lhs, rhs: values to compare

# Return value

std::forward(lhs) == std::forward(rhs).

# Example

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