std::equal_to<void>
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equal_to<>
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Defined in header
<functional>
template<>
class equal_to<void>;
(since C++14)
class equal_to<void>;
std::equal_to <void> is a specialization of std::equal_to with parameter and return type deduced.
Contents
[edit] Nested types
Nested type
Definition
is_transparent
unspecified
[edit] Member functions
operator()
(public member function)
std::equal_to<void>::operator()
template< class T, class U >
constexpr auto operator()( T&& lhs, U&& rhs ) const
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).
[edit] 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)); }