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std::greater_equal

Defined in header <functional> 
template< class T >
struct greater_equal;
 (until C++14) 
template< class T = void >
struct greater_equal;
 (since C++14)

Function object for performing comparisons. Unless specialized, invokes operator>= on type T.

Specializations

A specialization of std::greater_equal for any pointer type yields a total order, even if the built-in operator<= does not.

If the function call operator of the specialization std::greater_equal<void> calls a built-in operator comparing pointers, it yields a total order, even if the built-in operator<= does not. (since C++14).

The standard library provides a specialization of std::greater_equal when T is not specified, which leaves the parameter types and return type to be deduced.

 function object implementing x >= y deducing argument and return types
(class template specialization)
(since C++14)

Member types

type definition
result_type(deprecated in C++17) bool
first_argument_type(deprecated in C++17) T
second_argument_type(deprecated in C++17) T

Member functions

operator()
 checks if the first argument is greater than or equal to the second
(public member function)

std::greater_equal::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 greater than or 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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http://en.cppreference.com/w/cpp/utility/functional/greater_equal