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

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

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.

greater_equal<void>

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

(since C++14)

Member types

type	definition
`result_type`	`bool`
`first_argument_type`	`T`
`second_argument_type`	`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;
}

Links:

http://en.cppreference.com/w/cpp/utility/functional/greater_equal

doc_CPP

2016-10-11 10:03:13

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