greater_equal

Function Object

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Binary function object that returns true if its first argument is greater than or equal to its second

None

#include <functional>

template <class T>
struct greater_equal ; : binary_function<T, T, bool> {
  typedef typename binary_function<T, T, bool>::second_argument_type 
                                                second_argument_type;
  typedef typename binary_function<T, T, bool>::first_argument_type     
                                                first_argument_type;
  typedef typename binary_function<T, T, bool>::result_type 
                                                result_type;
  bool operator() (const T&, const T&) const;
};

greater_equal is a binary function object. Its operator() returns true if x is greater than or equal to y. You can pass a greater_equal object to any algorithm that requires a binary function. For example, the sort algorithm can accept a binary function as an alternate comparison object to sort a sequence. greater_equal would be used in that algorithm in the following manner:

vector<int> vec1;
.
.
sort(vec1.begin(), vec1.end(),greater_equal<int>());

After this call to sort, vec1 will be sorted in descending order.

If your compiler does not support default template parameters, then you need to always supply the Allocator template argument. For instance, you'll have to write :

vector<int, allocator<int> >

instead of

vector<int>

Function Objects

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