std::greater

 

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Operator wrappers plus minus negate multiplies divides modulus bit_and bit_or bit_not (C++14)   bit_xor equal_to not_equal_to greater less greater_equal less_equal logical_and logical_or logical_not	Transparent operator wrappers plus<> (C++14) minus<> (C++14) negate<> (C++14) multiplies<> (C++14)   divides<> (C++14) modulus<> (C++14) bit_and<> (C++14) bit_or<> (C++14) bit_not<> (C++14) bit_xor<> (C++14) equal_to<> (C++14) not_equal_to<> (C++14) greater<> (C++14) less<> (C++14) greater_equal<> (C++14) less_equal<> (C++14) logical_and<> (C++14) logical_or<> (C++14) logical_not<> (C++14)
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unary_function (until C++17*) binary_function (until C++17*) ptr_fun (until C++17*) pointer_to_unary_function (until C++17*) pointer_to_binary_function (until C++17*)   mem_fun (until C++17*) mem_fun_tmem_fun1_tconst_mem_fun_tconst_mem_fun1_t (until C++17*)(until C++17*)(until C++17*)(until C++17*) not1 (until C++20*) not2 (until C++20*)	binder1stbinder2nd (until C++17*)(until C++17*) bind1stbind2nd (until C++17*)(until C++17*) mem_fun_ref (until C++17*) mem_fun_ref_tmem_fun1_ref_tconst_mem_fun_ref_tconst_mem_fun1_ref_t (until C++17*)(until C++17*)(until C++17*)(until C++17*) unary_negate (until C++20*) binary_negate (until C++20*)

 

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

Function object for performing comparisons. The main template invokes operator> on type T.

Specializations

greater<void> (C++14)

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

Member types

Type	Definition
result_type(deprecated in C++17)(removed in C++20)	bool
first_argument_type(deprecated in C++17)(removed in C++20)	T
second_argument_type(deprecated in C++17)(removed in C++20)	T

These member types are obtained via publicly inheriting std::binary_function<T, T, bool>.

(until C++11)

Member functions

operator()

checks whether the first argument is greater than the second (public member function)

std::greater::operator()

bool operator()(const T& lhs, const T& rhs )const;		(constexpr since C++14)

Checks whether lhs is greater than rhs.

Parameters

lhs, rhs

-

values to compare

Return value

lhs > rhs.

If T is a pointer type, the result is consistent with the implementation-defined strict total order over pointers.

Exceptions

May throw implementation-defined exceptions.

Possible implementation

constexprbool operator()(const T& lhs, const T& rhs)const{return lhs > rhs;// assumes that the implementation handles pointer total order}

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2562	C++98	the pointer total order might be inconsistent	guaranteed to be consistent

See also

less	function object implementing x < y (class template)
ranges::greater (C++20)	constrained function object implementing x > y (class)