< cpp‎ | experimental‎ | ranges
Technical Specification
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
Experimental Non-TS
Pattern Matching
Linear Algebra
2D Graphics
General utilities library
Utility components
Function objects
Metaprogramming and type traits
Tagged pairs and tuples
tag specifiers
template< class T = void >

    requires StrictTotallyOrdered<T> ||
             Same<T, void> ||
             /* < on two const T lvalues invokes a built-in operator comparing pointers */

struct greater;
(ranges TS)
struct greater<void>;
(ranges TS)

Function object for performing comparisons. The primary template invokes operator< on const lvalues of type T with the argument order inverted. The specialization greater<void> deduces the parameter types of the function call operator from the arguments (but not the return type).

All specializations of greater are Semiregular.


[edit] Member types

Member type Definition
is_transparent (member only of greater<void> specialization) /* unspecified */

[edit] Member functions

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


constexpr bool operator()(const T& x, const T& y) const;
(1) (member only of primary greater<T> template)
template< class T, class U >

    requires StrictTotallyOrderedWith<T, U> ||
             /* std::declval<T>() < std::declval<U>() resolves to
                a built-in operator comparing pointers */

constexpr bool operator()(T&& t, U&& u) const;
(2) (member only of greater<void> specialization)
1) Compares x and y. Equivalent to return ranges::less<>{}(y, x);.
2) Compares t and u. Equivalent to return ranges::less<>{}(std::forward<U>(u), std::forward<T>(t));.

[edit] Notes

Unlike std::greater, ranges::greater requires all six comparison operators <, <=, >, >=, == and != to be valid (via the StrictTotallyOrdered and StrictTotallyOrderedWith constraints) and is entirely defined in terms of ranges::less. However, the implementation is free to use operator> directly, because those concepts require the results of the comparison operators to be consistent.

[edit] Example

[edit] See also

function object implementing x > y
(class template) [edit]