std::experimental::ranges::less_equal(3)

NAME
std::experimental::ranges::less_equal - std::experimental::ranges::less_equal

Synopsis
   Defined in header <experimental/ranges/functional>
   template< class T = void >
   requires StrictTotallyOrdered<T> ||
   Same<T, void> || (ranges TS)
   /* < on two const T lvalues invokes a built-in operator comparing
   pointers */
   struct less_equal;
   template <> (ranges TS)
   struct less_equal<void>;
   Function object for performing comparisons. The primary template invokes operator<
   on const lvalues of type T with the argument order inverted and then negates the
   result. The specialization less_equal<void> deduces the parameter types of the
   function call operator from the arguments (but not the return type).
   All specializations of less_equal are Semiregular.

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

Member functions
   operator() checks if the first argument is less than or equal to the second
              (public member function) std::experimental::ranges::less_equal::operator()
   constexpr bool operator()(const T& x, const T& (1) (member only of primary
   y) const; less_equal<T> template)
   template< class T, class U >
   requires StrictTotallyOrderedWith<T, U> ||
   /* std::declval<T>() < std::declval<U>() (2) (member only of less_equal<void>
   resolves to specialization)
   a built-in operator comparing pointers */
   constexpr bool operator()(T&& t, U&& u) const;
   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));.

Notes
   Unlike std::less_equal, ranges::less_equal 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.

Example
    This section is incomplete
    Reason: no example

See also
   less_equal function object implementing x <= y
              (class template)