std::less_equal - cppreference.com (original) (raw)

| Defined in header | | | | -------------------------------------------------------------------------------------- | | ------------- | | template< class T > struct less_equal; | | (until C++14) | | template< class T = void > struct less_equal; | | (since C++14) |

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

Contents

• 1 Specializations
• 2 Member types
• 3 Member functions
• 4 std::less_equal::operator()
  • 4.1 Parameters
  • 4.2 Return value
  • 4.3 Exceptions
  • 4.4 Possible implementation
  • 4.5 Defect reports
  • 4.6 See also

[edit] Specializations

| | function object implementing x <= y deducing parameter and return types (class template specialization) [edit] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

[edit] Member types

[edit] Member functions

| | checks if the first argument is less than or equal to the second (public member function) | | ------------------------------------------------------------------------------------------------ |

std::less_equal::operator()

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

Checks if lhs is less than or equal to rhs.

Parameters

Return value

lhs <= rhs.

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

[edit] Exceptions

May throw implementation-defined exceptions.

Possible implementation

constexpr bool operator()(const T& lhs, const T& rhs) const { return lhs <= rhs; // assumes that the implementation handles pointer total order }

[edit] Defect reports

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

[edit] See also