std::ranges::not_equal_to - cppreference.com (original) (raw)

| | | | | ---------------------- | | ------------- | | struct not_equal_to; | | (since C++20) |

Function object for performing comparisons. Deduces the parameter types of the function call operator from the arguments (but not the return type).

Contents

• 1 Nested types
• 2 Member functions
• 3 std::ranges::not_equal_to::operator()
  • 3.1 Notes
  • 3.2 Example
  • 3.3 Defect reports
  • 3.4 See also

[edit] Nested types

[edit] Member functions

| | checks if the arguments are not equal (public member function) | | ------------------------------------------------------------------- |

[edit] Notes

Unlike std::not_equal_to, std::ranges::not_equal_to requires both == and != to be valid (via the equality_comparable_with constraint), and is entirely defined in terms of std::ranges::equal_to.

[edit] Example

[edit] Defect reports

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

[edit] See also