std::equal_to, not_equal_to, less, greater, less_equal, greater_equal(std::experimental::propagate_const)
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< cpp | experimental | propagate const
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std::experimental::propagate_const
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std::equal_tostd::not_equal_tostd::lessstd::greaterstd::less_equalstd::greater_equal
Defined in header
<experimental/propagate_const>
template< class T > struct equal_to<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
template< class T > struct not_equal_to<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
template< class T > struct less<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
template< class T > struct greater<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
template< class T > struct less_equal<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
template< class T > struct greater_equal<std::experimental::propagate_const <T>>;
(library fundamentals TS v2)
The standard comparison function objects are partially specialized for std::experimental::propagate_const <T>.
Let p.t_ denote the pointer-like object wrapped by a std::experimental::propagate_const <T> p, then given objects p and q of type std::experimental::propagate_const <T>, the following shall hold:
- std::equal_to <std::experimental::propagate_const <T>>()(p, q) == std::equal_to <T>()(p.t_, q.t_)
- std::not_equal_to <std::experimental::propagate_const <T>>()(p, q) == std::not_equal_to <T>()(p.t_, q.t_)
- std::less <std::experimental::propagate_const <T>>()(p, q) == std::less <T>()(p.t_, q.t_)
- std::greater <std::experimental::propagate_const <T>>()(p, q) == std::greater <T>()(p.t_, q.t_)
- std::less_equal <std::experimental::propagate_const <T>>()(p, q) == std::less_equal <T>()(p.t_, q.t_)
- std::greater_equal <std::experimental::propagate_const <T>>()(p, q) == std::greater_equal <T>()(p.t_, q.t_)
[edit] Notes
These specializations ensure that when T is a pointer type, specializations of these class templates for std::experimental::propagate_const <T> yield a total order, even if the corresponding built-in operators do not.
[edit] Example
This section is incomplete
Reason: no example
Reason: no example