operator==,!=,<,<=,>,>=(std::experimental::observer_ptr) (3) - Linux Manuals

operator==,!=,<,<=,>,>=(std::experimental::observer_ptr): operator==,!=,<,<=,>,>=(std::experimental::observer_ptr)

NAME

operator==,!=,<,<=,>,>=(std::experimental::observer_ptr) - operator==,!=,<,<=,>,>=(std::experimental::observer_ptr)

Synopsis

template<class W1, class W2> (1) (library fundamentals TS v2)
bool operator==(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);
template<class W1, class W2> (2) (library fundamentals TS v2)
bool operator!=(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);
template<class W> (3) (library fundamentals TS v2)
bool operator==(const observer_ptr<W>& p, std::nullptr_t) noexcept;
template<class W> (4) (library fundamentals TS v2)
bool operator==(std::nullptr_t, const observer_ptr<W>& p) noexcept;
template<class W> (5) (library fundamentals TS v2)
bool operator!=(const observer_ptr<W>& p, std::nullptr_t) noexcept;
template<class W> (6) (library fundamentals TS v2)
bool operator!=(std::nullptr_t, const observer_ptr<W>& p) noexcept;
template<class W1, class W2> (7) (library fundamentals TS v2)
bool operator<(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);
template<class W1, class W2> (8) (library fundamentals TS v2)
bool operator>(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);
template<class W1, class W2> (9) (library fundamentals TS v2)
bool operator<=(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);
template<class W1, class W2> (10) (library fundamentals TS v2)
bool operator>=(const observer_ptr<W1>& p1, const observer_ptr<W2>& p2);

Compares the pointer values of two observer_ptrs, or a observer_ptr and nullptr.
1-2) Equality comparison for two observer_ptrs
3-6) Equality comparison for an observer_ptr and nullptr.
7-10) Ordered comparison for two observer_ptrs

Parameters

p, p1, p2 - observer_ptrs to compare

Return value

1) p1.get() == p2.get()
2) !(p1 == p2)
3-4) !p
5-6) (bool)p
7) std::less<W3>()(p1.get(), p2.get()), where W3 is the composite pointer type of W1* and W2*
8) p2 < p1
9) !(p2 < p1)
10) !(p1 < p2)