std::shared_ptr::operator==, !=, <, <=, >, >=
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< cpp | memory | shared ptr
template <class T, class U>
bool operator==(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(1) | |
template <class T, class U>
bool operator!=(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(2) | |
template <class T, class U>
bool operator<(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(3) | |
template <class T, class U>
bool operator>(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(4) | |
template <class T, class U>
bool operator<=(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(5) | |
template <class T, class U>
bool operator>=(const shared_ptr<T>& lhs, const shared_ptr<U>& rhs); |
(6) | |
template <class T>
bool operator==(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(7) | |
template <class T>
bool operator==(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(8) | |
template <class T>
bool operator!=(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(9) | |
template <class T>
bool operator!=(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(10) | |
template <class T>
bool operator<(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(11) | |
template <class T>
bool operator<(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(12) | |
template <class T>
bool operator<=(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(13) | |
template <class T>
bool operator<=(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(14) | |
template <class T>
bool operator>(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(15) | |
template <class T>
bool operator>(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(16) | |
template <class T>
bool operator>=(const shared_ptr<T>& lhs, std::nullptr_t rhs); |
(17) | |
template <class T>
bool operator>=(std::nullptr_t lhs, const shared_ptr<T>& rhs); |
(18) | |
Compares two shared_ptr<T>
objects or compares shared_ptr<T>
with a null pointer.
Note that the comparison operators for shared_ptr
simply compare pointer values; the actual objects pointed to are not compared. Having operator<
defined for shared_ptr
allows shared_ptr
s to be used as keys in associative containers, like std::map and std::set.
Contents |
[edit] Parameters
lhs | - | the left-hand shared_ptr to compare
|
rhs | - | the right-hand shared_ptr to compare
|
[edit] Return value
1) lhs.get() == rhs.get()
2) !(lhs == rhs)
3) std::less<V>()(lhs.get(), rhs.get()), where V is the composite pointer typeThis section is incomplete Reason: needs definition from §5.9/2) |
4) rhs < lhs
5) !(rhs < lhs)
6) !(lhs < rhs)
7) !lhs
8) !rhs
9) (bool)lhs
10) (bool)rhs
11) std::less<T*>()(lhs.get(), nullptr)
12) std::less<T*>()(nullptr, rhs.get())
13) nullptr < lhs
14) rhs < nullptr
15) !(nullptr < lhs)
16) !(rhs < nullptr)
17) !(lhs < nullptr)
18) !(nullptr < rhs)
[edit] Exceptions
[edit] Example
This section is incomplete Reason: no example |
[edit] See also
returns a pointer to the managed object (public member function) |