| (1) | (since C++11) | ||
| (2) | (since C++11) | ||
| (3) | (since C++11) | ||
| (4) | (since C++11) | ||
| (5) | (since C++11) | ||
| (6) | (since C++11) | ||
| (7) | (since C++11) | ||
| (8) | (since C++11) | ||
| (9) | (since C++11) | ||
| (10) | (since C++11) | ||
| (11) | (since C++11) | ||
| (12) | (since C++11) | ||
| (13) | (since C++11) | ||
| (14) | (since C++11) | ||
| (15) | (since C++11) | ||
| (16) | (since C++11) | ||
| (17) | (since C++11) | ||
| (18) | (since C++11) |
Compares the pointer values of two unique_ptrs, or a unique_ptr and nullptr.
1-6) Compares two
unique_ptrs 7-18) Compares a
unique_ptr and nullptr.Parameters
| x, y | - | unique_ptrs to compare |
Return value
1) x.get() == y.get().
2) x.get() != y.get().
3) std::less<CT>()(x.get(), y.get()), where CT is std::common_type<unique_ptr<T1, D1>::pointer, unique_ptr<T2, D2>::pointer>::type.
4) !(y < x).
5) y < x.
6) !(x < y).
7-8) !x.
9-10) (bool)x.
11) std::less<unique_ptr<T,D>::pointer>()(x.get(), nullptr).
12) std::less<unique_ptr<T,D>::pointer>()(nullptr, y.get()).
13) nullptr < x.
14) y < nullptr.
15) !(nullptr < x).
16) !(y < nullptr).
17) !(x < nullptr).
18) !(nullptr < y).
Example
1 2 3 4 5 6 7 8 9 10 11 12 13 | #include <iostream>#include <memory> int main() { std::unique_ptr<int> p1(new int(42)); std::unique_ptr<int> p2(new int(42)); std::cout << "p1 == p1: " << (p1 == p1) << '\n'; // p1 and p2 point to different memory locations, so p1 != p2 std::cout << "p1 == p2: " << (p1 == p2) << '\n';} |
Output:
1 2 | p1 == p1: 1p1 == p2: 0 |
See also
| returns a pointer to the managed object (public member function) |
Please login to continue.