operators (std::unique_ptr)
template<class T1, class D1, class T2, class D2> bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (1) | (since C++11) |
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template<class T1, class D1, class T2, class D2> bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (2) | (since C++11) |
template<class T1, class D1, class T2, class D2> bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (3) | (since C++11) |
template<class T1, class D1, class T2, class D2> bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (4) | (since C++11) |
template<class T1, class D1, class T2, class D2> bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (5) | (since C++11) |
template<class T1, class D1, class T2, class D2> bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); | (6) | (since C++11) |
template <class T, class D> bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; | (7) | (since C++11) |
template <class T, class D> bool operator==(nullptr_t, const unique_ptr<T, D>& x) noexcept; | (8) | (since C++11) |
template <class T, class D> bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; | (9) | (since C++11) |
template <class T, class D> bool operator!=(nullptr_t, const unique_ptr<T, D>& x) noexcept; | (10) | (since C++11) |
template <class T, class D> bool operator<(const unique_ptr<T, D>& x, nullptr_t); | (11) | (since C++11) |
template <class T, class D> bool operator<(nullptr_t, const unique_ptr<T, D>& y); | (12) | (since C++11) |
template <class T, class D> bool operator<=(const unique_ptr<T, D>& x, nullptr_t); | (13) | (since C++11) |
template <class T, class D> bool operator<=(nullptr_t, const unique_ptr<T, D>& y); | (14) | (since C++11) |
template <class T, class D> bool operator>(const unique_ptr<T, D>& x, nullptr_t); | (15) | (since C++11) |
template <class T, class D> bool operator>(nullptr_t, const unique_ptr<T, D>& y); | (16) | (since C++11) |
template <class T, class D> bool operator>=(const unique_ptr<T, D>& x, nullptr_t); | (17) | (since C++11) |
template <class T, class D> bool operator>=(nullptr_t, const unique_ptr<T, D>& y); | (18) | (since C++11) |
比较两个指针的值。unique_ptrs，或aunique_ptr和nullptr...
1-6%29比较两unique_ptr斯
7-18%29比较aunique_ptr和nullptr...
参数
x, y | - | unique_ptrs to compare |
|---|
返回值
1%29x.get() == y.get()...
2%29x.get() != y.get()...
3%29std::less<CT>()(x.get(), y.get())，在哪里CT是std::common_type<unique_ptr<T1, D1>::pointer, unique_ptr<T2, D2>::pointer>::type...
4%29!(y < x)...
5%29y < x...
6%29!(x < y)...
7-8%29!x...
9-10%29(bool)x...
11%29std::less<unique_ptr<T,D>::pointer>()(x.get(), nullptr)...
12%29std::less<unique_ptr<T,D>::pointer>()(nullptr, y.get())...
13%29nullptr < x...
14%29y < nullptr...
15%29!(nullptr < x)...
16%29!(y < nullptr)...
17%29!(x < nullptr)...
18%29!(nullptr < y)...
例
二次
#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';
}二次
产出：
二次
p1 == p1: 1
p1 == p2: 0二次
另见
get | returns a pointer to the managed object (public member function) |
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