制作仅移动类型的地图向量似乎在 Windows 上无法正常工作。请参阅此处的代码: https: //godbolt.org/z/yAHmzh
#include <vector>
#include <map>
#include <memory>
// vector<vector<move-only>> works
void foo() {
std::vector<std::vector<std::unique_ptr<int>>> outer;
std::vector<std::unique_ptr<int>> inner;
std::unique_ptr<int> p = std::make_unique<int>(1);
inner.push_back(std::move(p));
outer.push_back(std::move(inner));
}
// vector<map<move-only>> fails to compile upon inserting an element.
void bar() {
std::vector<std::map<std::unique_ptr<int>, std::unique_ptr<int>>> vec;
std::map<std::unique_ptr<int>, std::unique_ptr<int>> map;
std::unique_ptr<int> p1 = std::make_unique<int>(1);
std::unique_ptr<int> p2 = std::make_unique<int>(2);
map.insert(std::make_pair(std::move(p1), std::move(p2)));
// The following line fails to compile on windows. It errors with a message about
// the unique_ptr copy constructor being explicitly deleted. This …Run Code Online (Sandbox Code Playgroud)