下面的代码向函数传递modify_entry一个指向类型对象的指针,Entry并在函数体内部unique_ptr采用原始指针.但是,指针指向的对象似乎在函数返回后仍然存在.
当我编译这段代码
#include <iostream>
#include <memory>
struct Entry {
Entry(std::string name) : name_(name) { std::cout << "Constructor for " + name_ + '\n'; }
~Entry() { std::cout << "Destructor for " + name_ + '\n'; }
std::string name_;
};
void modify_entry(Entry* e_ptr){
std::cout << "Inside modify_entry()\n";
std::unique_ptr<Entry>{e_ptr}->name_ += " Doe";
}
int main(int argc, const char * argv[])
{
Entry* entry_ptr = new Entry("John");
modify_entry(entry_ptr);
std::cout << "Back from modify_entry()\n";
std::cout << entry_ptr->name_ << …