Double Frees in Modern C++

Modern C++은 이 문제를 다르게 해결합니다:

Modern C++ solves this differently:

std::string s1 = "Cpp";
std::string s2 = s1;  // Duplicate the data in s1.
  • s1의 힙 데이터는 복제되고, s2는 독립적인 복사본을 얻습니다.
  • s1 와 s2의 스코프가 종료되면 각각의 메모리가 해제됩니다.
  • The heap data from s1 is duplicated and s2 gets its own independent copy.
  • When s1 and s2 go out of scope, they each free their own memory.

Before copy-assignment:

StackHeaps1ptrCpplen3capacity3

After copy-assignment:

StackHeaps1ptrCpplen3capacity3s2ptrCpplen3capacity3