Where is a std::string allocated in memory?

Question

Here is a function:

void foo() {
   string str = \"StackOverflo\";
   str.push_back(\'w\');
}

When we declare the string inside the function, i

Answer 1

"StackOverflo", the string literal, is likely stored in the read-only data space of the binary and is mapped into memory when the program starts. You can read more about this here.

str, the class instance`, is allocated on the stack. But the memory its constructor allocates to make a copy of the string literal is allocated on the heap.

The foo function returns a copy of str, so what you have coded is ok.