Is it safe to call temporary object's methods?

Question

I have a function which shall return a char*. Since I have to concatenate some strings, I wrote the following line:

std::string other_text;
// ...
func((\"te         


        

Answer 1

It is safe to call methods of temporary variables, but not safe to return a char* of a temporary variable for later use.

This char* points to a buffer that will be freed soon. Once it is freed you will have a pointer to an invalid region in memory.

Instead please return an std::string object.