"C + +" C + + reference return value to be cautious

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The reference is not as complex as a pointer, and does not copy space, and always prefers it.

       then delve deeper into C + + reference issues        don't know how the use of reference return values is a big risk        Foundation:               when an object is passed as a value. The copy constructor of the class is called, Common, function parameters. = number assignment.        I carried out the following experiment:             has a function defined as follows:                        A & func ();             returns a reference to a class           the original, which I have called. A = func (); I believe that's what most people call          after an experiment, the copy constructor is called once          actually returns a reference to the stack, and then the variable a duplicates the object inside the stack        so, when the reference function is called later, To call A & a = func ();       if you want to write a class package to someone else, try to avoid referencing the return, because the wrong call will lead to the heap memoryData is not released.

"C + +" C + + reference return value should be cautious