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String :: insert at the end of the string

The following two lines do the same in Visual Studio 2005:

myString.insert(myString.size(),1,myNewChar);

and

myString.append(1,myNewChar);

Is the first one to throw an out_of_range exception or is this the correct behavior?

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1 answer

This is the correct behavior - the index you pass is the position index behind the insertion point of the new characters, not earlier. In fact, the C ++ 03 standard specifically says (§21.3.5.4 / 2):

Required pos1 <= size()andpos2 <= str.size()

(where pos1is the index that you pass, and pos2 == nposin the overload that you call) - note that this is <=, not <.

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