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by int_19h
2674 days ago
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You need to look at the text of the Standard itself when it comes to this level of language lawyering. The short answer is that operator[] has undefined behavior if the index is out of range. Performing a check and terminating the program with some kind of runtime error is a legal subset of "undefined behavior", and so it's commonly done in debug builds, but you cannot rely on it in any sense. |
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