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by IncRnd
1326 days ago
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There are still edge cases here - various posters here have mentioned them. The proper method is to type promote first - not just to unsigned but to a wider variable type - 32 to 64 bits or from 64 to 128 bits. Unsigned simply gives a single extra bit, while erasing negative semantics. Promoting to twice the size works for either addition or multiplication. The benefits are correctness and the ability to be understood at a glance. |
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Are you sure? What's an example of an array.length that would trigger a remaining edge case here? (Keep in mind array.length is 32-bit in Java.)