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by adwn 1514 days ago
You think negative numbers in a signed type are a 1-in-a-1000 case, really?

Silently casting signed integers to unsigned is a terrible idea, and a recipe for bugs. And completely unnecessary to boot, because you could promote Int8 to Int16, and (Int16, UInt16) to (Int32, Int32).
1 comments
astrange 1514 days ago
Related, an integer bug that can't be fixed in C is that "unsigned short" promotes to "int" instead of "unsigned int", so this doesn't produce the result you want.

  unsigned x = (unsigned short)65535 * (unsigned short)65535;
(It overflows even though it's less than UINT_MAX, and worse it's UB.)
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