3 ms·
I don't think you can use unions. In the draft of the ISO-IEC 9899 standard (C99) I have, paragraph 6.2.6.1.7 (I'm not kidding) says > When a value is stored i
by kmm 14y ago
I don't think you can use unions. In the draft of the ISO-IEC 9899 standard (C99) I have, paragraph 6.2.6.1.7 (I'm not kidding) says
> When a value is stored in a member of an object of union type, the bytes of the object
representation that do not correspond to that member but do correspond to other members
take unspecified values.
So no undefined behaviour (nasal demons and such) but still unspecified.
- raverbashing 14y agoI suppose this is saying something like this union X{ char a; float b; } If you store something in a, the other 3 bytes corresponding to b are unspecified But I suspect this doesn't apply if a and b have the same size.
- stephencanon 14y agoThis was corrected in C99.TC2 with the addition of footnote 82 (footnote 95 in C11).