3 ms·

I'm mildly surprised that wouldn't invoke undefined behavior if there was padding between the fields of the struct due to writing over only part of the second f

I'm mildly surprised that wouldn't invoke undefined behavior if there was padding between the fields of the struct due to writing over only part of the second field, but then again I'm not as intimately familiar with the C standard as I should be.

cygx 7y ago
Bytewise access is always possible and won't violate the strict aliasing/effective typing rules. The worst that could happen when messing with IEEE floating point values that way is creating a signalling NaN (if they are available).
- aw1621107 7y ago
  TIL. Thanks!