bearophile Wrote: > - C Standard says that assigning to one member of a union and then accessing > a different member is undefined behaviour. > - GCC is a practical compiler, so it has the -fno-strict-aliasing switch, > that allows to use that trick. See "-Wstrict-aliasing" and: > http://stackoverflow.com/questions/2906365/gcc-strict-aliasing-and-casting-through-a-union > - Walter said that regarding such union semantics D acts as C. So that union > trick will break with other future D compilers.
I believe that defined behavior within an area where C is specified to be undefined is completely in line with operating as C does. But where does Walter say Unions act as C in this case? Why not, define the behavior and leave it.
