On 6/1/2012 2:17 PM, Osmo Antero wrote: > I have couple of C structures that I want to distinguish between by > reading the structures' first (type) field. [...] > > Q: Can I assume that the "type" field is always first in the > structures, so I can read it with: NodeType type = *(NodeType*)node;
Yes. Structure members are stored in the order in which they're defined, and a pointer to a structure also points to its first member (suitably cast). This is guaranteed by the C standards. > but can I trust it on all *nix plattforms and GCC compilers. Anything that's standards-compliant. - Ernie http://home.comcast.net/~erniew _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
