SGchar SGwchar SGdchar

SGchar SGwchar SGdchar character types

typedef char SGchar; typedef ... SGwchar; typedef ... SGdchar;

SGchar is defined to the `char` type for conveniency and completeness. SGwchar and SGdchar are defined to unsigned 16-bit and 32-bit types, respectively; they are meant to be used for UTF-16 and UTF-32.

SGbool SGenum SGuint SGfloat

Check for C11 and use `char16_t` / `char32_t` for SGwchar / SGdchar if possible.
(?) Make SGchar unsigned