cast_byte
fs->f->maxstacksize = cast_byte(newstack);
L->hookmask = cast_byte(mask);
L->status = cast_byte(errcode); /* mark it as dead */
L->status = cast_byte(status); /* mark thread as `dead' */
c->c.nupvalues = cast_byte(n);
c->l.nupvalues = cast_byte(n);
g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */
(gch(x)->marked = cast_byte((gch(x)->marked & maskcolors) | luaC_white(g)))
gch(curr)->marked = cast_byte((marked & toclear) | toset);
ts->tsv.extra = cast_byte(i+1); /* reserved word */
fs->nactvar = cast_byte(fs->nactvar + nvars);
f->upvalues[fs->nups].idx = cast_byte(v->u.info);
f->numparams = cast_byte(fs->nactvar);
h = h ^ ((h<<5) + (h>>2) + cast_byte(str[l1 - 1]));
t->lsizenode = cast_byte(lsize);
t->flags = cast_byte(~0);
events->flags |= cast_byte(1u<<event); /* cache this fact */
*h++=cast_byte(VERSION);
*h++=cast_byte(FORMAT);
*h++=cast_byte(*(char*)&x); /* endianness */
*h++=cast_byte(sizeof(int));
*h++=cast_byte(sizeof(size_t));
*h++=cast_byte(sizeof(Instruction));
*h++=cast_byte(sizeof(lua_Number));
*h++=cast_byte(((lua_Number)0.5)==0); /* is lua_Number integral? */