Function luaK_exp2RK

Source/Misc/lua/src/lua.c:4113–4138

int luaK_exp2RK (FuncState *fs, expdesc *e) {
luaK_exp2val(fs, e);
switch (e->k) {
case VKNUM:
case VTRUE:
case VFALSE:
case VNIL: {
if (fs->nk <= MAXINDEXRK) {  /* constant fit in RK operand? */
e->u.s.info = (e->k == VNIL)  ? nilK(fs) :
(e->k == VKNUM) ? luaK_numberK(fs, e->u.nval) :
boolK(fs, (e->k == VTRUE));
e->k = VK;
return RKASK(e->u.s.info);
}
else break;
}
case VK: {
if (e->u.s.info <= MAXINDEXRK)  /* constant fit in argC? */
return RKASK(e->u.s.info);
else break;
}
default: break;
}
/* not a constant in the right range: put it in a register */
return luaK_exp2anyreg(fs, e);
}


void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {