Function lua_settop

Source/Misc/lua/src/lua.c:2013–2026

LUA_API void lua_settop (lua_State *L, int idx) {
lua_lock(L);
if (idx >= 0) {
api_check(L, idx <= L->stack_last - L->base);
while (L->top < L->base + idx)
setnilvalue(L->top++);
L->top = L->base + idx;
}
else {
api_check(L, -(idx+1) <= (L->top - L->base));
L->top += idx+1;  /* `subtract' index (index is negative) */
}
lua_unlock(L);
}


LUA_API void lua_remove (lua_State *L, int idx) {