Method Next

table.go:351–387

This function is equivalent to lua_next ( http://www.lua.org/manual/5.1/manual.html#lua_next ).

(key LValue)

// This function is equivalent to lua_next ( http://www.lua.org/manual/5.1/manual.html#lua_next ).
func (tb *LTable) Next(key LValue) (LValue, LValue) {
	init := false
	if key == LNil {
		key = LNumber(0)
		init = true
	}

	if init || key != LNumber(0) {
		if kv, ok := key.(LNumber); ok && isInteger(kv) && int(kv) >= 0 && kv < LNumber(MaxArrayIndex) {
			index := int(kv)
			if tb.array != nil {
				for ; index < len(tb.array); index++ {
					if v := tb.array[index]; v != LNil {
						return LNumber(index + 1), v
					}
				}
			}
			if tb.array == nil || index == len(tb.array) {
				if (tb.dict == nil || len(tb.dict) == 0) && (tb.strdict == nil || len(tb.strdict) == 0) {
					return LNil, LNil
				}
				key = tb.keys[0]
				if v := tb.RawGetH(key); v != LNil {
					return key, v
				}
			}
		}
	}

	for i := tb.k2i[key] + 1; i < len(tb.keys); i++ {
		key := tb.keys[i]
		if v := tb.RawGetH(key); v != LNil {
			return key, v
		}
	}
	return LNil, LNil
}