func marshalInt()

in marshal.go [550:620]
68 lines of code
29 McCabe index (conditional complexity)

func marshalInt(info TypeInfo, value interface{}) ([]byte, error) {
	switch v := value.(type) {
	case Marshaler:
		return v.MarshalCQL(info)
	case unsetColumn:
		return nil, nil
	case int:
		if v > math.MaxInt32 || v < math.MinInt32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case uint:
		if v > math.MaxUint32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case int64:
		if v > math.MaxInt32 || v < math.MinInt32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case uint64:
		if v > math.MaxUint32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case int32:
		return encInt(v), nil
	case uint32:
		return encInt(int32(v)), nil
	case int16:
		return encInt(int32(v)), nil
	case uint16:
		return encInt(int32(v)), nil
	case int8:
		return encInt(int32(v)), nil
	case uint8:
		return encInt(int32(v)), nil
	case string:
		i, err := strconv.ParseInt(v, 10, 32)
		if err != nil {
			return nil, marshalErrorf("can not marshal string to int: %s", err)
		}
		return encInt(int32(i)), nil
	}

	if value == nil {
		return nil, nil
	}

	switch rv := reflect.ValueOf(value); rv.Type().Kind() {
	case reflect.Int, reflect.Int64, reflect.Int32, reflect.Int16, reflect.Int8:
		v := rv.Int()
		if v > math.MaxInt32 || v < math.MinInt32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case reflect.Uint, reflect.Uint64, reflect.Uint32, reflect.Uint16, reflect.Uint8:
		v := rv.Uint()
		if v > math.MaxInt32 {
			return nil, marshalErrorf("marshal int: value %d out of range", v)
		}
		return encInt(int32(v)), nil
	case reflect.Ptr:
		if rv.IsNil() {
			return nil, nil
		}
	}

	return nil, marshalErrorf("can not marshal %T into %s. Accepted types: Marshaler, int8, uint8, int16, uint16, int, uint, int32, uint32, int64, uint64, string, UnsetValue.", value, info)
}