Empty string is not consistent

[a8ss]

Hello,

I encountered an issue with the following code:

func TestCabon2(t *testing.T) {
	j := []byte(`{"c":""}`)
	d := struct {
		C carbon.Carbon `json:"c"`
	}{}
	err := json.Unmarshal(j, &d)
	fmt.Printf("IsValid: %v, IsZero: %v, IsEmpty: %v, HasError: %v, err: %v\n", d.C.IsValid(), d.C.IsZero(), d.C.IsEmpty(), d.C.HasError(), err)

	c := carbon.Parse("")
	fmt.Printf("IsValid: %v, IsZero: %v, IsEmpty: %v, HasError: %v\n", c.IsValid(), c.IsZero(), c.IsEmpty(), c.HasError())
}

golang version: such as v1.23

carbon version: such as 2.5.12, 2.6.11

time zone: such as Japan

I expected to get:

IsValid: false, IsZero: false, IsEmpty: true, HasError: false

But I actually get:

IsValid: true, IsZero: true, IsEmpty: false, HasError: false, err: <nil>

Thanks!

[a8ss]

The Parse() method sets isEmpty to true

carbon/parser.go

Lines 11 to 14 in 82e0e29

	func Parse(value string, timezone ...string) *Carbon {
	if value == "" {
	return &Carbon{isEmpty: true}
	}

The UnmarshalJSON method does not

carbon/type_carbon.go

Lines 55 to 59 in 82e0e29

	func (c *Carbon) UnmarshalJSON(src []byte) error {
	v := string(bytes.Trim(src, `"`))
	if v == "" || v == "null" {
	return nil
	}

[a8ss]

why carbon.DateTime is good?

[a8ss]

why carbon.DateTime is good?

v2.5.x isEmpty: true

carbon/type_layout.go

Lines 69 to 74 in 3072f04

	func (t *LayoutType[T]) UnmarshalJSON(src []byte) error {
	v := string(bytes.Trim(src, `"`))
	if v == "" {
	t.isEmpty = true
	return nil
	}

v2.6.x is a pointer receiver, IsNil() == true