112 lines
2.3 KiB
Go
112 lines
2.3 KiB
Go
package option
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import "strconv"
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// ================================ Uint ================================
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// Uint is the option type for unsigned integers (uint).
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type Uint *uint
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// ZeroUint is a Uint with 0 as value.
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var ZeroUint = NewUint(0)
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// NewUint creates a new Uint using the value of the passed uint.
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func NewUint(u uint) Uint { return &u }
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// ================================ Int ================================
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// Int is the option type for integers (int).
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type Int *int
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// ZeroInt is an Int with 0 as value.
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var ZeroInt = NewInt(0)
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// NewInt creates a new Int using the value of the passed int.
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func NewInt(i int) Int { return &i }
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// ================================ NullableUint ================================
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// NullableUint is a nullable version of an unsigned integer (uint).
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type NullableUint = *NullableUintData
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type NullableUintData struct {
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Val uint
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Init bool
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}
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// NullUint serializes to JSON null.
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var NullUint = &NullableUintData{}
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// NewUint creates a new non-null NullableUint using the value of the passed uint.
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func NewNullableUint(v uint) NullableUint {
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return &NullableUintData{
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Val: v,
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Init: true,
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}
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}
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func (u NullableUintData) MarshalJSON() ([]byte, error) {
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if !u.Init {
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return []byte("null"), nil
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}
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return []byte(strconv.FormatUint(uint64(u.Val), 10)), nil
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}
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func (u *NullableUintData) UnmarshalJSON(json []byte) error {
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s := string(json)
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if s == "null" {
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return nil
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}
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v, err := strconv.ParseUint(s, 10, 64)
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u.Val = uint(v)
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u.Init = true
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return err
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}
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// ================================ NullableInt ================================
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// NullableInt is a nullable version of an integer (int).
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type NullableInt = *NullableIntData
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type NullableIntData struct {
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Val int
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Init bool
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}
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// NullInt serializes to JSON null.
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var NullInt = &NullableIntData{}
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// NewInt creates a new non-null NullableInt using the value of the passed int.
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func NewNullableInt(v int) NullableInt {
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return &NullableIntData{
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Val: v,
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Init: true,
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}
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}
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func (i NullableIntData) MarshalJSON() ([]byte, error) {
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if !i.Init {
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return []byte("null"), nil
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}
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return []byte(strconv.FormatUint(uint64(i.Val), 10)), nil
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}
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func (i *NullableIntData) UnmarshalJSON(json []byte) error {
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s := string(json)
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if s == "null" {
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return nil
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}
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v, err := strconv.ParseUint(s, 10, 64)
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i.Val = int(v)
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i.Init = true
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return err
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}
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