51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package option
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import (
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"encoding/json"
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)
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// ================================ String ================================
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// String is the option type for strings.
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type String *string
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// NewString creates a new String with the value of the passed string.
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func NewString(s string) String { return &s }
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// ================================ NullableString ================================
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// NullableString is a nullable version of a string.
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type NullableString = *NullableStringData
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type NullableStringData struct {
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Val string
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Init bool
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}
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// NullBool serializes to JSON null.
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var NullString = &NullableStringData{}
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// NewNullableString creates a new non-null NullableString with the value of the passed string.
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func NewNullableString(v string) NullableString {
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return &NullableStringData{
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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 (s NullableStringData) MarshalJSON() ([]byte, error) {
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if !s.Init {
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return []byte("null"), nil
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}
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return json.Marshal(s.Val)
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}
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func (s *NullableStringData) UnmarshalJSON(b []byte) error {
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if string(b) == "null" {
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return nil
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}
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s.Init = true
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return json.Unmarshal(b, &s.Val)
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}
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