31 lines
817 B
Go
31 lines
817 B
Go
package nul
|
||
|
||
import (
|
||
"encoding/json"
|
||
|
||
"sourcecode.social/reiver/go-erorr"
|
||
)
|
||
|
||
var _ json.Marshaler = Nothing[bool]()
|
||
var _ json.Marshaler = Nothing[string]()
|
||
|
||
// MarshalJSON makes it so json.Marshaler is implemented.
|
||
func (receiver Nullable[T]) MarshalJSON() ([]byte, error) {
|
||
switch interface{}(receiver.value).(type) {
|
||
case bool, string,json.Marshaler:
|
||
// these are OK.
|
||
default:
|
||
return nil, erorr.Errorf("nul: cannot marshal something of type %T into JSON because parameterized type is ‘%T’ rather than ‘bool’, ‘string’, or ‘json.Marshaler’", receiver, receiver.value)
|
||
}
|
||
|
||
if receiver.isnothing() {
|
||
return nil, erorr.Errorf("nul: cannot marshal nul.Nothing[%T]() into JSON", receiver.value)
|
||
}
|
||
|
||
if receiver.isnull {
|
||
return json.Marshal(nil)
|
||
}
|
||
|
||
return json.Marshal(receiver.value)
|
||
}
|