go-nul/nullable_marshaljson.go

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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)
}