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