Method marshalSingularValue

jsonpb/encode.go:514–560

(fd protoreflect.FieldDescriptor, v protoreflect.Value, indent string)

}

func (w *jsonWriter) marshalSingularValue(fd protoreflect.FieldDescriptor, v protoreflect.Value, indent string) error {
	switch {
	case !v.IsValid():
		w.write("null")
		return nil
	case fd.Message() != nil:
		return w.marshalMessage(v.Message(), indent+w.Indent, "")
	case fd.Enum() != nil:
		if fd.Enum().FullName() == "google.protobuf.NullValue" {
			w.write("null")
			return nil
		}

		vd := fd.Enum().Values().ByNumber(v.Enum())
		if vd == nil || w.EnumsAsInts {
			w.write(strconv.Itoa(int(v.Enum())))
		} else {
			w.write(`"` + string(vd.Name()) + `"`)
		}
		return nil
	default:
		switch v.Interface().(type) {
		case float32, float64:
			switch {
			case math.IsInf(v.Float(), +1):
				w.write(`"Infinity"`)
				return nil
			case math.IsInf(v.Float(), -1):
				w.write(`"-Infinity"`)
				return nil
			case math.IsNaN(v.Float()):
				w.write(`"NaN"`)
				return nil
			}
		case int64, uint64:
			w.write(fmt.Sprintf(`"%d"`, v.Interface()))
			return nil
		}

		b, err := json.Marshal(v.Interface())
		if err != nil {
			return err
		}
		w.write(string(b))
		return nil
	}
}