Function isDefaultScalar

testing/protocmp/util.go:373–404

(m Message, k string)

}

func isDefaultScalar(m Message, k string) bool {
	if _, ok := m[k]; !ok {
		return true
	}

	var fd protoreflect.FieldDescriptor
	switch mm := m[messageTypeKey].(messageMeta); {
	case protoreflect.Name(k).IsValid():
		fd = mm.md.Fields().ByTextName(k)
	default:
		fd = mm.xds[k]
	}
	if fd == nil || !fd.Default().IsValid() {
		return false
	}
	switch fd.Kind() {
	case protoreflect.BytesKind:
		v, ok := m[k].([]byte)
		return ok && bytes.Equal(fd.Default().Bytes(), v)
	case protoreflect.FloatKind:
		v, ok := m[k].(float32)
		return ok && equalFloat64(fd.Default().Float(), float64(v))
	case protoreflect.DoubleKind:
		v, ok := m[k].(float64)
		return ok && equalFloat64(fd.Default().Float(), float64(v))
	case protoreflect.EnumKind:
		v, ok := m[k].(Enum)
		return ok && fd.Default().Enum() == v.Number()
	default:
		return reflect.DeepEqual(fd.Default().Interface(), m[k])
	}
}

func equalFloat64(x, y float64) bool {
	return x == y || (math.IsNaN(x) && math.IsNaN(y))