Method IsMatch

base/attribute.h:166–169

  bool IsWildcard() const { return !value_.has_value(); }

  bool IsMatch(const AttributeQualifier& qualifier) const {
    if (IsWildcard()) return true;
    return value_.value() == qualifier;
  }

  bool IsMatch(absl::string_view other_key) const {
    if (!value_.has_value()) return true;