Class Attribute

base/attribute.h:178–214

Attribute represents resolved attribute path.

// Attribute represents resolved attribute path.
class Attribute final {
 public:
  explicit Attribute(std::string variable_name)
      : Attribute(std::move(variable_name), {}) {}

  Attribute(std::string variable_name,
            std::vector<AttributeQualifier> qualifier_path)
      : impl_(std::make_shared<Impl>(std::move(variable_name),
                                     std::move(qualifier_path))) {}

  absl::string_view variable_name() const { return impl_->variable_name; }

  bool has_variable_name() const { return !impl_->variable_name.empty(); }

  absl::Span<const AttributeQualifier> qualifier_path() const {
    return impl_->qualifier_path;
  }

  bool operator==(const Attribute& other) const;

  bool operator<(const Attribute& other) const;

  const absl::StatusOr<std::string> AsString() const;

 private:
  struct Impl final {
    Impl(std::string variable_name,
         std::vector<AttributeQualifier> qualifier_path)
        : variable_name(std::move(variable_name)),
          qualifier_path(std::move(qualifier_path)) {}

    std::string variable_name;
    std::vector<AttributeQualifier> qualifier_path;
  };

  std::shared_ptr<const Impl> impl_;
};

// AttributePattern is a fully-qualified absolute attribute path pattern.
// Supported segments steps in the path are: