| // Copyright 2020 The Tint Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SRC_AST_DECORATION_H_ |
| #define SRC_AST_DECORATION_H_ |
| |
| #include <memory> |
| #include <ostream> |
| #include <vector> |
| |
| #include "src/ast/node.h" |
| #include "src/source.h" |
| |
| namespace tint { |
| namespace ast { |
| |
| /// The decoration kind enumerator |
| enum class DecorationKind { |
| kArray, |
| /*|*/ kStride, |
| kFunction, |
| /*|*/ kStage, |
| /*|*/ kWorkgroup, |
| kStruct, |
| kStructMember, |
| /*|*/ kStructMemberOffset, |
| kType, |
| /*|*/ kAccess, |
| kVariable, |
| /*|*/ kBinding, |
| /*|*/ kBuiltin, |
| /*|*/ kConstantId, |
| /*|*/ kLocation, |
| }; |
| |
| std::ostream& operator<<(std::ostream& out, DecorationKind data); |
| |
| /// The base class for all decorations |
| class Decoration : public Node { |
| public: |
| ~Decoration() override; |
| |
| /// @param kind the decoration kind |
| /// @return true if this Decoration is of the (or derives from) the given |
| /// kind. |
| virtual bool IsKind(DecorationKind kind) const = 0; |
| |
| /// @return true if this decoration is of (or derives from) type |TO| |
| template <typename TO> |
| bool Is() const { |
| return IsKind(TO::Kind); |
| } |
| |
| /// @return the decoration kind |
| DecorationKind GetKind() const { return kind_; } |
| |
| /// @returns true if the node is valid |
| bool IsValid() const override; |
| |
| protected: |
| /// Constructor |
| /// @param kind represents the derived type |
| /// @param source the source of this decoration |
| Decoration(DecorationKind kind, const Source& source) |
| : Node(source), kind_(kind) {} |
| |
| private: |
| DecorationKind const kind_; |
| }; |
| |
| /// As dynamically casts |deco| to the target type |TO|. |
| /// @return the cast decoration, or nullptr if |deco| is not of the type |TO|. |
| template <typename TO> |
| TO* As(Decoration* deco) { |
| if (deco == nullptr) { |
| return nullptr; |
| } |
| if (deco->Is<TO>()) { |
| return static_cast<TO*>(deco); |
| } |
| return nullptr; |
| } |
| |
| /// A list of decorations |
| using DecorationList = std::vector<Decoration*>; |
| |
| } // namespace ast |
| } // namespace tint |
| |
| #endif // SRC_AST_DECORATION_H_ |