| // 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_TYPE_ALIAS_TYPE_H_ |
| #define SRC_TYPE_ALIAS_TYPE_H_ |
| |
| #include <string> |
| |
| #include "src/symbol.h" |
| #include "src/type/type.h" |
| |
| namespace tint { |
| namespace type { |
| |
| /// A type alias type. Holds a name and pointer to another type. |
| class Alias : public Castable<Alias, Type> { |
| public: |
| /// Constructor |
| /// @param sym the symbol for the alias |
| /// @param subtype the alias'd type |
| Alias(const Symbol& sym, Type* subtype); |
| /// Move constructor |
| Alias(Alias&&); |
| /// Destructor |
| ~Alias() override; |
| |
| /// @returns the alias symbol |
| Symbol symbol() const { return symbol_; } |
| /// @returns the alias type |
| Type* type() const { return subtype_; } |
| |
| /// @returns the type_name for this type |
| std::string type_name() const override; |
| |
| /// @param mem_layout type of memory layout to use in calculation. |
| /// @returns minimum size required for this type, in bytes. |
| /// 0 for non-host shareable types. |
| uint64_t MinBufferBindingSize(MemoryLayout mem_layout) const override; |
| |
| /// @param mem_layout type of memory layout to use in calculation. |
| /// @returns base alignment for the type, in bytes. |
| /// 0 for non-host shareable types. |
| uint64_t BaseAlignment(MemoryLayout mem_layout) const override; |
| |
| /// Clones this type and all transitive types using the `CloneContext` `ctx`. |
| /// @param ctx the clone context |
| /// @return the newly cloned type |
| Alias* Clone(CloneContext* ctx) const override; |
| |
| private: |
| Symbol const symbol_; |
| Type* const subtype_; |
| }; |
| |
| } // namespace type |
| } // namespace tint |
| |
| #endif // SRC_TYPE_ALIAS_TYPE_H_ |