69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_AST_DECORATION_H_
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#define SRC_AST_DECORATION_H_
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#include <vector>
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#include "src/ast/node.h"
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namespace tint {
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namespace ast {
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/// The base class for all decorations
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class Decoration : public Castable<Decoration, Node> {
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public:
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~Decoration() override;
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protected:
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/// Constructor
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/// @param program_id the identifier of the program that owns this node
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/// @param source the source of this decoration
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Decoration(ProgramID program_id, const Source& source)
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: Base(program_id, source) {}
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};
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/// A list of decorations
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using DecorationList = std::vector<Decoration*>;
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/// @param decorations the list of decorations to search
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/// @returns true if `decorations` includes a decoration of type `T`
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template <typename T>
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bool HasDecoration(const DecorationList& decorations) {
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for (auto* deco : decorations) {
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if (deco->Is<T>()) {
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return true;
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}
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}
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return false;
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}
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/// @param decorations the list of decorations to search
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/// @returns a pointer to `T` from `decorations` if found, otherwise nullptr.
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template <typename T>
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T* GetDecoration(const DecorationList& decorations) {
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for (auto* deco : decorations) {
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if (deco->Is<T>()) {
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return deco->As<T>();
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}
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}
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return nullptr;
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}
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} // namespace ast
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} // namespace tint
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#endif // SRC_AST_DECORATION_H_
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