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// Copyright 2020 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
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#ifndef SRC_TINT_LANG_WGSL_AST_ATTRIBUTE_H_
#define SRC_TINT_LANG_WGSL_AST_ATTRIBUTE_H_
#include <string>
#include "src/tint/lang/wgsl/ast/node.h"
#include "src/tint/utils/containers/vector.h"
namespace tint::ast {
/// The base class for all attributes
class Attribute : public Castable<Attribute, Node> {
public:
~Attribute() override;
/// @returns the WGSL name for the attribute
virtual std::string Name() const = 0;
protected:
/// Constructor
/// @param pid the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param src the source of this node
Attribute(GenerationID pid, NodeID nid, const Source& src) : Base(pid, nid, src) {}
};
/// @param attributes the list of attributes to search
/// @returns true if `attributes` includes a attribute of type `T`
template <typename... Ts>
bool HasAttribute(VectorRef<const Attribute*> attributes) {
for (auto* attr : attributes) {
if (attr->IsAnyOf<Ts...>()) {
return true;
}
}
return false;
}
/// @param attributes the list of attributes to search
/// @returns a pointer to `T` from `attributes` if found, otherwise nullptr.
template <typename T>
const T* GetAttribute(VectorRef<const Attribute*> attributes) {
for (auto* attr : attributes) {
if (attr->Is<T>()) {
return attr->As<T>();
}
}
return nullptr;
}
} // namespace tint::ast
#endif // SRC_TINT_LANG_WGSL_AST_ATTRIBUTE_H_