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// Copyright 2021 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_TINT_AST_INTERNAL_ATTRIBUTE_H_
#define SRC_TINT_AST_INTERNAL_ATTRIBUTE_H_
#include <string>
#include "src/tint/ast/attribute.h"
#include "src/tint/utils/vector.h"
// Forward declarations
namespace tint::ast {
class IdentifierExpression;
} // namespace tint::ast
namespace tint::ast {
/// An attribute used to indicate that a function is tint-internal.
/// These attributes are not produced by generators, but instead are usually
/// created by transforms for consumption by a particular backend.
class InternalAttribute : public Castable<InternalAttribute, Attribute> {
public:
/// Constructor
/// @param program_id the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param deps a list of identifiers that this attribute is dependent on
InternalAttribute(ProgramID program_id,
NodeID nid,
utils::VectorRef<const IdentifierExpression*> deps);
/// Destructor
~InternalAttribute() override;
/// @return a short description of the internal attribute which will be
/// displayed in WGSL as `@internal(<name>)` (but is not parsable).
virtual std::string InternalName() const = 0;
/// @returns the WGSL name for the attribute
std::string Name() const override;
/// A list of identifiers that this attribute is dependent on
const utils::Vector<const IdentifierExpression*, 1> dependencies;
};
} // namespace tint::ast
#endif // SRC_TINT_AST_INTERNAL_ATTRIBUTE_H_