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// 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_WORKGROUP_ATTRIBUTE_H_
#define SRC_AST_WORKGROUP_ATTRIBUTE_H_
#include <array>
#include <string>
#include "src/ast/attribute.h"
namespace tint {
namespace ast {
// Forward declaration
class Expression;
/// A workgroup attribute
class WorkgroupAttribute : public Castable<WorkgroupAttribute, Attribute> {
public:
/// constructor
/// @param pid the identifier of the program that owns this node
/// @param src the source of this node
/// @param x the workgroup x dimension expression
/// @param y the optional workgroup y dimension expression
/// @param z the optional workgroup z dimension expression
WorkgroupAttribute(ProgramID pid,
const Source& src,
const ast::Expression* x,
const ast::Expression* y = nullptr,
const ast::Expression* z = nullptr);
~WorkgroupAttribute() override;
/// @returns the workgroup dimensions
std::array<const ast::Expression*, 3> Values() const { return {x, y, z}; }
/// @returns the WGSL name for the attribute
std::string Name() const override;
/// Clones this node and all transitive child nodes using the `CloneContext`
/// `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
const WorkgroupAttribute* Clone(CloneContext* ctx) const override;
/// The workgroup x dimension.
const ast::Expression* const x;
/// The optional workgroup y dimension. May be null.
const ast::Expression* const y = nullptr;
/// The optional workgroup z dimension. May be null.
const ast::Expression* const z = nullptr;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_WORKGROUP_ATTRIBUTE_H_