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// Copyright 2023 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_IR_VAR_H_
#define SRC_TINT_IR_VAR_H_
#include "src/tint/builtin/access.h"
#include "src/tint/builtin/address_space.h"
#include "src/tint/ir/binding_point.h"
#include "src/tint/ir/operand_instruction.h"
#include "src/tint/type/pointer.h"
#include "src/tint/utils/castable.h"
#include "src/tint/utils/vector.h"
namespace tint::ir {
/// A var instruction in the IR.
class Var : public utils::Castable<Var, OperandInstruction<1>> {
public:
/// Constructor
/// @param type the type of the var
explicit Var(const type::Pointer* type);
~Var() override;
/// @returns the type of the var
const type::Pointer* Type() override { return type_; }
/// Sets the var initializer
/// @param initializer the initializer
void SetInitializer(Value* initializer);
/// @returns the initializer
Value* Initializer() { return operands_[0]; }
/// Sets the binding point
/// @param group the group
/// @param binding the binding
void SetBindingPoint(uint32_t group, uint32_t binding) { binding_point_ = {group, binding}; }
/// @returns the binding points if `Attributes` contains `kBindingPoint`
std::optional<struct BindingPoint> BindingPoint() { return binding_point_; }
private:
const type::Pointer* type_ = nullptr;
std::optional<struct BindingPoint> binding_point_;
};
} // namespace tint::ir
#endif // SRC_TINT_IR_VAR_H_