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// Copyright 2022 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_INSTRUCTION_H_
#define SRC_TINT_IR_INSTRUCTION_H_
#include "src/tint/castable.h"
#include "src/tint/ir/value.h"
#include "src/tint/symbol_table.h"
#include "src/tint/utils/string_stream.h"
namespace tint::ir {
/// An instruction in the IR.
class Instruction : public Castable<Instruction> {
public:
Instruction(const Instruction& instr) = delete;
Instruction(Instruction&& instr) = delete;
/// Destructor
~Instruction() override;
Instruction& operator=(const Instruction& instr) = delete;
Instruction& operator=(Instruction&& instr) = delete;
/// @returns the result value for the instruction
Value* Result() const { return result_; }
/// Write the instruction to the given stream
/// @param out the stream to write to
/// @param st the symbol table
/// @returns the stream
virtual utils::StringStream& ToString(utils::StringStream& out,
const SymbolTable& st) const = 0;
protected:
/// Constructor
/// @param result the result value
explicit Instruction(Value* result);
private:
Value* result_ = nullptr;
};
} // namespace tint::ir
#endif // SRC_TINT_IR_INSTRUCTION_H_