/*

  This file is part of solidity.

  solidity is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  solidity is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with solidity.  If not, see <http://www.gnu.org/licenses/>.

*/

// SPDX-License-Identifier: GPL-3.0

#pragma once

#include <libyul/ASTForward.h>

#include <libyul/optimiser/ASTWalker.h>

#include <libyul/optimiser/OptimiserStep.h>

namespace solidity::yul

{

/**

 * Rewrites variable declarations so that all of them are initialized.

 * Declarations like ``let x, y`` are split into multiple declaration

 * statements.

 * Only supports initializing with the zero literal for now.

 */

class VarDeclInitializer: public ASTModifier

{

public:

  static constexpr char const* name{"VarDeclInitializer"};

  static void run(OptimiserStepContext& _ctx, Block& _ast) { VarDeclInitializer{_ctx.dialect}(_ast); }

  void operator()(Block& _block) override;

private:

  explicit VarDeclInitializer(Dialect const& _dialect): m_dialect(_dialect) {}

  Dialect const& m_dialect;

};

}