/*

  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

/**

 * Generic AST walker.

 */

#include <libyul/optimiser/ASTWalker.h>

#include <libyul/AST.h>

#include <range/v3/view/reverse.hpp>

using namespace solidity;

using namespace solidity::yul;

using namespace solidity::util;

void ASTWalker::operator()(FunctionCall const& _funCall)

{

  // Does not visit _funCall.functionName on purpose

  walkVector(_funCall.arguments | ranges::views::reverse);

}

void ASTWalker::operator()(ExpressionStatement const& _statement)

{

  visit(_statement.expression);

}

void ASTWalker::operator()(Assignment const& _assignment)

{

  for (auto const& name: _assignment.variableNames)

    (*this)(name);

  visit(*_assignment.value);

}

void ASTWalker::operator()(VariableDeclaration const& _varDecl)

{

  if (_varDecl.value)

    visit(*_varDecl.value);

}

void ASTWalker::operator()(If const& _if)

{

  visit(*_if.condition);

  (*this)(_if.body);

}

void ASTWalker::operator()(Switch const& _switch)

{

  visit(*_switch.expression);

  for (auto const& _case: _switch.cases)

  {

    if (_case.value)

      (*this)(*_case.value);

    (*this)(_case.body);

  }

}

void ASTWalker::operator()(FunctionDefinition const& _fun)

{

  (*this)(_fun.body);

}

void ASTWalker::operator()(ForLoop const& _for)

{

  (*this)(_for.pre);

  visit(*_for.condition);

  (*this)(_for.body);

  (*this)(_for.post);

}

void ASTWalker::operator()(Block const& _block)

{

  walkVector(_block.statements);

}

void ASTWalker::visit(Statement const& _st)

{

  std::visit(*this, _st);

}

void ASTWalker::visit(Expression const& _e)

{

  std::visit(*this, _e);

}

void ASTModifier::operator()(FunctionCall& _funCall)

{

  // Does not visit _funCall.functionName on purpose

  walkVector(_funCall.arguments | ranges::views::reverse);

}

void ASTModifier::operator()(ExpressionStatement& _statement)

{

  visit(_statement.expression);

}

void ASTModifier::operator()(Assignment& _assignment)

{

  for (auto& name: _assignment.variableNames)

    (*this)(name);

  visit(*_assignment.value);

}

void ASTModifier::operator()(VariableDeclaration& _varDecl)

{

  if (_varDecl.value)

    visit(*_varDecl.value);

}

void ASTModifier::operator()(If& _if)

{

  visit(*_if.condition);

  (*this)(_if.body);

}

void ASTModifier::operator()(Switch& _switch)

{

  visit(*_switch.expression);

  for (auto& _case: _switch.cases)

  {

    if (_case.value)

      (*this)(*_case.value);

    (*this)(_case.body);

  }

}

void ASTModifier::operator()(FunctionDefinition& _fun)

{

  (*this)(_fun.body);

}

void ASTModifier::operator()(ForLoop& _for)

{

  (*this)(_for.pre);

  visit(*_for.condition);

  (*this)(_for.post);

  (*this)(_for.body);

}

void ASTModifier::operator()(Break&)

{

}

void ASTModifier::operator()(Continue&)

{

}

void ASTModifier::operator()(Leave&)

{

}

void ASTModifier::operator()(Block& _block)

{

  walkVector(_block.statements);

}

void ASTModifier::visit(Statement& _st)

{

  std::visit(*this, _st);

}

void ASTModifier::visit(Expression& _e)

{

  std::visit(*this, _e);

}