libyul/optimiser/ForLoopInitRewriter.cpp


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/*
    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/>.
*/
#include <libyul/optimiser/ForLoopInitRewriter.h>
#include <libyul/AsmData.h>
#include <libdevcore/CommonData.h>
#include <functional>

using namespace std;
using namespace dev;
using namespace yul;

void ForLoopInitRewriter::operator()(Block& _block)
{
    iterateReplacing(
        _block.statements,
        [&](Statement& _stmt) -> boost::optional<vector<Statement>>
        {
            if (_stmt.type() == typeid(ForLoop))
            {
                auto& forLoop = boost::get<ForLoop>(_stmt);
                (*this)(forLoop.pre);
                (*this)(forLoop.body);
                (*this)(forLoop.post);
                vector<Statement> rewrite;
                swap(rewrite, forLoop.pre.statements);
                rewrite.emplace_back(move(forLoop));
                return rewrite;
            }
            else
            {
                visit(_stmt);
                return {};
            }
        }
    );
}