mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* Optimiser component that can create new unique names.
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*/
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#include <libyul/optimiser/NameDispenser.h>
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#include <libyul/optimiser/NameCollector.h>
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#include <libyul/optimiser/OptimizerUtilities.h>
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#include <libyul/AST.h>
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#include <libyul/Dialect.h>
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#include <libyul/YulString.h>
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#include <libsolutil/CommonData.h>
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using namespace solidity;
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using namespace solidity::yul;
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using namespace solidity::util;
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NameDispenser::NameDispenser(Dialect const& _dialect, Block const& _ast, std::set<YulString> _reservedNames):
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NameDispenser(_dialect, NameCollector(_ast).names() + _reservedNames)
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{
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m_reservedNames = std::move(_reservedNames);
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}
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NameDispenser::NameDispenser(Dialect const& _dialect, std::set<YulString> _usedNames):
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m_dialect(_dialect),
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m_usedNames(std::move(_usedNames))
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{
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}
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YulString NameDispenser::newName(YulString _nameHint)
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{
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YulString name = _nameHint;
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while (illegalName(name))
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{
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m_counter++;
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name = YulString(_nameHint.str() + "_" + std::to_string(m_counter));
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}
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m_usedNames.emplace(name);
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return name;
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}
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bool NameDispenser::illegalName(YulString _name)
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{
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return isRestrictedIdentifier(m_dialect, _name) || m_usedNames.count(_name);
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}
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void NameDispenser::reset(Block const& _ast)
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{
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m_usedNames = NameCollector(_ast).names() + m_reservedNames;
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m_counter = 0;
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}
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