mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
62 lines
1.6 KiB
C++
62 lines
1.6 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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/**
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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/AsmData.h>
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using namespace std;
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using namespace dev;
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using namespace yul;
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NameDispenser::NameDispenser(Block const& _ast):
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NameDispenser(NameCollector(_ast).names())
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{
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}
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NameDispenser::NameDispenser(set<YulString> _usedNames):
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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, YulString _context)
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{
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// Shortening rules: Use a suffix of _prefix and a prefix of _context.
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YulString prefix = _nameHint;
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if (!_context.empty())
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prefix = YulString{_context.str().substr(0, 10) + "_" + prefix.str()};
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return newNameInternal(prefix);
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}
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YulString NameDispenser::newNameInternal(YulString _nameHint)
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{
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YulString name = _nameHint;
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while (name.empty() || m_usedNames.count(name))
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{
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m_counter++;
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name = YulString(_nameHint.str() + "_" + 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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