mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/*
|
|
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
|
|
/**
|
|
* Optimiser component that can create new unique names.
|
|
*/
|
|
|
|
#include <libyul/optimiser/NameDispenser.h>
|
|
|
|
#include <libyul/optimiser/NameCollector.h>
|
|
#include <libyul/optimiser/OptimizerUtilities.h>
|
|
#include <libyul/AST.h>
|
|
#include <libyul/Dialect.h>
|
|
#include <libyul/YulString.h>
|
|
|
|
#include <libsolutil/CommonData.h>
|
|
|
|
using namespace std;
|
|
using namespace solidity;
|
|
using namespace solidity::yul;
|
|
using namespace solidity::util;
|
|
|
|
NameDispenser::NameDispenser(Dialect const& _dialect, Block const& _ast, set<YulString> _reservedNames):
|
|
NameDispenser(_dialect, NameCollector(_ast).names() + _reservedNames)
|
|
{
|
|
m_reservedNames = std::move(_reservedNames);
|
|
}
|
|
|
|
NameDispenser::NameDispenser(Dialect const& _dialect, set<YulString> _usedNames):
|
|
m_dialect(_dialect),
|
|
m_usedNames(std::move(_usedNames))
|
|
{
|
|
}
|
|
|
|
YulString NameDispenser::newName(YulString _nameHint)
|
|
{
|
|
YulString name = _nameHint;
|
|
while (illegalName(name))
|
|
{
|
|
m_counter++;
|
|
name = YulString(_nameHint.str() + "_" + to_string(m_counter));
|
|
}
|
|
m_usedNames.emplace(name);
|
|
return name;
|
|
}
|
|
|
|
bool NameDispenser::illegalName(YulString _name)
|
|
{
|
|
return isRestrictedIdentifier(m_dialect, _name) || m_usedNames.count(_name);
|
|
}
|
|
|
|
void NameDispenser::reset(Block const& _ast)
|
|
{
|
|
m_usedNames = NameCollector(_ast).names() + m_reservedNames;
|
|
m_counter = 0;
|
|
}
|