mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
59 lines
1.7 KiB
C++
59 lines
1.7 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/>.
|
|
*/
|
|
/**
|
|
* Optimiser component that can create new unique names.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <libyul/AsmDataForward.h>
|
|
|
|
#include <libyul/YulString.h>
|
|
|
|
#include <set>
|
|
|
|
namespace yul
|
|
{
|
|
|
|
/**
|
|
* Optimizer component that can be used to generate new names that
|
|
* do not conflict with existing names.
|
|
*
|
|
* Tries to keep names short and appends decimals to disambiguate.
|
|
*/
|
|
class NameDispenser
|
|
{
|
|
public:
|
|
/// Initialize the name dispenser with all the names used in the given AST.
|
|
explicit NameDispenser(Block const& _ast);
|
|
/// Initialize the name dispenser with the given used names.
|
|
explicit NameDispenser(std::set<YulString> _usedNames);
|
|
|
|
/// @returns a currently unused name that should be similar to _nameHint
|
|
/// and prefixed by _context if present.
|
|
/// If the resulting name would be too long, trims the context at the end
|
|
/// and the name hint at the start.
|
|
YulString newName(YulString _nameHint, YulString _context = {});
|
|
|
|
private:
|
|
YulString newNameInternal(YulString _nameHint);
|
|
|
|
std::set<YulString> m_usedNames;
|
|
size_t m_counter = 0;
|
|
};
|
|
|
|
}
|