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