mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
123 lines
4.0 KiB
C++
123 lines
4.0 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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* Creates an independent copy of an AST, renaming identifiers to be unique.
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*/
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#pragma once
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#include <libyul/AsmDataForward.h>
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#include <libyul/YulString.h>
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#include <boost/variant.hpp>
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#include <memory>
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#include <optional>
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#include <set>
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#include <vector>
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namespace yul
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{
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class ExpressionCopier: public boost::static_visitor<Expression>
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{
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public:
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virtual ~ExpressionCopier() = default;
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virtual Expression operator()(Literal const& _literal) = 0;
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virtual Expression operator()(Identifier const& _identifier) = 0;
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virtual Expression operator()(FunctionCall const&) = 0;
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};
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class StatementCopier: public boost::static_visitor<Statement>
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{
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public:
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virtual ~StatementCopier() = default;
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virtual Statement operator()(ExpressionStatement const& _statement) = 0;
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virtual Statement operator()(Assignment const& _assignment) = 0;
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virtual Statement operator()(VariableDeclaration const& _varDecl) = 0;
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virtual Statement operator()(If const& _if) = 0;
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virtual Statement operator()(Switch const& _switch) = 0;
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virtual Statement operator()(FunctionDefinition const&) = 0;
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virtual Statement operator()(ForLoop const&) = 0;
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virtual Statement operator()(Break const&) = 0;
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virtual Statement operator()(Continue const&) = 0;
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virtual Statement operator()(Leave const&) = 0;
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virtual Statement operator()(Block const& _block) = 0;
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};
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/**
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* Creates a copy of a Yul AST potentially replacing identifier names.
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* Base class to be extended.
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*/
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class ASTCopier: public ExpressionCopier, public StatementCopier
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{
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public:
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virtual ~ASTCopier() = default;
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Expression operator()(Literal const& _literal) override;
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Expression operator()(Identifier const& _identifier) override;
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Expression operator()(FunctionCall const&) override;
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Statement operator()(ExpressionStatement const& _statement) override;
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Statement operator()(Assignment const& _assignment) override;
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Statement operator()(VariableDeclaration const& _varDecl) override;
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Statement operator()(If const& _if) override;
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Statement operator()(Switch const& _switch) override;
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Statement operator()(FunctionDefinition const&) override;
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Statement operator()(ForLoop const&) override;
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Statement operator()(Break const&) override;
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Statement operator()(Continue const&) override;
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Statement operator()(Leave const&) override;
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Statement operator()(Block const& _block) override;
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virtual Expression translate(Expression const& _expression);
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virtual Statement translate(Statement const& _statement);
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protected:
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template <typename T>
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std::vector<T> translateVector(std::vector<T> const& _values);
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template <typename T>
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std::unique_ptr<T> translate(std::unique_ptr<T> const& _v)
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{
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return _v ? std::make_unique<T>(translate(*_v)) : nullptr;
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}
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Block translate(Block const& _block);
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Case translate(Case const& _case);
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virtual Identifier translate(Identifier const& _identifier);
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Literal translate(Literal const& _literal);
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TypedName translate(TypedName const& _typedName);
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virtual void enterScope(Block const&) { }
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virtual void leaveScope(Block const&) { }
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virtual void enterFunction(FunctionDefinition const&) { }
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virtual void leaveFunction(FunctionDefinition const&) { }
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virtual YulString translateIdentifier(YulString _name) { return _name; }
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};
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template <typename T>
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std::vector<T> ASTCopier::translateVector(std::vector<T> const& _values)
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{
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std::vector<T> translated;
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for (auto const& v: _values)
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translated.emplace_back(translate(v));
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return translated;
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}
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}
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