mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
88 lines
3.1 KiB
C++
88 lines
3.1 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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* Component that can compare ASTs for equality on a syntactic basis.
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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 <map>
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#include <type_traits>
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namespace yul
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{
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/**
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* Component that can compare ASTs for equality on a syntactic basis.
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* Ignores source locations and allows for different variable names but requires exact matches otherwise.
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*
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* Prerequisite: Disambiguator (unless only expressions are compared)
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*/
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class SyntacticallyEqual
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{
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public:
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bool operator()(Expression const& _lhs, Expression const& _rhs);
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bool operator()(Statement const& _lhs, Statement const& _rhs);
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bool expressionEqual(FunctionCall const& _lhs, FunctionCall const& _rhs);
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bool expressionEqual(Identifier const& _lhs, Identifier const& _rhs);
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bool expressionEqual(Literal const& _lhs, Literal const& _rhs);
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bool statementEqual(ExpressionStatement const& _lhs, ExpressionStatement const& _rhs);
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bool statementEqual(Assignment const& _lhs, Assignment const& _rhs);
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bool statementEqual(VariableDeclaration const& _lhs, VariableDeclaration const& _rhs);
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bool statementEqual(FunctionDefinition const& _lhs, FunctionDefinition const& _rhs);
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bool statementEqual(If const& _lhs, If const& _rhs);
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bool statementEqual(Switch const& _lhs, Switch const& _rhs);
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bool switchCaseEqual(Case const& _lhs, Case const& _rhs);
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bool statementEqual(ForLoop const& _lhs, ForLoop const& _rhs);
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bool statementEqual(Break const&, Break const&) { return true; }
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bool statementEqual(Continue const&, Continue const&) { return true; }
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bool statementEqual(Leave const&, Leave const&) { return true; }
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bool statementEqual(Block const& _lhs, Block const& _rhs);
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private:
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bool visitDeclaration(TypedName const& _lhs, TypedName const& _rhs);
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template<typename U, typename V>
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bool expressionEqual(U const&, V const&, std::enable_if_t<!std::is_same<U, V>::value>* = nullptr)
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{
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return false;
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}
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template<typename U, typename V>
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bool statementEqual(U const&, V const&, std::enable_if_t<!std::is_same<U, V>::value>* = nullptr)
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{
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return false;
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}
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template<typename T, bool (SyntacticallyEqual::*CompareMember)(T const&, T const&)>
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bool compareUniquePtr(std::unique_ptr<T> const& _lhs, std::unique_ptr<T> const& _rhs)
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{
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return (_lhs == _rhs) || (_lhs && _rhs && (this->*CompareMember)(*_lhs, *_rhs));
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}
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std::size_t m_idsUsed = 0;
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std::map<YulString, std::size_t> m_identifiersLHS;
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std::map<YulString, std::size_t> m_identifiersRHS;
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};
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}
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