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/*
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/>.
*/
/**
* Component that can compare ASTs for equality on a syntactic basis.
*/
#pragma once
#include <libyul/AsmDataForward.h>
#include <libyul/YulString.h>
#include <map>
#include <type_traits>
namespace yul
{
/**
* Component that can compare ASTs for equality on a syntactic basis.
* Ignores source locations and allows for different variable names but requires exact matches otherwise.
*
* Prerequisite: Disambiguator (unless only expressions are compared)
*/
class SyntacticallyEqual
{
public:
bool operator()(Expression const& _lhs, Expression const& _rhs);
bool operator()(Statement const& _lhs, Statement const& _rhs);
bool expressionEqual(FunctionalInstruction const& _lhs, FunctionalInstruction const& _rhs);
bool expressionEqual(FunctionCall const& _lhs, FunctionCall const& _rhs);
bool expressionEqual(Identifier const& _lhs, Identifier const& _rhs);
bool expressionEqual(Literal const& _lhs, Literal const& _rhs);
bool statementEqual(ExpressionStatement const& _lhs, ExpressionStatement const& _rhs);
bool statementEqual(Assignment const& _lhs, Assignment const& _rhs);
bool statementEqual(VariableDeclaration const& _lhs, VariableDeclaration const& _rhs);
bool statementEqual(FunctionDefinition const& _lhs, FunctionDefinition const& _rhs);
bool statementEqual(If const& _lhs, If const& _rhs);
bool statementEqual(Switch const& _lhs, Switch const& _rhs);
bool switchCaseEqual(Case const& _lhs, Case const& _rhs);
bool statementEqual(ForLoop const& _lhs, ForLoop const& _rhs);
bool statementEqual(Block const& _lhs, Block const& _rhs);
private:
bool statementEqual(Instruction const& _lhs, Instruction const& _rhs);
bool statementEqual(Label const& _lhs, Label const& _rhs);
bool statementEqual(StackAssignment const& _lhs, StackAssignment const& _rhs);
bool visitDeclaration(TypedName const& _lhs, TypedName const& _rhs);
template<typename U, typename V>
bool expressionEqual(U const&, V const&, std::enable_if_t<!std::is_same<U, V>::value>* = nullptr)
{
return false;
}
template<typename U, typename V>
bool statementEqual(U const&, V const&, std::enable_if_t<!std::is_same<U, V>::value>* = nullptr)
{
return false;
}
template<typename T, bool (SyntacticallyEqual::*CompareMember)(T const&, T const&)>
bool compareUniquePtr(std::unique_ptr<T> const& _lhs, std::unique_ptr<T> const& _rhs)
{
return (_lhs == _rhs) || (_lhs && _rhs && (this->*CompareMember)(*_lhs, *_rhs));
}
std::size_t m_idsUsed = 0;
std::map<YulString, std::size_t> m_identifiersLHS;
std::map<YulString, std::size_t> m_identifiersRHS;
};
}
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