mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
77 lines
2.3 KiB
C++
77 lines
2.3 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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#include <libyul/optimiser/SyntacticalEquality.h>
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#include <libyul/Exceptions.h>
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#include <libyul/AsmData.h>
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#include <libdevcore/CommonData.h>
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using namespace std;
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using namespace dev;
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using namespace yul;
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bool SyntacticalEqualityChecker::equal(Expression const& _e1, Expression const& _e2)
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{
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if (_e1.type() != _e2.type())
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return false;
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// TODO This somehow calls strcmp - WHERE?
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// TODO This should be replaced by some kind of AST walker as soon as it gets
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// more complex.
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if (_e1.type() == typeid(FunctionalInstruction))
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{
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auto const& e1 = boost::get<FunctionalInstruction>(_e1);
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auto const& e2 = boost::get<FunctionalInstruction>(_e2);
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return
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e1.instruction == e2.instruction &&
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equalVector(e1.arguments, e2.arguments);
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}
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else if (_e1.type() == typeid(FunctionCall))
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{
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auto const& e1 = boost::get<FunctionCall>(_e1);
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auto const& e2 = boost::get<FunctionCall>(_e2);
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return
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equal(e1.functionName, e2.functionName) &&
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equalVector(e1.arguments, e2.arguments);
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}
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else if (_e1.type() == typeid(Identifier))
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return boost::get<Identifier>(_e1).name == boost::get<Identifier>(_e2).name;
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else if (_e1.type() == typeid(Literal))
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{
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auto const& e1 = boost::get<Literal>(_e1);
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auto const& e2 = boost::get<Literal>(_e2);
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return e1.kind == e2.kind && e1.value == e2.value && e1.type == e2.type;
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}
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else
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{
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assertThrow(false, OptimizerException, "Invalid expression");
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}
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return false;
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}
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bool SyntacticalEqualityChecker::equalVector(vector<Expression> const& _e1, vector<Expression> const& _e2)
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{
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return _e1.size() == _e2.size() &&
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std::equal(begin(_e1), end(_e1), begin(_e2), SyntacticalEqualityChecker::equal);
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}
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