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