solidity/libsolidity/codegen/ReturnInfo.cpp

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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/>.
*/
// SPDX-License-Identifier: GPL-3.0
#include <libsolidity/codegen/ReturnInfo.h>
#include <libsolidity/ast/Types.h>
#include <libsolidity/ast/AST.h>
using namespace solidity::frontend;
using namespace solidity::langutil;
ReturnInfo::ReturnInfo(EVMVersion const& _evmVersion, FunctionType const& _functionType)
{
FunctionType::Kind const funKind = _functionType.kind();
bool const haveReturndatacopy = _evmVersion.supportsReturndata();
bool const returnSuccessConditionAndReturndata =
funKind == FunctionType::Kind::BareCall ||
funKind == FunctionType::Kind::BareDelegateCall ||
funKind == FunctionType::Kind::BareStaticCall;
if (!returnSuccessConditionAndReturndata)
{
if (haveReturndatacopy)
returnTypes = _functionType.returnParameterTypes();
else
returnTypes = _functionType.returnParameterTypesWithoutDynamicTypes();
for (auto const& retType: returnTypes)
{
solAssert(retType->decodingType(), "");
if (retType->decodingType()->isDynamicallyEncoded())
{
solAssert(haveReturndatacopy, "");
dynamicReturnSize = true;
estimatedReturnSize = 0;
break;
}
else
estimatedReturnSize += retType->decodingType()->calldataEncodedSize();
}
}
}