solidity/libsolidity/codegen/MultiUseYulFunctionCollector.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
/**
* Container of (unparsed) Yul functions identified by name which are meant to be generated
* only once.
*/
#include <libsolidity/codegen/MultiUseYulFunctionCollector.h>
#include <liblangutil/Exceptions.h>
#include <libsolutil/Whiskers.h>
#include <libsolutil/StringUtils.h>
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using namespace solidity;
using namespace solidity::frontend;
using namespace solidity::util;
std::string MultiUseYulFunctionCollector::requestedFunctions()
{
std::string result = std::move(m_code);
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m_code.clear();
m_requestedFunctions.clear();
return result;
}
std::string MultiUseYulFunctionCollector::createFunction(std::string const& _name, std::function<std::string()> const& _creator)
{
if (!m_requestedFunctions.count(_name))
{
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m_requestedFunctions.insert(_name);
std::string fun = _creator();
solAssert(!fun.empty(), "");
solAssert(fun.find("function " + _name + "(") != std::string::npos, "Function not properly named.");
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m_code += std::move(fun);
}
return _name;
}
std::string MultiUseYulFunctionCollector::createFunction(
std::string const& _name,
std::function<std::string(std::vector<std::string>&, std::vector<std::string>&)> const& _creator
)
{
solAssert(!_name.empty(), "");
if (!m_requestedFunctions.count(_name))
{
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m_requestedFunctions.insert(_name);
std::vector<std::string> arguments;
std::vector<std::string> returnParameters;
std::string body = _creator(arguments, returnParameters);
solAssert(!body.empty(), "");
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m_code += Whiskers(R"(
function <functionName>(<args>)<?+retParams> -> <retParams></+retParams> {
<body>
}
)")
("functionName", _name)
("args", joinHumanReadable(arguments))
("retParams", joinHumanReadable(returnParameters))
("body", body)
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.render();
}
return _name;
}