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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/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2016
* Solidity parser shared functionality.
*/
#include <liblangutil/ParserBase.h>
#include <liblangutil/Scanner.h>
#include <liblangutil/ErrorReporter.h>
using namespace std;
using namespace langutil;
std::shared_ptr<string const> const& ParserBase::sourceName() const
{
return m_scanner->sourceName();
}
int ParserBase::position() const
{
return m_scanner->currentLocation().start;
}
int ParserBase::endPosition() const
{
return m_scanner->currentLocation().end;
}
Token ParserBase::currentToken() const
{
return m_scanner->currentToken();
}
Token ParserBase::peekNextToken() const
{
return m_scanner->peekNextToken();
}
std::string ParserBase::currentLiteral() const
{
return m_scanner->currentLiteral();
}
Token ParserBase::advance()
{
return m_scanner->next();
}
void ParserBase::expectToken(Token _value, bool _advance)
{
Token tok = m_scanner->currentToken();
if (tok != _value)
{
auto tokenName = [this](Token _token)
{
if (_token == Token::Identifier)
return string("identifier");
else if (_token == Token::EOS)
return string("end of source");
else if (TokenTraits::isReservedKeyword(_token))
return string("reserved keyword '") + TokenTraits::friendlyName(_token) + "'";
else if (TokenTraits::isElementaryTypeName(_token)) //for the sake of accuracy in reporting
{
ElementaryTypeNameToken elemTypeName = m_scanner->currentElementaryTypeNameToken();
return string("'") + elemTypeName.toString() + "'";
}
else
return string("'") + TokenTraits::friendlyName(_token) + "'";
};
fatalParserError(string("Expected ") + tokenName(_value) + string(" but got ") + tokenName(tok));
}
if (_advance)
m_scanner->next();
}
void ParserBase::increaseRecursionDepth()
{
m_recursionDepth++;
if (m_recursionDepth >= 2560)
fatalParserError("Maximum recursion depth reached during parsing.");
}
void ParserBase::decreaseRecursionDepth()
{
solAssert(m_recursionDepth > 0, "");
m_recursionDepth--;
}
void ParserBase::parserError(string const& _description)
{
m_errorReporter.parserError(SourceLocation(position(), endPosition(), sourceName()), _description);
}
void ParserBase::fatalParserError(string const& _description)
{
m_errorReporter.fatalParserError(SourceLocation(position(), endPosition(), sourceName()), _description);
}
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