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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 <libsolidity/parsing/ParserBase.h>
#include <libsolidity/parsing/Scanner.h>
using namespace std;
using namespace dev;
using namespace dev::solidity;
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;
}
void ParserBase::expectToken(Token::Value _value)
{
Token::Value tok = m_scanner->currentToken();
if (tok != _value)
{
if (Token::isReservedKeyword(tok))
{
fatalParserError(
string("Expected token ") +
string(Token::name(_value)) +
string(" got reserved keyword '") +
string(Token::name(tok)) +
string("'")
);
}
else if (Token::isElementaryTypeName(tok)) //for the sake of accuracy in reporting
{
ElementaryTypeNameToken elemTypeName = m_scanner->currentElementaryTypeNameToken();
fatalParserError(
string("Expected token ") +
string(Token::name(_value)) +
string(" got '") +
elemTypeName.toString() +
string("'")
);
}
else
fatalParserError(
string("Expected token ") +
string(Token::name(_value)) +
string(" got '") +
string(Token::name(m_scanner->currentToken())) +
string("'")
);
}
m_scanner->next();
}
Token::Value ParserBase::expectAssignmentOperator()
{
Token::Value op = m_scanner->currentToken();
if (!Token::isAssignmentOp(op))
{
if (Token::isElementaryTypeName(op)) //for the sake of accuracy in reporting
{
ElementaryTypeNameToken elemTypeName = m_scanner->currentElementaryTypeNameToken();
fatalParserError(
string("Expected assignment operator, got '") +
elemTypeName.toString() +
string("'")
);
}
else
fatalParserError(
string("Expected assignment operator, got '") +
string(Token::name(m_scanner->currentToken())) +
string("'")
);
}
m_scanner->next();
return op;
}
ASTPointer<ASTString> ParserBase::expectIdentifierToken()
{
Token::Value id = m_scanner->currentToken();
if (id != Token::Identifier)
{
if (Token::isElementaryTypeName(id)) //for the sake of accuracy in reporting
{
ElementaryTypeNameToken elemTypeName = m_scanner->currentElementaryTypeNameToken();
fatalParserError(
string("Expected identifier, got '") +
elemTypeName.toString() +
string("'")
);
}
else
fatalParserError(
string("Expected identifier, got '") +
string(Token::name(id)) +
string("'")
);
}
return getLiteralAndAdvance();
}
ASTPointer<ASTString> ParserBase::getLiteralAndAdvance()
{
ASTPointer<ASTString> identifier = make_shared<ASTString>(m_scanner->currentLiteral());
m_scanner->next();
return identifier;
}
void ParserBase::parserError(string const& _description)
{
auto err = make_shared<Error>(Error::Type::ParserError);
*err <<
errinfo_sourceLocation(SourceLocation(position(), position(), sourceName())) <<
errinfo_comment(_description);
m_errors.push_back(err);
}
void ParserBase::fatalParserError(string const& _description)
{
parserError(_description);
BOOST_THROW_EXCEPTION(FatalError());
}
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