mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
ca3afea1d7
SourceUnit = Error $
Block = '{' Error '}'
ContractDefinition = '{' Error '}'
Statement = Error ';'
Co-Authored-By: chriseth <chris@ethereum.org>
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
/*
|
|
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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <liblangutil/Token.h>
|
|
#include <liblangutil/Scanner.h>
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
namespace langutil
|
|
{
|
|
|
|
class ErrorReporter;
|
|
class Scanner;
|
|
|
|
class ParserBase
|
|
{
|
|
public:
|
|
/// Set @a _parserErrorRecovery to true for additional error
|
|
/// recovery. This is experimental and intended for use
|
|
/// by front-end tools that need partial AST information even
|
|
/// when errors occur.
|
|
explicit ParserBase(ErrorReporter& errorReporter, bool _parserErrorRecovery = false): m_errorReporter(errorReporter)
|
|
{
|
|
m_parserErrorRecovery = _parserErrorRecovery;
|
|
}
|
|
|
|
std::shared_ptr<CharStream> source() const { return m_scanner->charStream(); }
|
|
|
|
protected:
|
|
/// Utility class that creates an error and throws an exception if the
|
|
/// recursion depth is too deep.
|
|
class RecursionGuard
|
|
{
|
|
public:
|
|
explicit RecursionGuard(ParserBase& _parser): m_parser(_parser)
|
|
{
|
|
m_parser.increaseRecursionDepth();
|
|
}
|
|
~RecursionGuard() { m_parser.decreaseRecursionDepth(); }
|
|
private:
|
|
ParserBase& m_parser;
|
|
};
|
|
|
|
/// Start position of the current token
|
|
int position() const;
|
|
/// End position of the current token
|
|
int endPosition() const;
|
|
|
|
///@{
|
|
///@name Helper functions
|
|
/// If current token value is not @a _value, throw exception otherwise advance token
|
|
// @a if _advance is true and error recovery is in effect.
|
|
void expectToken(Token _value, bool _advance = true);
|
|
|
|
/// Like expectToken but if there is an error ignores tokens until
|
|
/// the expected token or EOS is seen. If EOS is encountered, back up to the error point,
|
|
/// and throw an exception so that a higher grammar rule has an opportunity to recover.
|
|
void expectTokenOrConsumeUntil(Token _value, std::string const& _currentNodeName, bool _advance = true);
|
|
Token currentToken() const;
|
|
Token peekNextToken() const;
|
|
std::string tokenName(Token _token);
|
|
std::string currentLiteral() const;
|
|
Token advance();
|
|
///@}
|
|
|
|
/// Increases the recursion depth and throws an exception if it is too deep.
|
|
void increaseRecursionDepth();
|
|
void decreaseRecursionDepth();
|
|
|
|
/// Creates a @ref ParserError and annotates it with the current position and the
|
|
/// given @a _description.
|
|
void parserError(std::string const& _description);
|
|
void parserError(SourceLocation const& _location, std::string const& _description);
|
|
|
|
/// Creates a @ref ParserWarning and annotates it with the current position and the
|
|
/// given @a _description.
|
|
void parserWarning(std::string const& _description);
|
|
|
|
/// Creates a @ref ParserError and annotates it with the current position and the
|
|
/// given @a _description. Throws the FatalError.
|
|
void fatalParserError(std::string const& _description);
|
|
void fatalParserError(SourceLocation const& _location, std::string const& _description);
|
|
|
|
std::shared_ptr<Scanner> m_scanner;
|
|
/// The reference to the list of errors and warning to add errors/warnings during parsing
|
|
ErrorReporter& m_errorReporter;
|
|
/// Current recursion depth during parsing.
|
|
size_t m_recursionDepth = 0;
|
|
/// True if we are in parser error recovery. Usually this means we are scanning for
|
|
/// a synchronization token like ';', or '}'. We use this to reduce cascaded error messages.
|
|
bool m_inParserRecovery = false;
|
|
bool m_parserErrorRecovery = false;
|
|
};
|
|
|
|
}
|