mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
d67322a186
Also:
- Use {}-style list initialisation for SourceLocation construction
- Introduce new system includes
- Changes the API of the Scanner to take source as value (with move) as opposed to as a reference
98 lines
3.4 KiB
C++
98 lines
3.4 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/>.
|
|
|
|
This file is derived from the file "scanner.h", which was part of the
|
|
V8 project. The original copyright header follows:
|
|
|
|
Copyright 2006-2012, the V8 project authors. All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above
|
|
copyright notice, this list of conditions and the following
|
|
disclaimer in the documentation and/or other materials provided
|
|
with the distribution.
|
|
* Neither the name of Google Inc. nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/**
|
|
* @author Christian <c@ethdev.com>
|
|
* @date 2014
|
|
* Solidity scanner.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <string>
|
|
#include <tuple>
|
|
|
|
namespace langutil
|
|
{
|
|
|
|
/**
|
|
* Bidirectional stream of characters.
|
|
*
|
|
* This CharStream is used by lexical analyzers as the source.
|
|
*/
|
|
class CharStream
|
|
{
|
|
public:
|
|
CharStream(): m_position(0) {}
|
|
explicit CharStream(std::string const& _source): m_source(_source), m_position(0) {}
|
|
|
|
int position() const { return m_position; }
|
|
bool isPastEndOfInput(size_t _charsForward = 0) const { return (m_position + _charsForward) >= m_source.size(); }
|
|
|
|
char get(size_t _charsForward = 0) const { return m_source[m_position + _charsForward]; }
|
|
char advanceAndGet(size_t _chars = 1);
|
|
char rollback(size_t _amount);
|
|
|
|
void reset() { m_position = 0; }
|
|
|
|
std::string const& source() const { return m_source; }
|
|
|
|
///@{
|
|
///@name Error printing helper functions
|
|
/// Functions that help pretty-printing parse errors
|
|
/// Do only use in error cases, they are quite expensive.
|
|
std::string lineAtPosition(int _position) const;
|
|
std::tuple<int, int> translatePositionToLineColumn(int _position) const;
|
|
///@}
|
|
|
|
private:
|
|
std::string m_source;
|
|
size_t m_position;
|
|
};
|
|
|
|
}
|