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FakeLuaLexer.h
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FakeLuaLexer.h
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/*
* Copyright (C) 2019 Me and My Shadow
*
* This file is part of Me and My Shadow.
*
* Me and My Shadow 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.
*
* Me and My Shadow 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 Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FAKELUALEXER_H
#define FAKELUALEXER_H
#include "ITreeStorage.h"
#include <string>
// A simple and fake Lua lexer.
class FakeLuaLexer {
public:
enum TokenType {
EndOfFile,
Identifier,
Operator,
StringLiteral,
NumberLiteral,
Comment,
};
const char* buf; // The input buffer, will be advanced after get next token
ITreeStorageBuilder::FilePosition posStart; // The start position of the token
ITreeStorageBuilder::FilePosition pos; // The position, will be advanced after get next token (usually the end position of the token)
TokenType tokenType; // The token type
std::string token; // The (unescaped) string containing the contents of the token
std::string error; // The error message if it is not empty.
bool storedByPOASerializer; // True if it's a string stored in a file generated by POASerializer.
FakeLuaLexer();
// Get next token, returns true if it succeded, false if it's EOF or an error occured.
bool getNextToken();
private:
bool parseNumber();
bool parseShortString(char delim);
bool parseLongString(int level);
bool parseComment();
int checkOpeningLongBracket(int offset = 0);
int checkClosingLongBracket(int offset = 0);
int checkDigit(bool isHex, int offset = 0);
void advanceByCharacter(char c);
};
#endif

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