122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
// scanner.h
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//
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// Copyright (C) 2002, Chris Laurel <claurel@shatters.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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#ifndef CELSCRIPT_SCANNER_H_
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#define CELSCRIPT_SCANNER_H_
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#include <celscript/celx.h>
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#include <string>
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#include <iostream>
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namespace celx
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{
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class Scanner
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{
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public:
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enum TokenType
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{
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TokenName = 0,
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TokenString = 1,
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TokenNumber = 2,
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TokenBegin = 3,
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TokenEnd = 4,
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TokenNull = 5,
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TokenBeginGroup = 6,
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TokenEndGroup = 7,
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TokenBeginArray = 8,
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TokenEndArray = 9,
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TokenEqual = 10,
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TokenNotEqual = 11,
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TokenBar = 12,
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TokenOpen = 13,
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TokenClose = 14,
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TokenPlus = 15,
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TokenMinus = 16,
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TokenMultiply = 17,
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TokenDivide = 18,
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TokenEndStatement = 19,
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TokenAssign = 20,
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TokenGreater = 21,
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TokenLesser = 22,
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TokenGreaterEqual = 23,
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TokenLesserEqual = 24,
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TokenNot = 25,
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TokenComma = 26,
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KeywordIf = 50,
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KeywordElse = 51,
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KeywordFor = 52,
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KeywordWhile = 53,
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KeywordTrue = 54,
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KeywordFalse = 55,
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KeywordNull = 56,
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KeywordVar = 57,
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KeywordReturn = 58,
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KeywordFunction = 59,
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KeywordLambda = 60,
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TokenError = 255,
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};
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Scanner(std::istream*);
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TokenType nextToken();
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TokenType getTokenType();
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void pushBack();
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double getNumberValue();
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std::string getNameValue();
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std::string getStringValue();
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int getLineNumber();
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private:
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enum State
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{
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StartState = 0,
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NameState = 1,
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NumberState = 2,
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FractionState = 3,
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ExponentState = 4,
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ExponentFirstState = 5,
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DotState = 6,
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CommentState = 7,
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StringState = 8,
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ErrorState = 9,
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StringEscapeState = 10,
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MinusState = 11,
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PlusState = 12,
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EqualState = 13,
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AsteriskState = 14,
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SlashState = 15,
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LessState = 16,
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GreaterState = 17,
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BangState = 18,
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};
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std::istream* in;
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int nextChar;
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TokenType tokenType;
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bool haveValidNumber;
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bool haveValidName;
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bool haveValidString;
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bool pushedBack;
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int readChar();
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void syntaxError(char*);
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double numberValue;
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std::string textToken;
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};
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} // namespace celx
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#endif // _SCANNER_H_
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