| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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| 2 | * Copyright (C) 2000 Gerwin Klein <[email protected]> *
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| 3 | * All rights reserved. *
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| 4 | * *
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| 5 | * Thanks to Larry Bell and Bob Jamison for suggestions and comments. *
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| 6 | * *
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| 7 | * This program is free software; you can redistribute it and/or modify *
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| 8 | * it under the terms of the GNU General Public License. See the file *
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| 9 | * COPYRIGHT for more information. *
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| 10 | * *
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| 11 | * This program is distributed in the hope that it will be useful, *
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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| 14 | * GNU General Public License for more details. *
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| 15 | * *
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| 16 | * You should have received a copy of the GNU General Public License along *
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| 17 | * with this program; if not, write to the Free Software Foundation, Inc., *
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| 18 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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| 19 | * *
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| 20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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| 21 |
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| 22 | %%
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| 23 |
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| 24 | %byaccj
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| 25 |
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| 26 | %{
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| 27 | private Parser yyparser;
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| 28 |
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| 29 | public Yylex(java.io.Reader r, Parser yyparser) {
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| 30 | this(r);
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| 31 | this.yyparser = yyparser;
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| 32 | }
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| 33 | %}
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| 34 |
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| 35 | NUM = [0-9]+ ("." [0-9]+)?
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| 36 | NL = \n | \r | \r\n
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| 37 |
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| 38 | %%
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| 39 |
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| 40 | /* operators */
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| 41 | "+" |
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| 42 | "-" |
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| 43 | "*" |
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| 44 | "/" |
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| 45 | "^" |
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| 46 | "(" |
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| 47 | ")" { return (int) yycharat(0); }
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| 48 |
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| 49 | /* newline */
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| 50 | {NL} { return Parser.NL; }
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| 51 |
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| 52 | /* float */
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| 53 | {NUM} { yyparser.yylval = new ParserVal(Double.parseDouble(yytext()));
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| 54 | return Parser.NUM; }
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| 55 |
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| 56 | /* whitespace */
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| 57 | [ \t]+ { }
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| 58 |
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| 59 | \b { System.err.println("Sorry, backspace doesn't work"); }
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| 60 |
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| 61 | /* error fallback */
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| 62 | [^] { System.err.println("Error: unexpected character '"+yytext()+"'"); return -1; }
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