| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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| 2 | * Copyright (C) 2001 Gerwin Klein <[email protected]> *
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| 3 | * Copyright (C) 2001 Bernhard Rumpe <[email protected]> *
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| 4 | * All rights reserved. *
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| 5 | * *
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| 6 | * This program is free software; you can redistribute it and/or modify *
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| 7 | * it under the terms of the GNU General Public License. See the file *
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| 8 | * COPYRIGHT for more information. *
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| 9 | * *
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| 10 | * This program is distributed in the hope that it will be useful, *
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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| 13 | * GNU General Public License for more details. *
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| 14 | * *
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| 15 | * You should have received a copy of the GNU General Public License along *
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| 16 | * with this program; if not, write to the Free Software Foundation, Inc., *
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| 17 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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| 18 | * *
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| 19 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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| 20 |
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| 21 |
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| 22 | import java_cup.runtime.Symbol;
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| 23 |
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| 24 | %%
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| 25 |
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| 26 | %cup
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| 27 | %implements sym
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| 28 |
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| 29 | %{
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| 30 | SymTab symtab; // externe symbol table
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| 31 |
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| 32 | public void setSymtab(SymTab symtab) {
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| 33 | this.symtab = symtab;
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| 34 | }
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| 35 |
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| 36 | private Symbol sym(int sym) {
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| 37 | return new Symbol(sym);
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| 38 | }
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| 39 |
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| 40 | private Symbol sym(int sym, Object val) {
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| 41 | return new Symbol(sym, val);
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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 | "arguments" { return sym(ARGUMENTS); }
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| 48 | "input" { return sym(INPUT); }
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| 49 | "functions" { return sym(FUNCTIONS); }
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| 50 | "output" { return sym(OUTPUT); }
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| 51 | "end" { return sym(END); }
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| 52 | "if" { return sym(IF); }
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| 53 | "then" { return sym(THEN); }
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| 54 | "else" { return sym(ELSE); }
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| 55 | "fi" { return sym(FI); }
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| 56 | [a-z]+ { symtab.enter(yytext(),new SymtabEntry(yytext()));
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| 57 | return sym(ID,yytext()); }
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| 58 | [0-9]+ { return sym(NUMBER,yytext()); }
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| 59 | "," { return sym(COMMA); }
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| 60 | "(" { return sym(LPAR); }
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| 61 | ")" { return sym(RPAR); }
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| 62 | "=" { return sym(EQ); }
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| 63 | "-" { return sym(MINUS); }
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| 64 | "+" { return sym(PLUS); }
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| 65 | "*" { return sym(TIMES); }
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| 66 | "/" { return sym(DIV); }
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| 67 | "<" { return sym(LE); }
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| 68 | "<=" { return sym(LEQ); }
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| 69 | [\ \t\b\f\r\n]+ { /* eat whitespace */ }
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| 70 | "//"[^\n]* { /* one-line comment */ }
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| 71 | . { throw new Error("Unexpected character ["+yytext()+"]"); }
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