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welworx
Joined: 13 Jun 2010
Posts: 2
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 Posted: Mon Sep 20, 2010 2:09 pm Post subject: ANTLR - Problem - Mygrammar.g contains grammar Expr; names must be identical |
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Hi guys!
I'm trying to develop a modul for latex support with syntax highlighting.
I worked through this tutorial http://wiki.netbeans.org/AntlrInNetBeansJavaApplication
but i always get this message:
error( : file C:\NetBeansProjects\antlr\src\antlr\Mygrammar.g contains grammar Expr; names must be identical
Java Result: 1
This is my Mygrammar.g file:
| Code: |
grammar Expr;
@header {
package antlr;
import java.util.HashMap;
}
@lexer::header{
package antlr;
}
@members {
/** Map variable name to Integer object holding value */
HashMap memory = new HashMap();
}
prog: stat+ ;
stat: expr NEWLINE {System.out.println($expr.value);}
| ID '=' expr NEWLINE
{memory.put($ID.text, new Integer($expr.value));}
| NEWLINE
;
expr returns [int value]
: e=multExpr {$value = $e.value;}
( '+' e=multExpr {$value += $e.value;}
| '-' e=multExpr {$value -= $e.value;}
)*
;
multExpr returns [int value]
: e=atom {$value = $e.value;} ('*' e=atom {$value *= $e.value;})*
;
atom returns [int value]
: INT {$value = Integer.parseInt($INT.text);}
| ID
{
Integer v = (Integer)memory.get($ID.text);
if ( v!=null ) $value = v.intValue();
else System.err.println("undefined variable "+$ID.text);
}
| '(' expr ')' {$value = $expr.value;}
;
ID : ('a'..'z'|'A'..'Z')+ ;
INT : '0'..'9'+ ;
NEWLINE:'\r'? '\n' ;
WS : (' '|'\t')+ {skip();} ;
|
I have also got the problem, that there is neither a
MyGrammarLexer.java nor a MyGrammarParser.java file generated.
Any idea?
Thanks
- welworx
PS: Netbeans 6.9, windows 7 |
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dzsystem
Joined: 15 Jan 2011
Posts: 2
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| Posted: Sat Jan 15, 2011 11:43 pm Post subject: |
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u must to rename the name of grammare to
grammar MyGrammar;
in grammar file
good luk   |
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benhuan
Joined: 27 Dec 2012
Posts: 1
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| Posted: Thu Dec 27, 2012 3:01 am Post subject: |
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| dzsystem wrote: | u must to rename the name of grammare to
grammar MyGrammar;
in grammar file
good luk |
Thank you so much |
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