[antlr-interest] Ultimately Frustrated

[Raymond J. Schneider]

Doesn't work: (I've tried that! although it seems to reduce the number of errors.  I included the folder's directory if that helps at all)
 Directory of I:\E

02/13/2009  09:55 PM    <DIR>          .
02/13/2009  09:55 PM    <DIR>          ..
01/28/2009  01:38 PM         2,239,854 antlrworks-1.2.2.jar
02/13/2009  09:41 PM             1,164 Expr.g
10/28/2008  05:08 PM           116,205 antlr-3.1.1-runtime.jar
02/13/2009  10:46 PM            13,618 ExprParser.java
02/13/2009  10:46 PM               132 Expr.tokens
02/13/2009  10:46 PM            13,082 ExprLexer.java
02/13/2009  10:55 PM               382 Test.java
               7 File(s)      2,384,437 bytes
               2 Dir(s)   3,649,765,376 bytes free

I:\E>javac -classpath .;antlrworks-1.2.2.jar Test.java ExprLexer.java ExprParser
.java
.\ExprLexer.java:9: duplicate class: test.ExprLexer
public class ExprLexer extends Lexer {
       ^
Test.java:6: cannot access ExprLexer
bad class file: .\ExprLexer.java
file does not contain class ExprLexer
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
        ExprLexer lexer = new ExprLexer(input);
        ^
2 errors
--
Ray Schneider,PE, Ph.D
Associate Professor
Math and Computer Science
Bridgewater College
http://www.bridgewater.edu/~rschneid/
http://theweedlessgarden.blogspot.com
________________________________________
From: Robert Soule [robert.soule at gmail.com]
Sent: Friday, February 13, 2009 23:22
To: Raymond J. Schneider
Cc: antlr-interest at antlr.org
Subject: Re: [antlr-interest] Ultimately Frustrated

Hi Raymond,

Try adding "." to your classpath, to include the current directory.

javac -classpath .:antlrworks-1.2.2.jar Test.java ExprLexer.java ExprParser.java

-Robert

On Fri, Feb 13, 2009 at 11:10 PM, Raymond J. Schneider
<rschneid at bridgewater.edu> wrote:
> I'm really frustrated with what must be a trivial problem but I seem to be chasing my tail.
> To try to isolate things I put the antlrworks-1.2.2.jar file in a folder with Expr.g
> I ran:> java -cp antlrworks-1.2.2.jar org.antlr.Tool Expr.g
> That generated ExprLexer.java, ExprParser.java, and Expr.tokens
> So I added to the directory the Test Harness Test.java with the code:
>
> ---
> import org.antlr.runtime.*;
>
> public class Test {
>    public static void main(String[] args) throws Exception {
>        ANTLRInputStream input = new ANTLRInputStream(System.in);
>        ExprLexer lexer = new ExprLexer(input);
>        CommonTokenStream tokens = new CommonTokenStream(lexer);
>        ExprParser parser = new ExprParser(tokens);
>        parser.prog();
>    }
> }
> ---
> Then I tried to compile it with:
>>javac -cp antlrworks-1.2.2.jar Test.java ExprLexer.java ExprParser.java
>
> All the documentation seems to indicate this should work but what I get is:
> I:\E>javac -classpath antlrworks-1.2.2.jar Test.java ExprLexer.java ExprParser.java
> Test.java:6: cannot find symbol
> symbol  : class ExprLexer
> location: class Test
>        ExprLexer lexer = new ExprLexer(input);
>        ^
> Test.java:6: cannot find symbol
> symbol  : class ExprLexer
> location: class Test
>        ExprLexer lexer = new ExprLexer(input);
>                              ^
> Test.java:8: cannot find symbol
> symbol  : class ExprParser
> location: class Test
>        ExprParser parser = new ExprParser(tokens);
>        ^
> Test.java:8: cannot find symbol
> symbol  : class ExprParser
> location: class Test
>        ExprParser parser = new ExprParser(tokens);
>                                ^
> Note: ExprParser.java uses unchecked or unsafe operations.
> Note: Recompile with -Xlint:unchecked for details.
> 4 errors
>
> All the .java files are in the same directory
> Probably some old hand can look at this as identify my error, but I certainly can't seem to.
> I'd appreciate any help.
> I can run Expr.g in ANTLRWorks directly but not from the command line.
>
> Regards, Ray
> --
> Ray Schneider,PE, Ph.D
> Associate Professor
> Math and Computer Science
> Bridgewater College
> http://www.bridgewater.edu/~rschneid/
> http://theweedlessgarden.blogspot.com
>
>
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