[antlr-interest] Expr example in Wiki compile error Eclipse using ANTLRworks 1.0b8, ANTLR 3.0b5

[Foolish Ewe]

I've tried getting some my stuff working ANTLR source code into eclipse, by
adding the ANTLRworks 1.0b8 jar to my class path, and using ANTLRworks to 
generate
the Java source and compile it in the Eclipse framework.

The generated code had compiler errors, (as did my much larger example) for 
the following
ANTLR source line:
    |   '(' expr ')' {$value = $expr.value;}

The action $value=$expr.value; generates the following Java source (which 
does not compile):

                    value = $expr.value;

Which does not compile.

I've noticed in my own source that I've had to create attribute labels in 
order
to get compilable code out of ANTLR1.0b5 (via ANTRLworks 1.0b8),
so changing the ANTLR source to read:

    |   '(' myexpr=expr ')' {$value = $myexpr.value;}

generates the following Java source (which does compile):

                    value = myexpr;

Does anyone have any idea why the published example in the wiki isn't 
building
in this environment?

Regards:

Bill M.

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