[antlr-interest] 2.7.1 -> 2.7.2 gotcha's?

[Terence Parr]

On Tuesday, August 5, 2003, at 11:46 AM, kkvilekval wrote:

Excellent points!

can you describe in more detail how the trees are being improperly 
constructed?

Did you regenerate your .java files from the .g using 2.7.2 or just 
point at the new jar file?

Regards,
Terence

> I've had alot of trouble  going from 2.7.1 to 2.7.2
>
> I've found two problems
> 1.  The grammar file now must specify fully qualified
>     names for AST contruction
>     i.e.
>      Previously we have production rules
>     <AST=IdentifierAST>
>
>      We must now use
>      <AST=mokan.compiler.expr.IdentifierAST>
>
>      since the class value is passed as string to
>      the constructor function.
>
> 2.   AST nodes must have public constructors
>      otherwise the reflection contructor cannot
>      find it in the class file.
>
>       Make sure all your AST nodes have
>       i.e.
>       2.7.1
>       protected VarAST(final Token token)
>       2.7.2
>       public VarAST(final Token token)
>
>
> Finally, the tree seems to be constructed differently.
> A previously working translator now fails completely
> with type cast errors, during the tree-walk.
>
>
> Is there a document describing what has changed and
> how to fix these problems???
>
> Thx.
>
>
>
>
>
>
>
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>
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