[antlr-interest] gunit with custom AST nodes throws InvocationTargetException
Leon Su
leon.antlr at mac.com
Fri Mar 28 12:00:50 PDT 2008
Hi Felix,
Thanks for addressing this issue. The current version of junit
translator doesn't support custom adaptor.
For adding a custom adaptor to it, you could manually add the 2
statements to the method "execParser" right
after creating a parser:
XXXParser parser = new XXXParser(tokens) // gunit gererates this
for you
XXXAdaptor adaptor = new XXXAdaptor();
parser.setTreeAdaptor(adaptor); // use custom adaptor
I'm going to release a newer version of gunit with some bugs fixed
nowadays, and I may fix this either in this
release or the next. I am also thinking to add an option in gunit for
using a custom adaptor.
Leon
On Mar 28, 2008, at 6:03 AM, Felix Dorner wrote:
> Ok,
>
> lot of things to learn. The gUnit creates a Parser instance and
> obviously does not set its TreeAdaptor to my ASTAdaptor, therefore
> the Parser creates CommonTree nodes. Then, some questions arise:
>
> As I learned from the Book, I set the parser's TreeAdaptor from
> _outside_ the parser. I don't see a simple way to implicitly set
> the Adaptor from _within_ the parser, when using the default
> constructor (which gUnit does). Is there a reason why there's
> nothing like, e.g. a parser option "Adapter" or so?
>
> So either gUnit would provide an option to set the desired Adaptor,
> or I find a way to implicitly set the Adaptor from within the grammar.
>
> Thanks for your comments,
> Felix
>
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