[gcjx] Generalise visitor

[Ranjit Mathew]

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Ranjit Mathew wrote:
> Hi,
> 
>   I wanted to implement an equivalent of debug_tree() for GCJX, but
> found that the current visitor does not accept all model element
> tree nodes. The attached patche make model_element provide a
> visit() method and extends visitor to accept a few more classes.

Ugh! I meant "The attached patch makes...".

"dump.cc" provides a single "dump_method()" method and a helper
class that implements the visitor interface over the model
elements. However, it is inconvenient to fetch a model_method *
every time you want to examine a portion of the AST and the
output would be unwieldy in some cases too.

My plan is to replace dump_method() with a more general
dump_tree(), but that means model_element being able to accept
a visitor and the visitor interface providing for a method
for a model_element, etc. Hence the need for this patch
before I can implement dump_tree().

Ranjit.

- --
Ranjit Mathew       Email: rmathew AT gmail DOT com

Bangalore, INDIA.     Web: http://ranjitmathew.hostingzero.com/




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