[antlr-interest] Duplicate nodes on a parse tree?

[Jean Bovet]

No, there is no javadoc although you can generate one from the source  
code if you want but there is not much comments currently. Can you  
send me a screenshot of what you are seeing? The ANTLR book is  
talking about the backtracking and showing some illustrations.

Jean

On Mar 2, 2007, at 9:49 AM, Vadim Tropashko wrote:

> OK, I see the coloring (when tree is in chart form).
> It must be the Tree.getType() method that does this.
> Is there javadoc html page anywhere?
>
>
> --- Jean Bovet <antlr-list at arizona-software.ch> wrote:
>
>> This can be part of the backtracking, yes. Are the
>> duplicate nodes
>> colored in green or red?
>>
>> Jean
>>
>> On Mar 1, 2007, at 10:16 AM, Vadim Tropashko wrote:
>>
>>> Here is another way to approach the problem. When
>>> running the antlrworks interpreter, the parse tree
>>> don't have any duplicates. How does the
>> interpreter
>>> constructs the tree?
>>>
>>>
>>> --- Vadim Tropashko <vadimtro at yahoo.com> wrote:
>>>
>>>> I'm leveraging debugger parse tree generation as
>>>> described in
>>>>
>>>
>>
> http://www.antlr.org/wiki/pages/viewpage.action?pageId=1760
>>>>
>>>> Everything works as advertised, although I'm
>> getting
>>>> duplicate nodes. For example given the rule:
>>>>
>>>> boolean_primary options { backtrack=true; }
>>>> :         sim_expr
>>>> |
>>>>  member_predicate
>>>> |                          comparison_predicate
>>>> ;
>>>>
>>>> I'm getting the tree branch like this
>>>>
>>>> boolean_primary
>>>>     sim_expr
>>>>         ....
>>>>     sim_expr
>>>>         ....
>>>>
>>>> Is the duplicate "sim_expr" branch occurrence due
>> to
>>>> backtracking?  Then what would be the right way
>> to
>>>> filter out those ghost nodes?
>>>>
>>>>
>>>>
>>>>
>>>
>>
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