Re: [Boost-users] [Spirit] seeking help with AST tree generation

13 Jun 2009

      ...
Hello,
Using Boost Spirit, is it possible to write a grammar that, out of the 
box, generates the AST tree according to cases below:
Case 1:
=======
Input:
1 < 2 AND 3 < 4 OR 5 < 6
Resulting tree:
OR
        /    \
      AND     5 < 6
     /   \
1 < 2   3 < 4
Case 2:
=======
Input:
1 < 2 AND (3 < 4 OR 5 < 6)
Resulting tree:
AND
        /    \
    1 < 2     OR
             /   \
        3 < 4   5 < 6
In other words, I want to honor the parenthesis for expression grouping.
How would you recommend doing it?
Please refer to the spirit mailinglist:
Spirit General Mailing List 

Also you should take a look at the calc examples, also the AST XML generation is maybe valid for you.

regards,

Jens Weller
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