[antlr-interest] Simple grammar with error

[Gavin Lambert]

At 20:59 16/09/2007, Alfonso wrote:
 >Thanks Gavin, your explanation is clear. However, given that the 

 >debugger seems to accept and parse this correctly and the
 >interpreter does not, I'm not sure of which one of the two has a 
bug.

That would be strange.  However this problem case will only occur 
if you have parentheses in your expression -- were you passing 
each one the same input?