[antlr-interest] 'Expression Evaluator Tutorial' not working

[Philip Mötteli]

Hi,


I'm a complete newbie to ANTLR and so I thought to start with the  
simple 'Expression Evaluator Tutorial'. I downloaded the most recent  
version of ANTLRworks, pasted the grammar into the editor, picked  
'prog', entered '2+3*4' and pressed start. Instead of building the  
parse tree, ANTLRworks just says: "The interpreter does not run  
actions nor evaluate syntactic predicates. Use the debugger if you  
want to use these ANTLR features." Apart from the fact, that I wonder  
what the interpreter then would like to do, I can't enter anything in  
the debugger. The panes don't accept input.

Can anybody explain a newbie what he should do?


Thanks
Phil