[antlr-interest] Resolving ambiguity

[Gavin Lambert]

At 07:07 5/05/2007, Stefan wrote:
 >OK, but how do I do it without changing the grammar? How do I 
make
 >ANTLR choose the 4th alternative instead of the 2nd, when 
IDENTIFIER
 >is a variable?

You need to use a semantic predicate.  Something along these 
lines:

statement
     :
     (   function_definition
     |   {isFunction(LT(1))}? function_call
     |   variable_definition
     |   expression
     ) ';';

(The exact syntax used to call LT may be different depending on 
your target language.  But it'll be something along those 
lines.  There's probably more info on the wiki.)