[antlr-interest] ANTLRWorks interpreter question

[VAUCHER Laurent]

  Hi and a big thank you for ANTLRWorks. It would make a great Eclipse
plug-in, but it is already very useful as a standalone tool.

  I just wondered if the interpreter is 'guaranteed' to run exactly as
the final generated code.

  I don't use semantic predicates, only syntactic ones, and the
interpreter chokes on inputs that the 'debugger' swallows easily.

  I use v1.0b5 and the interpreter gives me errors like
'FailedPredicateException'.

  Here is a sample grammar file that exhibits the problem when trying to
parse "a.b" as a table_spec.


------------------------------------------------------------------------
--
grammar testInterpreter;

table_spec
  : ( schema_name DOT ) => schema_name DOT table_name 
  | table_name
  ;

schema_name :	IDENTIFIER ;

table_name : IDENTIFIER ;

DOT :	'.' ;
ASTERISK : '*' ;
IDENTIFIER : LETTER+ ;
LETTER : 'a'..'z' | 'A'..'Z' ;
------------------------------------------------------------------------
--

Laurent.