[antlr-interest] NoViableAltException this time

[Bart Kiers]

On Thu, Mar 25, 2010 at 1:27 PM, Simon zack <simonzack at gmail.com> wrote:

> tried using namespace_specification to interpret the string, but the error
> still shows up
>
> I changed the code a little, but a new exception pops up
>
> this only works when I remove the exception_info, however adding it messes
> up things
>

Both your first grammar:

exception_info
  :  '.exception'
  ;

namespace_specification
  :  ns_id1 = IDENTIFIER '.'
  ;

IDENTIFIER
  :  LETTER (LETTER|'0'..'9')*
  ;

LETTER
  :  '$'
  |  'A'..'Z'
  |  'a'..'z'
  |  '_'
  ;


and your second grammar:

exception_info
  :  '.exception'
  ;

namespace_specification
  :  ns_id1 = IDENTIFIER ('.' ns_idx = IDENTIFIER)*
     //ns_id1 = IDENTIFIER ( '.' ns_idx = IDENTIFIER)*
  ;

IDENTIFIER
  :  LETTER (LETTER|'0'..'9')*
  ;

fragment LETTER
  :  '$'
  |  'A'..'Z'
  |  'a'..'z'
  |  '_'
  ;

interpret the string "hello.world" just fine. See the attached output of
ANTLRWorks v1.3.1.

Regards,

Bart.
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