[antlr-interest] Problems with NoViableAltException on compile

Dave Brosius dbrosius at mebigfatguy.com
Sun Mar 11 09:57:37 PDT 2012


WOW *EMBARRASSED*

THANKS!!

:)


On 03/11/2012 12:40 PM, John B. Brodie wrote:
> Greetings!
>
> On 03/11/2012 12:34 PM, Dave Brosius wrote:
>> Greetings, i had a working antlr 3.4 grammer that i am trying to
>> embellish, and am getting the exception below.
>>
>> The grammer in question is kind of big so i pastebin'ed it here:
>> http://pastebin.com/CVhFCCtB
>>
>> The addition in question is just an alternative choice on line 614 of
>>
>>       |   PIXELAVERAGE '(' expr, ',' expr ',' expr ')'
> --------------------------------------^??
> looks like an extra comma here
>>           {
>>               mv.visitInsn(Opcodes.POP);                     //don't 
>> mind
>> this impl, it's just stubbed for now
>>               mv.visitInsn(Opcodes.POP);
>>               mv.visitInsn(Opcodes.POP);
>>               mv.visitInsn(Opcodes.DCONST_0);
>>           } ;
>>
>> which to me is very similar to other blocks that work just fine. Without
>> this section the code generates fine.
>>
>>        [exec] error(100): /home/dave/dev/pixelle/etc/Pixelle.g:614:30:
>> syntax error: antlr: NoViableAltException(62@[722:4: ( ( id ( ASSIGN |
>> PLUS_ASSIGN ) ( atom | block ) ) (sub= ebnfSuffix[root_0,false] )? | a=
>> atom (sub2= ebnfSuffix[$a.tree,false] )? | ebnf | FORCED_ACTION | ACTION
>> | p= SEMPRED ( IMPLIES )? | t3= tree_ )])
>>        [exec] error(100): /home/dave/dev/pixelle/etc/Pixelle.g:614:30:
>> syntax error: antlr: NoViableAltException(62@[722:4: ( ( id ( ASSIGN |
>> PLUS_ASSIGN ) ( atom | block ) ) (sub= ebnfSuffix[root_0,false] )? | a=
>> atom (sub2= ebnfSuffix[$a.tree,false] )? | ebnf | FORCED_ACTION | ACTION
>> | p= SEMPRED ( IMPLIES )? | t3= tree_ )])
>>        [exec] error(100): /home/dave/dev/pixelle/etc/Pixelle.g:0:1:
>> syntax error: assign.types: MismatchedTreeNodeException(0!=29)
>>        [exec] error(100): /home/dave/dev/pixelle/etc/Pixelle.g:0:: 
>> syntax
>> error: assign.types: NoViableAltException(3@[])
>>        [exec] error(100): /home/dave/dev/pixelle/etc/Pixelle.g:0:1:
>> syntax error: assign.types: MismatchedTreeNodeException(3!=28)
>>        [exec] error(10):  internal error:
>> /home/dave/dev/pixelle/etc/Pixelle.g : java.util.NoSuchElementException:
>> can't look backwards more than one token in this stream
>>
>>
>> Any idea what i'm doing wrong?
>>
>>
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>



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