Guys I have a question. I'm using sablecc 3.2. I was wondering something.
I've extended the lexer to print tokens. This is a typical output:
TId, state : 0, text : [font]
TLPar, state : 0, text : [(]
TBlank, state : 0, text : [ ]
TId, state : 0, text : [arial]
TComma, state : 0, text : [,]
TBlank, state : 0, text : [ ]
TId, state : 0, text : [bold]
TComma, state : 0, text : [,]
TBlank, state : 0, text : [ ]
TNumber, state : 0, text : [20]
TRPar, state : 0, text : [)]
TBlank, state : 0, text : [ ]
TLPar, state : 0, text : [(]
TBlank, state : 0, text : [ ]
TLPar, state : 0, text : [(]
TElement, state : 0, text : [v]
TDot, state : 0, text : [.]
TId, state : 0, text : [degree]
TBlank, state : 0, text : [ ]
TCop, state : 0, text : [>=]
TBlank, state : 0, text : [ ]
TNumber, state : 0, text : [3]
TBlank, state : 0, text : [ ]
TRPar, state : 0, text : [)]
TBlank, state : 0, text : [ ]
TLogicAnd, state : 0, text : [AND]
TBlank, state : 0, text : [ ]
TLogicNot, state : 0, text : [NOT]
TBlank, state : 0, text : [ ]
TElement, state : 0, text : [v]
TDot, state : 0, text : [.]
TId, state : 0, text : [label]
TBlank, state : 0, text : [ ]
TCop, state : 0, text : [==]
TBlank, state : 0, text : [ ]
TString, state : 0, text : ["Roma"]
TBlank, state : 0, text : [ ]
TRPar, state : 0, text : [)]
TBlank, state : 0, text : [ ]
TRPar, state : 0, text : [)]
Parser Exception
[1,71] expecting: EOF
As you can see the lexer prints every token and then, since there is
something that shouldn't be there, the parser generate an Exception, the
last line is a e.getMessage(). So far that's ok. But...since the
e.getMessage() is pretty specific I would guess that there's already a
partial AST. Is thare some way I could explore that partial AST with the
DepthFirstAdapter? Basically this is a part of the specific grammar:
par =
{numero} number |
{stringa} string |
{idpar} id ;
What I want to know is if is possible to know already if that TId or TNumber
are already parameters even if the AST is not complete.
--
Distinti Saluti
Emanuele Ianni
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