Hello everybody,
I would like to receive an hint about reading parser stack.
Suppose my (fantasy) bison grammar is this:
%start A
A : B C D | B E D
B: ID
C: '*'
D: IDENTIFIER
E: '-'
where IDENTIFIER has been defined like [a-zA-Z0-9]+ using flex.
How can I print "the identifier was: %s" when C matches (but not when E does
it) without rewriting the grammar?
In particular, I need to know what I have to write in
C: '*' { printf("The identifier was: %s", ?????); }
Note that it isn't my very problem, but it's a model of this and so I'd like
a general answer. So I can't modify my grammar and I don't want to read only
the last token in parser, but sometimes I'm interested in reading the last n
tokens.
Thank you!
Mark Redd
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