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From: 820785gm@aucs.UUCP
Newsgroups: comp.lang.c
Subject: whats wrong with this lex grammer? (help)
Message-ID: <443@aucs.UUCP>
Date: Mon, 21-Sep-87 14:47:25 EDT
Article-I.D.: aucs.443
Posted: Mon Sep 21 14:47:25 1987
Date-Received: Tue, 22-Sep-87 01:10:17 EDT
Distribution: na
Organization: School of Computer Science, Acadia Univ., Nova Scotia
Lines: 40
Keywords: Didn't know where to post it


       Well, I wasn't sure where to post this, but I'm sure someone on
this group will know the answer. My question refers to  the regular
grammer of lex. For recognizing comments (ie (*...*) ) I have this
horrible long statement  that works. However, I have a much nicer one
that I don't uunderstand why it doesn't work.(Nobody here can seem to tell
me why either). Here is  the short lex program:


%%
"(*"([^*]|("*"/[^)]))*"*)"     printf("&%s&\n", yytext);


  but it doesn't work.  Would somebody mind explaining why ?

The part that really confuses me is shown in this run :


(*andrew*) macleod (*was*) here
&(*andrew*&
) macleod &(*was*&
) here


(**)kk
&(**&             it  recognizes the grammer here, but it doesn't
)kk               accept the last ')'.


(****)             Anyway, can anybody help me. I'm sure it  must be simple.
&(****&
)

(***)
*)                 Oh yeah, its under 4.3BSD.
&(***)
*&
)

                          Thanks a lot,       ANDROID.