(flex.info)ERASEME57

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ERASEME57
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     To: "Marty Leisner" <leisner@sdsp.mc.xerox.com>
     Subject: Re: flex limitations
     In-reply-to: Your message of Sat, 06 Sep 1997 11:27:21 PDT.
     Date: Mon, 08 Sep 1997 11:38:08 PDT
     From: Vern Paxson <vern>
     
     > %%
     > [a-zA-Z]+       /* skip a line */
     >                 {  printf("got %s\n", yytext); }
     > %%
     
     What version of flex are you using?  If I feed this to 2.5.4, it complains:
     
     	"bug.l", line 5: EOF encountered inside an action
     	"bug.l", line 5: unrecognized rule
     	"bug.l", line 5: fatal parse error
     
     Not the world's greatest error message, but it manages to flag the problem.
     
     (With the introduction of start condition scopes, flex can't accommodate
     an action on a separate line, since it's ambiguous with an indented rule.)
     
     You can get 2.5.4 from ftp.ee.lbl.gov.
     
     		Vern