Path: utzoo!attcan!uunet!snorkelwacker!apple!agate!shelby!neon!michaelg
From: michaelg@Neon.Stanford.EDU (Michael Greenwald)
Newsgroups: comp.lang.lisp
Subject: Re: Building a string, character-by-character (HELP!)
Message-ID: <1990Oct1.124048.24238@Neon.Stanford.EDU>
Date: 1 Oct 90 12:40:48 GMT
References: <51703@brunix.UUCP>
Organization: Computer Science Department, Stanford University
Lines: 18

dkb@cs.brown.edu (Dilip Barman) writes:


>I'm writing a lexical analyzer in Common LISP and am having problems
>in dealing with characters.  I am using the read-char built-in 
>function to read from a file stream in a "standard" way to ignore
>white space and fold to upper case alphabetic characters.  However,
>I find no way to deal with string concatenation - i.e., how do I 
>keep tacking on filtered characters to a nascent output string?
>The cons primitive will build a list structure and seems to be
>irrelevant to what I'm trying to do.  Any suggestions????

Would VECTOR-PUSH or VECTOR-PUSH-EXTEND be what you are looking for?

>Dilip Barman     dkb@cs.brown.edu
>U.S. mail: Brown University                       Home: 40 Everett Avenue
>           Dept. of Computer Science, Box 1910          Providence, RI 02906
>           Providence, RI 02912 (401)863-7666           (401)521-9731