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From: kenneth@EB.se (Kenneth Persson)
Newsgroups: comp.sys.next
Subject: Re: methods with arbitrary # of args? How?
Keywords: varargs
Message-ID: <kenneth.656340390@exklusiv>
Date: 19 Oct 90 12:46:30 GMT
References: <3860@network.ucsd.edu>
Sender: news@EB.se (EB Signal News server)
Organization: EB Signal AB, Stockholm, Sweden
Lines: 43

Look for the file mivarargs.h and for examples
look at the |error:| method in the class Object:

//
//  Generate an error diagnostic using aCStr in the style of  printf
//  followed by a variable number of argument, e.g.:
//
//      return [self error:"index %d exceeds limit %d", index, limit];
//
- error: (STR) aCStr, ...
{
        va_list ap;
        va_start(ap);
        return (*_error)(self, aCStr, ap);
        va_end(ap);
}

or at the |sprintf:| method in the class String:

//
//      Create a new instance and assign string
//      from the format and args.
//
+ sprintf:(STR)fmt, ...
{
    char buf[BUFSIZ];
    va_list ap;
    va_start(ap);
    vsprintf(buf, fmt, ap);
    va_end(ap);
    return [self str: buf];
}

p.s Can somebody out there reply to me if this message has reached you?
    I'm not sure our postings are spread.



--
      +-------------------------+--------------------------+
      |  Kenneth Persson        |  email: kenneth@eb.se    |
      |  EB Signal AB, Sweden   |  voice: +46 8 726 2267   |
      +-------------------------+--------------------------+