🚀 go-pugleaf

I have submitted a cover sheet to the C9X people for a new feature of printf,
which would provide user-defined format specifiers, and similar "features".

I have the beginnings of a real implementation to play with, and I am looking
for beta testers.

The basic idea of the proposed feature is that users would be able to install
new formats; for instance, the user would
do something like
	int bangcvt(va_list *ap, char *s, int len, fmtspec *f) {
		strncpy(s, strerror(errno), len);
		s[len - 1] = '\0';
		return strlen(s);
	}

	main() {
		format('!', bangcvt);

		/* do something which can generate an error */
		fprintf(stderr, "%s: %!\n", "open failed");
	}
...

(This example may not be correct, but is expected to give the idea of
intended usage.)

I would appreciate comments, suggestions, or volunteers.  I hope to have
a tested and portable implementation available "real soon now".

(Obviously, before any adoption occurs, it will be done with functions
not named printf/fprintf/etc.)

-s
-- 
Peter Seebach - seebs@solon.com - Copyright 1996 Peter Seebach.
C/Unix wizard -- C/Unix questions? Send mail for help.  No, really!
FUCK the communications decency act.  Goddamned government.  [literally.]
The *other* C FAQ - http://www.solon.com/~seebs/c/c-iaq.html