Re: FRESH-LINE and #\Tab

[Bruno H. <br...@cl...>]

Sam wrote:
> PS. has the FRESH-LINE issue been settled?
>     <http://article.gmane.org/gmane.lisp.clisp.devel:14259>

Although in general the line position after outputting a tab is undefined,
I can admit that in all cases it will be > 0, and that FRESH-LINE should
notice this.

The fix will be to complement the stream's strm_wr_ch_lpos field with a
strm_wr_ch_lpos_positive field that is 1 if the line-position is known
to be > 0 and 0 otherwise. That's for built-in streams. For Gray streams,
test whether (STREAM-LINE-COLUMN stream) is > 0. It will be a bit of a
slow-down. Oh well. And since it's a change that touches a dozen of C
functions, it must be delayed after 2.34.

Bruno