🚀 go-pugleaf

In article <111000002@uxa.cso.uiuc.edu>, ddgg0881@uxa.cso.uiuc.edu writes:
> implementations of Prolog that allow 'get' or 'get0' to backtrack
> and unread characters?

From the bts list of Prologs:

NAME:           Basser Prolog
VERSION:        3
SRC/MACHINE/OS: C/Unix (V7, 4.?BSD & others) also VMS
AVAILABILITY:   Educational license, source or binary
COST:           A$300 or US$300 or negotiable, VMS version extra
STATUS:         running, some development & support
FEATURES:
    Fast interpreter, full interface to Unix, Dec-10 debugging
    facilities, real arithmetic, backtrackable I/O, good docu-
				 ^^^^^^^^^^^^^^^^^
    mentation (user manual & tutorial).
CONTACT:        Andrew Taylor (USENET: mulga!basser!andrewt)
                Department of Computer Science
                Sydney University
                Sydney, N.S.W.  2006
                Australia
NOTES:
    Yet another prolog syntax. Most of the code is clean and readable.
    Generally similar to DEC-10 prolog.  Basser Prolog has sufficient
    "features" to make it a reasonable programming environment and a
    useful tool.
DATED:          May 1984

As far as I know Andrew is still at S.U.  The address is a bit out of
date - try andrewt@cs.su.oz.au

	lee