This is my attempt to make the SHRDLU program executable. Other information about SHRDLU project is possible to find on the wikipedia pages.
In order to run it, I chose a different approach. Instead of rewriting it to the current version of the programming language, I programmed a simple maclisp version 1970 interpreter. My goal was to change the original SHRDLU source code as little as possible.
I did not program all its functions, only those that are necessary to run the SHRDLU program. Some features are not implemented, some are partially implemented. I've added a few more functions to debug programs much easier. The interpreter is not programmed effectively now. For example, a macro expands during evaluation instead of reading expressions. The project is still in the "middle of the work" state. Because there are differences between my interpreter and the maclisp I named it etaoin to avoid confusion.
Any comments, improvement ideas, bug fixes are welcome.
It is developed on ubuntu mate Linux version 20.04.
To build this project requires some tools to be installed:
- OpenJDK 14 or higher version
- ant
- wget
- diff, patch tools
- rlwrap
Whole the project is possible to build by build.sh script. It builds
etaoin.jar file, downloads original SHRDLU sources
code.tar and
applies patches to them.
cd etaoin-shrdlu
./build.sh
cd etaoin-shrdlu
./etaoin
(load 'loader)
(run)
Pick up a big red block.
Find a block which is taller than the one you are holding and put it into the box.
What does the box contain?
How many blocks are not in the box?
Did you touch any block?
How many things are on top of green cubes?
~d
This code is released under Mozilla Public License 2.0.
Copyright (c) 2021 Peter Cerman (https://github.com/pcerman)