This folder contains a Logtalk port of ToyCHR, a reference implementation of Constraint Handling Rules (CHR) available from:
The port is work in progress and includes significant modifications to the original code:
- Instead of compiling
.chrfiles, it uses the term-expansion mechanism, by defining
toychrdbas a hook object, to support writing rules inside objects and categories. As a consequence, the original
chr_compile/1is not available.
- The port is portable and should run on all supported backends.
The port also includes examples ported from the SWI-Prolog CHR package examples and documentation. These examples are ported using the same license of the original code (BSD-2-Clause).
For sample queries, please see the
To load all entities in this port, load the
| ?- logtalk_load(toychr(loader)).
To test this port predicates, load the
| ?- logtalk_load(toychr(tester)).