pprolog - A new prolog interpreter for Plan 9. Replaces the old pprolog project.

Age	Commit message (Collapse)	Author
2021-07-06	Store the calling module in each goal, and fix a bug where unification could ↵	Peter Mikkelsen
	leave behind some bindings even though the unification failed.
2021-07-06	Group clauses into predicates, and create all valid choicepoints at once. ↵	Peter Mikkelsen
	This is wastefull if one branch loops forever, but it is much nicer otherwise, since we know the choicepoints only gets created as long as their head is unifiable with the goal.
2021-07-05	Turn integers and floats into seperate term types	Peter Mikkelsen

2021-07-05	First step on modules. Still very very rough.	Peter Mikkelsen

2021-07-03	Make the goalstack global just like the choicestack	Peter Mikkelsen

2021-07-03	Add one global choicestack so we don't need to pass it around	Peter Mikkelsen

2021-07-02	Remove strings, and add a (currently not changable) flag 'double_quotes' ↵	Peter Mikkelsen
	which defines how double quoted strings are stored.
2021-07-01	Add exceptions :) implement catch/3 and throw/1	Peter Mikkelsen

2021-06-30	Add comparison predicates	Peter Mikkelsen

2021-06-30	Add support for builtins, and implement true/0, fail/0, call/1, and !/0 builtins	Peter Mikkelsen

2021-06-30	Add a basic repl	Peter Mikkelsen

2021-06-30	Add backtracking to the evaluator. This means we have to keep track of ↵	Peter Mikkelsen
	choicepoints which is implemented the easy but wasteful way for now. I have also added a number which is used to differentiate variables from different application of the clauses.
2021-06-29	Understand :-initialization(Goal) directive	Peter Mikkelsen

2021-06-29	Add a term parser.	Peter Mikkelsen

2021-06-28	Initial commit. Start working on a new prolog implementation for 9front, now ↵	Peter Mikkelsen
	that I at least have a better understanding of what goes into a compiler :)