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add non-backtrackable and backtrackable global variables

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Mark Thom
2019-03-13 00:16:57 -06:00
parent f0f8bfb569
commit 0eb2fb3d90
5 changed files with 19 additions and 14 deletions
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README.md
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@@ -46,8 +46,10 @@ Extend Scryer Prolog to include the following, among other features:
paper "Indexing `dif/2`" (_done_).
* All-solutions predicates (`findall/{3,4}`, `bagof/3`, `setof/3`) (_done_).
* Clause creation and destruction (`asserta/1`, `assertz/1`,
`retract/1`, `abolish/1`) with logical update semantics (_done_).
* Backtrackable global variables via `bb_get/2` and `bb_put/2` (_done_).
`retract/1`, `abolish/1`) with logical update semantics (_done_).
* Backtrackable and non-backtrackable global variables via `bb_get/2`
`bb_put/2` (non-backtrackable) and `b_bb_put/2`
(backtrackable). (_done_).
* Streams and predicates for stream control (_in progress_).
* An incremental compacting garbage collector satisfying the five
properties of "Precise Garbage Collection in Prolog."