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Code Issues 15 Releases 21 Activity
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37 Commits

Author SHA1 Message Date
Patrick Lühne d66d3557c1
Minor refactoring 2018-04-27 17:25:43 +02:00
Patrick Lühne c294a29cb2
Support placeholders with #external declarations 
This adds support for declaring predicates as placeholders through the
“#external” directive in the input language of clingo.

Placeholders are not subject to completion. This prevents predicates
that represent instance-specific facts from being assumed as universally
false by default negation when translating an encoding.

This stretches clingo’s usual syntax a bit to make the implementation
lightweight. In order to declare a predicate with a specific arity as a
placeholder, the following statement needs to be added to the program:

    #external <predicate name>(<arity>).

Multiple unit tests cover cases where placeholders are used or not as
well as a more complex graph coloring example.
 2018-04-08 20:28:57 +02:00
Patrick Lühne 64bd1c17e3
Improved debug output. 2017-06-02 14:59:13 +02:00
Patrick Lühne 2bc60d3eea
Started implementing support for #show statements. 2017-06-01 04:05:11 +02:00
Patrick Lühne 85614296e2
Improved debug message. 2017-06-01 03:32:19 +02:00
Patrick Lühne 0d8b1e94da
Refactored error handling. 2017-05-31 18:03:19 +02:00
Patrick Lühne 7aad8380d1
Refactored logging interface. 2017-05-30 17:19:26 +02:00
Patrick Lühne 59fbc473df
Dropping now unused head variable names. 2017-05-30 16:40:56 +02:00
Patrick Lühne f78c0e4da5
Reordered constructor parameters of VariableDeclaration. 2017-05-30 16:27:45 +02:00
Patrick Lühne 1c925d661b
Major refactoring to uniquely link variables to their declarations (breaks simplification and completion). 2017-05-30 03:56:35 +02:00
Patrick Lühne 838a68e230
Refactoring to prepare for implementing completion. 2017-04-05 18:15:42 +02:00
Patrick Lühne 5940fc4a3b
Removed workarounds thanks to a fix in clingo. 2017-04-01 03:13:52 +02:00
Patrick Lühne d0cbdb13e5
Fixed misleading error message concerning negated, unsupported body literals. 2017-03-29 23:09:40 +02:00
Patrick Lühne 0e5ee59ea7
Simplified handling of unsupported clingo statements. 2017-03-29 21:32:11 +02:00
Patrick Lühne 09c2674148
Fixed incorrectly translated choice rules with multiple elements in the aggregate. 2017-03-23 02:06:19 +01:00
Patrick Lühne 283cdd2abf
Preparations for returning multiple formulas per input rule (as necessary with head aggregates). 2017-03-23 01:23:17 +01:00
Patrick Lühne 825cd4de39
Refactored formula simplification with Clingo’s variants. 2017-03-23 00:44:10 +01:00
Patrick Lühne 9e6d135781
Implemented explicit syntax tree representation for first-order formulas. 2017-03-15 16:00:43 +01:00
Patrick Lühne 71e6e4107a
Minor restructuring. 2017-03-06 15:42:38 +01:00
Patrick Lühne 70cb79b233
Implemented choice rules. 2017-03-06 15:40:23 +01:00
Patrick Lühne 6167a83a99
Fixed issue with empty integrity constraints and extended unit test. 2016-11-24 17:38:44 +01:00
Patrick Lühne 442fa8791a
Fixed continuous numbering of auxiliary variables. 2016-11-24 16:50:35 +01:00
Patrick Lühne cdfdd8f4ca
Added unit test to check whether escaped user variable names are correctly escaped. 2016-11-24 15:38:55 +01:00
Patrick Lühne 223d380a03
Indexing variables from 1 on and not 0. 2016-11-24 15:25:34 +01:00
Patrick Lühne c92de5e461
Removed unwanted newline. 2016-11-24 14:47:02 +01:00
Patrick Lühne c760edb141
Fixed missing usages of new output format. 2016-11-24 03:36:14 +01:00
Patrick Lühne 47d7058f5a
Consistently printing operators and Booleans. 2016-11-24 03:20:22 +01:00
Patrick Lühne e65ec9b6c1
Fixed incorrect auxiliary variable naming. 2016-11-24 03:11:36 +01:00
Patrick Lühne 3fbe8ac407
Fixed missing reset on collected head term vector. 2016-11-24 03:08:36 +01:00
Patrick Lühne 018559b8cf
Started implementing color output (currently for head only). 2016-11-24 02:42:32 +01:00
Patrick Lühne 6af3b7b875
Made all visitors consistent in taking an Context object as an argument. 2016-11-24 00:52:28 +01:00
Patrick Lühne 225816538b
Implemented translation of negated body literals. 2016-11-23 05:00:34 +01:00
Patrick Lühne 29d1c15137
Implemented translation of positive body literals. 2016-11-23 05:00:33 +01:00
Patrick Lühne 9ccbda49b7
Implemented head translation. 2016-11-23 05:00:33 +01:00
Patrick Lühne 870be1680e
Made output of Boolean variables consistent with clingo’s input language. 2016-11-23 05:00:29 +01:00
Patrick Lühne 920f3ab210
Started implementing translation of head literals. 2016-11-22 17:58:18 +01:00
Patrick Lühne 7e7baa1aab
Wrote simple dummy parser. 2016-11-22 03:15:52 +01:00