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Code Issues 15 Releases 21 Activity
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40 Commits

Author SHA1 Message Date
Patrick Lühne 09ef64a0e1
Support declaring functions as integer 
This adds a new syntax for declaring functions integer:

    #external integer(<function name>(<arity)).

If a function is declared integer, it may enable some variables to be
detected as integer as well.
 2018-04-28 01:48:39 +02:00
Patrick Lühne 618189368c
Split functions from their declarations 
This splits occurrences of functions from their declaration. This is
necessary to flag integer functions consistently and not just single
occurrences.
 2018-04-27 17:59:10 +02:00
Patrick Lühne d0debc6ad1
Split predicates from their declarations 
This refactoring separates predicates from their declarations. The
purpose of this is to avoid duplicating properties specific to the
predicate declaration and not its occurrences in the program.
 2018-04-27 17:55:59 +02:00
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