618189368c
Split functions from their declarations
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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
d0debc6ad1
Split predicates from their declarations
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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
e15a6b2e88
Remove Constant class
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Constants are not a construct present in Clingo’s AST and were
unintentionally made part of anthem’s AST. This removes the unused
classes for clarity.
2018-04-27 17:08:41 +02:00
8c250f5c59
Support modulus operation (absolute value)
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This adds support for computing the absolute value of a term along with
an according unit test.
2018-04-12 00:38:48 +02:00
797660d6de
Add new simplification rule
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This adds the rule “(not F [comparison] G) === (F [negated comparison]
G)” to the simplification rule tableau.
2018-04-11 21:39:27 +02:00
40ddee8444
Add new simplification rule
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This adds the rule “(not F or G) === (F -> G)” to the simplification
rule tableau.
2018-04-10 22:34:47 +02:00
6f7b021712
Add new simplification rule
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This adds the rule “(not (F and G)) === (not F or not G)” to the
simplification rule tableau.
2018-04-10 22:34:47 +02:00
23624007ec
Add new simplification rule
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This adds the rule “not not F === F” to the simplification rule tableau.
2018-04-10 22:34:47 +02:00
6d7b91c391
Add new simplification rule
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This adds the rule “(F <-> (F and G)) === (F -> G)” to the
simplification rule tableau.
2018-04-10 22:34:47 +02:00
b88393655a
Iteratively apply simplification tableau rules
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With this change, the tableau rules for simplifying formula are applied
iteratively until a fixpoint is reached.
2018-04-10 22:34:47 +02:00
c4c3156e77
Move simplification rule to tableau
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This moves the rule “[primitive A] in [primitive B] === A = B” to the
simplification rule tableau.
2018-04-10 22:34:47 +02:00
107dae7287
Move simplification rule to tableau
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This moves the rule “exists () (F) === F” to the simplification rule
tableau.
2018-04-10 22:34:47 +02:00
827d6e40fe
Move simplification rule to tableau
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This moves the rule “[conjunction of only F] === F” to the
simplification rule tableau.
2018-04-10 22:34:47 +02:00
4a85fc4b23
Move simplification rule to tableau
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This moves the rule “exists ... ([#true/#false]) === [#true/#false]” to
the simplification rule tableau along with “[empty conjunction] ===
2018-04-10 22:34:46 +02:00
7e3fc007c8
Move simplification rule to tableau
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This moves the rule “exists X (X = t and F(X)) === exists () (F(t))” to
the simplification rule tableau.
2018-04-10 22:34:46 +02:00
5c5411c0ff
Implement simplification rule tableau
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This implements a tableau containing simplification rules that can be
iteratively applied to input formulas until they remain unchanged.
First, this moves the rule “exists X (X = Y) === #true” to the tableau
as a reference implementation.
2018-04-10 22:34:46 +02:00
e64b2e70de
Remove unused captured lambda reference
2018-04-08 20:44:43 +02:00
c294a29cb2
Support placeholders with #external declarations
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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
22238bb398
Switch to C++17
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With C++17, optionals, an experimental language feature, were moved to
the “std” namespace. This makes C++17 mandatory and drops the now
obsolete “experimental” namespace.
2018-03-24 16:09:52 +01:00
5f8c144628
Fixed regression in simplifying predicates with more than one argument.
2017-06-12 18:27:39 +02:00
1f1006ea96
Corrected hiding predicates that are simple propositions.
2017-06-12 15:40:02 +02:00
a4cd133ba7
Correctly implemented hiding predicates with nested arguments.
2017-06-12 02:25:04 +02:00
bbbd0b65a4
Added new option --parentheses=full to make parsing the output easier.
2017-06-06 02:02:26 +02:00
0285c1cbbb
Renamed internal variables for clarity.
2017-06-06 01:44:44 +02:00
95984f0447
Added warning when attempting to use #show statements without completion.
2017-06-05 04:24:00 +02:00
7ae0a1f289
Removed unnecessary parentheses after simplification.
2017-06-05 03:58:39 +02:00
3b26580815
Minor formatting.
2017-06-05 03:54:17 +02:00
14abc37116
Implemented #show statements for completed output.
2017-06-05 03:02:22 +02:00
4fd143ef64
Added simplification rule “exists X (X = Y)” → “#true.”
2017-06-05 02:41:17 +02:00
7bf5d3867d
Minor clarification on side effects of a function.
2017-06-05 00:19:43 +02:00
ab71e8eb0a
Minor refactoring.
2017-06-04 20:55:25 +02:00
dcc504ebc0
Added another simplification step after completion.
2017-06-04 20:55:24 +02:00
381d55b6ed
Minor formatting fix.
2017-06-01 16:16:06 +02:00
2bc60d3eea
Started implementing support for #show statements.
2017-06-01 04:05:11 +02:00
cdcee897ec
Added missing error message when input file does not exist.
2017-06-01 03:29:09 +02:00
4baed6fbc6
Added back completion support.
2017-06-01 02:37:45 +02:00
0d8b1e94da
Refactored error handling.
2017-05-31 18:03:19 +02:00
1de0486989
Removed unnecessary namespace identifiers.
2017-05-30 18:13:31 +02:00
664a57ec68
Fixed issue with multi-layer variable stacks.
2017-05-30 18:09:33 +02:00
7aad8380d1
Refactored logging interface.
2017-05-30 17:19:26 +02:00
8214d7837a
Fixed incorrect variable declaration look-up in variable stack.
2017-05-30 16:40:14 +02:00
2964dd1309
Restricting variable stack look-up to user-defined variables.
2017-05-30 16:39:44 +02:00
f78c0e4da5
Reordered constructor parameters of VariableDeclaration.
2017-05-30 16:27:45 +02:00
1917f18b6a
Added back simplification support.
2017-05-30 04:06:56 +02:00
1c925d661b
Major refactoring to uniquely link variables to their declarations (breaks simplification and completion).
2017-05-30 03:56:35 +02:00
c2f8762dc1
Removed unnecessary CMake directive.
2017-05-08 14:41:02 +02:00
6e7abb283e
Fixed minor incorrect variable references.
2017-04-10 17:50:19 +02:00
5948d30e5c
Refactored implementation of completion.
2017-04-10 16:32:12 +02:00
37526bcc8e
Fixed incorrect handling of implications with Booleans.
2017-04-08 20:17:01 +02:00
8210adea7c
Added support for completion of integrity constraints.
2017-04-08 18:25:59 +02:00
