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Author SHA1 Message Date
patrick 6d7b91c391 Add new simplification rule 
This adds the rule “(F <-> (F and G)) === (F -> G)” to the
simplification rule tableau.
 2018-04-10 22:34:47 +02:00
patrick b88393655a Iteratively apply simplification tableau rules 
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
patrick c4c3156e77 Move simplification rule to tableau 
This moves the rule “[primitive A] in [primitive B] === A = B” to the
simplification rule tableau.
 2018-04-10 22:34:47 +02:00
patrick 107dae7287 Move simplification rule to tableau 
This moves the rule “exists () (F) === F” to the simplification rule
tableau.
 2018-04-10 22:34:47 +02:00
patrick 827d6e40fe Move simplification rule to tableau 
This moves the rule “[conjunction of only F] === F” to the
simplification rule tableau.
 2018-04-10 22:34:47 +02:00
patrick 4a85fc4b23 Move simplification rule to tableau 
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
patrick 7e3fc007c8 Move simplification rule to tableau 
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
patrick 5c5411c0ff Implement simplification rule tableau 
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
patrick eaabeb0c55 Support exponentiation operator 
Because of a bug in the Clingo API, the exponentation operator was not
properly exposed to anthem. This updates Clingo to a version with a
fixed API and adds proper support for exponentation within anthem along
with a matching unit test.
 2018-04-10 22:29:55 +02:00
patrick 7b6729acaa Add missing dependency to Ubuntu image 
For some reason, Bison is not implicitly installed along with the other
dependencies in the Ubuntu 18.04 image used for continuous integration.
This adds Bison explicitly.
 2018-04-10 22:29:55 +02:00
patrick 92fddd6665 Version bump after release 0.1.7 2018-04-08 21:03:20 +02:00
patrick 582b6ade6d Version bump for release 0.1.7 v0.1.7 2018-04-08 20:44:43 +02:00
patrick e64b2e70de Remove unused captured lambda reference 2018-04-08 20:44:43 +02:00
patrick d7e4af98d7 Update copyright year in license file 2018-04-08 20:35:03 +02:00
patrick a406cb43bd Update graph coloring example with placeholders 
This replaces the former graph coloring example with a new formulation
that makes use of the newly supported placeholders.
 2018-04-08 20:28:57 +02:00
patrick 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 c91cbaf58b Update Catch to 2.2.2 2018-04-07 00:22:01 +02:00
patrick 2a2fec0eac Update change log with dependency change 
This adds the dependency change from Boost (for program options) to
cxxopts to the change log.
 2018-04-06 23:08:57 +02:00
patrick 09e56c3bce Format change log sections with proper headings 
This makes the change log sections have proper headings, which were just
normal text before.
 2018-04-06 22:53:59 +02:00
patrick e2c0d6b705 Update cxxopts to 2.0.0+3+gabe9ebd 
With cxxopts 2.0.0, positional arguments weren’t recognized when other
command-line options were passed before. This has been fixed in the
meantime, but there is no release with the bug fix yet.

This updates cxxopts to a newer commit to ship anthem with this fix.
 2018-04-06 22:44:14 +02:00
patrick e01506f9ff Drop Boost dependency 
Boost was only used for program option parsing. To avoid this huge
dependency, this commit replaces boost::program_options with cxxopts,
a header-only library with the same functionality.

cxxopts is added as a submodule, and Boost is removed from the
dependencies in the code and Travis configuration.
 2018-03-25 17:24:06 +02:00
patrick 50ebf3c6de Install g++ package explicitly on Ubuntu 
Apparently, g++ is only installed because of the Boost dependency.
Make the g++ dependency explicit to avoid future package errors.
 2018-03-25 17:23:33 +02:00
patrick fde2af5841 Add clang to Travis configurations 
This adds the clang compiler to the tested Travis configurations.
 2018-03-24 18:53:51 +01:00
patrickandpatrick 22238bb398 Switch to C++17 
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
patrickandpatrick c7d1026a31 Switch Travis to Docker 
As Travis only provides outdated packages (compilers in particular),
this changes the Travis configuration to use Docker images to build and
test the code. This also has the benefit that multiple distributions can
be tested and not just Ubuntu.

For the time being, Arch Linux and Ubuntu 18.04 are added as supported
platforms.
 2018-03-24 15:51:20 +01:00
patrick 6b1cf6735e Update clingo to 5.2.2 2018-03-21 16:41:08 +01:00
patrick addc65e3c5 Update Catch to 2.2.1 2018-03-21 16:35:54 +01:00
patrick 427e5705c7 Fixed order of CMake options. v0.1.0 v0.1.1 v0.1.2 v0.1.3 v0.1.4 v0.1.5 v0.1.6 2017-06-20 02:05:12 +02:00
patrick bda57b2fe7 Fixed incorrect handling of CMake options. 2017-06-18 15:04:45 +02:00
patrick b7cd875f0e Updated Catch. 2017-06-15 15:27:51 +02:00
patrick be19a5f66b Version bump after release 0.1.6. 2017-06-13 00:14:16 +02:00
patrick 675a3e2eb7 Version bump for release 0.1.6. 2017-06-12 18:38:36 +02:00
patrick 4f399a594a Updated change log with new examples for experimenting. 2017-06-12 18:35:06 +02:00
patrick 5f8c144628 Fixed regression in simplifying predicates with more than one argument. 2017-06-12 18:27:39 +02:00
patrick 64c9a741c4 Added example with simple propositions. 2017-06-12 15:42:23 +02:00
patrick 1f1006ea96 Corrected hiding predicates that are simple propositions. 2017-06-12 15:40:02 +02:00
patrick 7665cb7bf1 Added unit test for the completion of predicates with nested arguments. 2017-06-12 15:32:05 +02:00
patrick d7641aa410 Added example with nested predicate arguments. 2017-06-12 03:05:21 +02:00
patrick eb730b9f8b Added example for attempting to hide a circular predicate dependency. 2017-06-12 03:01:30 +02:00
patrick ecdefa9221 Added graph coloring example. 2017-06-12 02:53:02 +02:00
patrick c1899a6347 Added Schur numbers example. 2017-06-12 02:27:57 +02:00
patrick a4cd133ba7 Correctly implemented hiding predicates with nested arguments. 2017-06-12 02:25:04 +02:00
patrick 1d172589f5 Rephrased change log entry for clarity. 2017-06-09 22:13:05 +02:00
patrick 649489a1eb Renamed unit test for clarity. 2017-06-09 22:10:43 +02:00
patrick fd40bd1a5b Added bug fix to change log. 2017-06-09 22:02:02 +02:00
patrick cbe87d8cb7 Fixed issue with simplifying binary operations in arguments. 2017-06-09 22:00:00 +02:00
patrick 9d1a1249d3 Removed obsolete to-do. 2017-06-09 20:19:46 +02:00
patrick 0d5fb00286 Updated clingo. 2017-06-06 19:26:33 +02:00
patrick 1e887594c7 Updated change log with new option --parentheses. 2017-06-06 02:07:21 +02:00
patrick bbbd0b65a4 Added new option --parentheses=full to make parsing the output easier. 2017-06-06 02:02:26 +02:00