Patrick Lühne
3e096e39aa
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 in order 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 input program: |
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| .. | ||
| output | ||
| ASTCopy.cpp | ||
| ASTUtils.cpp | ||
| Completion.cpp | ||
| HiddenPredicateElimination.cpp | ||
| Simplification.cpp | ||
| Translation.cpp | ||