Patrick Lühne
5f771770b3
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:
44 lines
989 B
C++
44 lines
989 B
C++
#ifndef __ANTHEM__CONTEXT_H
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#define __ANTHEM__CONTEXT_H
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#include <optional>
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#include <anthem/AST.h>
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#include <anthem/output/Logger.h>
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#include <anthem/output/ParenthesisStyle.h>
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namespace anthem
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Context
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct Context
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{
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Context() = default;
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explicit Context(output::Logger &&logger)
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: logger{std::move(logger)}
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{
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}
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output::Logger logger;
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bool performSimplification = false;
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bool performCompletion = false;
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std::optional<std::vector<ast::PredicateSignature>> visiblePredicateSignatures;
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std::optional<std::vector<ast::PredicateSignature>> externalPredicateSignatures;
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ast::ParenthesisStyle parenthesisStyle = ast::ParenthesisStyle::Normal;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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#endif
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