C++ (Cpp) TBox::getAuxConcept Examples

Example #1

File: tAxiom.cpp Project: dgu123/factplusplus

/// absorb into negation of a concept; @return true if absorption is performed
bool
TAxiom :: absorbIntoNegConcept ( TBox& KB ) const
{
	WorkSet Cons;
	TConcept* Concept;
	const DLTree* bestConcept = NULL;

	// finds all primitive negated concept names without description
	for ( const_iterator p = begin(), p_end = end(); p != p_end; ++p )
		if ( (*p)->Element().getToken() == NOT && isName((*p)->Left())
			 && (Concept = InAx::getConcept((*p)->Left()))->isPrimitive()
			 && !Concept->isSingleton() && Concept->Description == NULL )
		{
			Stat::SAbsNAttempt();
			Cons.push_back(*p);
		}

	// if no concept names -- return;
	if ( Cons.empty() )
		return false;

	Stat::SAbsNApply();
	// FIXME!! as for now: just take the 1st concept name
	if ( bestConcept == NULL )
		bestConcept = Cons[0];

	// normal concept absorption
	Concept = InAx::getConcept(bestConcept->Left());

#ifdef RKG_DEBUG_ABSORPTION
	std::cout << " N-Absorb GCI to concept " << Concept->getName();
	if ( Cons.size() > 1 )
	{
		std::cout << " (other options are";
		for ( WorkSet::iterator q = Cons.begin(), q_end = Cons.end(); q != q_end; ++q )
			if ( *q != bestConcept )
				std::cout << " " << InAx::getConcept((*q)->Left())->getName();
		std::cout << ")";
	}
#endif

	// replace ~C [= D with C=~notC, notC [= D:
	// make notC [= D
	TConcept* nC = KB.getAuxConcept(createAnAxiom(bestConcept));
	// define C = ~notC; C had an empty desc, so it's safe not to delete it
	KB.makeNonPrimitive ( Concept, createSNFNot(KB.getTree(nC)) );
	return true;
}