package asp;

import de.dhbwstuttgart.parser.NullToken;
import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
import de.dhbwstuttgart.syntaxtree.factory.ASTFactory;
import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
import de.dhbwstuttgart.typeinference.constraints.Pair;
import de.dhbwstuttgart.typeinference.unify.model.PairOperator;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

public class UnifyWithoutWildcards {

    public Collection<ClassOrInterface> getFC() {
        Set<ClassOrInterface> ret = new HashSet<>();
        ret.add(ASTFactory.createObjectClass());
        ret.add(ASTFactory.createClass(java.util.List.class));
        return ret;
    }

    public ConstraintSet<Pair> getPairs() {
        ConstraintSet<Pair> ret = new ConstraintSet<>();
        ret.addUndConstraint(new Pair(TypePlaceholder.fresh(new NullToken()), ASTFactory.createObjectType(), PairOperator.SMALLERDOT));
        return ret;
    }
}