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Solver subproject in the Theta model checking framework

There is a newer version: 6.5.2

/*
 *  Copyright 2024 Budapest University of Technology and Economics
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package hu.bme.mit.theta.solver;

import java.util.List;

/**
 * Interface for an element of an interpolation pattern.
 */
public interface ItpPattern {

    /**
     * ItpPatter visitor function
     *
     * @param visitor The visitor
     * @param      The return type of the visitor
     * @return Returns the result of the visitor
     */
     E visit(final ItpPatternVisitor visitor);

    /**
     * Interface for a binary interpolation pattern
     */
    interface Binary extends ItpPattern {

        T getA();

        T getB();

        @Override
        default  E visit(final ItpPatternVisitor visitor) {
            return visitor.visitBinaryPattern(this);
        }
    }

    /**
     * Interface for a sequence interpolation pattern
     */
    interface Sequence extends ItpPattern {

        List getSequence();

        @Override
        default  E visit(final ItpPatternVisitor visitor) {
            return visitor.visitSequencePattern(this);
        }
    }

    /**
     * Interface for a tree interpolation pattern
     */
    interface Tree extends ItpPattern {

        ItpMarkerTree getRoot();

        @Override
        default  E visit(final ItpPatternVisitor visitor) {
            return visitor.visitTreePattern(this);
        }
    }

    interface ItpPatternVisitor {

        E visitBinaryPattern(final Binary binaryPattern);

        E visitSequencePattern(final Sequence sequencePattern);

        E visitTreePattern(final Tree treePattern);
    }

}