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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.graalvm.compiler.phases;

import org.graalvm.compiler.nodes.StructuredGraph;

This phase serves as a verification, in order to check the graph for certain properties. The verify(StructuredGraph, Object) method will be used as an assertion, and implements the actual check. Instead of returning false, it is also valid to throw an VerificationError in the implemented verify(StructuredGraph, Object) method. /***
 * This phase serves as a verification, in order to check the graph for certain properties. The
 * {@link #verify(StructuredGraph, Object)} method will be used as an assertion, and implements the
 * actual check. Instead of returning false, it is also valid to throw an {@link VerificationError}
 * in the implemented {@link #verify(StructuredGraph, Object)} method.
 */
public abstract class VerifyPhase<C> extends BasePhase<C> {

    
Thrown when verification performed by a VerifyPhase fails. /**
     * Thrown when verification performed by a {@link VerifyPhase} fails.
     */
    @SuppressWarnings("serial")
    public static class VerificationError extends AssertionError {

        public VerificationError(String message) {
            super(message);
        }

        public VerificationError(String format, Object... args) {
            super(String.format(format, args));
        }

        public VerificationError(String message, Throwable cause) {
            super(message, cause);
        }
    }

    @Override
    protected final void run(StructuredGraph graph, C context) {
        assert verify(graph, context);
    }

    
Performs the actual verification.
Throws:
VerificationError – if the verification fails/**
     * Performs the actual verification.
     *
     * @throws VerificationError if the verification fails
     */
    protected abstract boolean verify(StructuredGraph graph, C context);
}