/*
 * Copyright © 2024-2026 Apple Inc. and the Pkl project authors. All rights reserved.
 *
 * 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
 *
 *     https://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 org.pkl.core.ast.internal;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import org.jspecify.annotations.Nullable;
import org.pkl.core.ast.ExpressionNode;

/** Ensures that `childNode` isn't optimized away. */
@NodeChild(value = "childNode", type = ExpressionNode.class)
public abstract class BlackholeNode extends ExpressionNode {
  @Specialization
  protected @Nullable Object evalBoolean(boolean value) {
    CompilerDirectives.blackhole(value);
    return null;
  }

  @Specialization
  protected @Nullable Object evalInt(long value) {
    CompilerDirectives.blackhole(value);
    return null;
  }

  @Specialization
  protected @Nullable Object evalFloat(double value) {
    CompilerDirectives.blackhole(value);
    return null;
  }

  @Specialization
  protected @Nullable Object evalObject(Object value) {
    CompilerDirectives.blackhole(value);
    return null;
  }

  @Override
  public boolean isInstrumentable() {
    return false;
  }
}
