content: /*
   * 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 io.airlift.bytecode.expression;
  
  import com.google.common.collect.ImmutableList;
  import io.airlift.bytecode.BytecodeBlock;
  import io.airlift.bytecode.BytecodeNode;
  import io.airlift.bytecode.MethodGenerationContext;
  import io.airlift.bytecode.OpCode;
  
  import java.util.List;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static io.airlift.bytecode.expression.ArithmeticBytecodeExpression.getNumericOpCode;
  import static java.util.Objects.requireNonNull;
  
  class NegateBytecodeExpression
          extends BytecodeExpression
  {
      private final BytecodeExpression value;
      private final OpCode negateOpCode;
  
      NegateBytecodeExpression(BytecodeExpression value)
      {
          super(requireNonNull(value, "value is null").getType());
          this.value = value;
  
          Class<?> type = value.getType().getPrimitiveType();
          checkArgument(type != null, "value is not a primitive");
          checkArgument(type != void.class, "value is void");
          checkArgument(type == int.class || type == long.class || type == float.class || type == double.class,
                  "value argument must be int, long, float, or double, but is %s",
                  type);
  
          negateOpCode = getNumericOpCode("Negate", OpCode.INEG, type);
      }
  
      @Override
      public BytecodeNode getBytecode(MethodGenerationContext generationContext)
      {
          return new BytecodeBlock()
                  .append(value)
                  .append(negateOpCode);
      }
  
      @Override
      public List<BytecodeNode> getChildNodes()
      {
          return ImmutableList.of(value);
      }
  
      @Override
      protected String formatOneLine()
      {
          return "-(" + value + ")";
      }
  }
  