org.checkerframework.dataflow.cfg.node.NumericalSubtractionNode Maven / Gradle / Ivy

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The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.BinaryTree;
import com.sun.source.tree.Tree;
import java.util.Objects;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A node for the numerical subtraction:
 *
 *  *   expression - expression
 * 
 */
public class NumericalSubtractionNode extends BinaryOperationNode {

  /**
   * Constructs a {@link NumericalSubtractionNode}.
   *
   * @param tree the binary tree
   * @param left the left operand
   * @param right the right operand
   */
  public NumericalSubtractionNode(BinaryTree tree, Node left, Node right) {
    super(tree, left, right);
    assert tree.getKind() == Tree.Kind.MINUS;
  }

  @Override
  public  R accept(NodeVisitor visitor, P p) {
    return visitor.visitNumericalSubtraction(this, p);
  }

  @Override
  public String toString() {
    return "(" + getLeftOperand() + " - " + getRightOperand() + ")";
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    if (!(obj instanceof NumericalSubtractionNode)) {
      return false;
    }
    NumericalSubtractionNode other = (NumericalSubtractionNode) obj;
    return getLeftOperand().equals(other.getLeftOperand())
        && getRightOperand().equals(other.getRightOperand());
  }

  @Override
  public int hashCode() {
    return Objects.hash(getLeftOperand(), getRightOperand());
  }
}