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

Go to download

Show more of this group Show more artifacts with this name
Show all versions of checker Show documentation

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.

There is a newer version: 3.42.0-eisop4

Show newest version

package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.BinaryTree;
import com.sun.source.tree.Tree;

import org.checkerframework.checker.nullness.qual.Nullable;

import java.util.Objects;

/**
 * A node for the less than comparison:
 *
 *  *   expression < expression
 * 
 *
 * We allow less than nodes without corresponding AST {@link Tree}s.
 */
public class LessThanNode extends BinaryOperationNode {

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

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

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

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

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