dataflow.src.org.checkerframework.dataflow.cfg.node.ShortLiteralNode Maven / Gradle / Ivy

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

Show newest version

package org.checkerframework.dataflow.cfg.node;

import java.util.Collection;
import java.util.Collections;

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

/**
 * A node for a short literal. For example:
 *
 *  *   5
 *   0x8fff
 * 
 *
 * Java source and the AST representation do not have "short" literals. They
 * have integer literals that may be narrowed to shorts depending on context. If
 * we use explicit NarrowingConversionNodes, do we need ShortLiteralNodes too?
 * TODO: Decide this question.
 *
 * @author Stefan Heule
 * @author Charlie Garrett
 *
 */
public class ShortLiteralNode extends ValueLiteralNode {

    public ShortLiteralNode(LiteralTree t) {
        super(t);
        assert t.getKind().equals(Tree.Kind.INT_LITERAL);
    }

    @Override
    public Short getValue() {
        return (Short) tree.getValue();
    }

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

    @Override
    public boolean equals(Object obj) {
        // test that obj is a ShortLiteralNode
        if (obj == null || !(obj instanceof ShortLiteralNode)) {
            return false;
        }
        // super method compares values
        return super.equals(obj);
    }

    @Override
    public Collection getOperands() {
        return Collections.emptyList();
    }
}