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-rw-r--r--third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/EqualToNode.java82
1 files changed, 82 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/EqualToNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/EqualToNode.java
new file mode 100644
index 0000000000..ed56d4ab68
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/EqualToNode.java
@@ -0,0 +1,82 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import java.util.Collection;
+import java.util.LinkedList;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+
+import com.sun.source.tree.BinaryTree;
+import com.sun.source.tree.Tree.Kind;
+
+/**
+ * A node for an equality check:
+ *
+ * <pre>
+ * <em>expression</em> == <em>expression</em>
+ * </pre>
+ *
+ * @author Stefan Heule
+ *
+ */
+public class EqualToNode extends Node {
+
+ protected BinaryTree tree;
+ protected Node lhs;
+ protected Node rhs;
+
+ public EqualToNode(BinaryTree tree, Node lhs, Node rhs) {
+ super(InternalUtils.typeOf(tree));
+ assert tree.getKind().equals(Kind.EQUAL_TO);
+ this.tree = tree;
+ this.lhs = lhs;
+ this.rhs = rhs;
+ }
+
+ public Node getLeftOperand() {
+ return lhs;
+ }
+
+ public Node getRightOperand() {
+ return rhs;
+ }
+
+ @Override
+ public BinaryTree getTree() {
+ return tree;
+ }
+
+ @Override
+ public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+ return visitor.visitEqualTo(this, p);
+ }
+
+ @Override
+ public String toString() {
+ return "(" + getLeftOperand() + " == " + getRightOperand() + ")";
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null || !(obj instanceof EqualToNode)) {
+ return false;
+ }
+ EqualToNode other = (EqualToNode) obj;
+ return getLeftOperand().equals(other.getLeftOperand())
+ && getRightOperand().equals(other.getRightOperand());
+ }
+
+ @Override
+ public int hashCode() {
+ return HashCodeUtils.hash(getLeftOperand(), getRightOperand());
+ }
+
+ @Override
+ public Collection<Node> getOperands() {
+ LinkedList<Node> list = new LinkedList<Node>();
+ list.add(getLeftOperand());
+ list.add(getRightOperand());
+ return list;
+ }
+}