1 files changed, 73 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NumericalMinusNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NumericalMinusNode.java
new file mode 100644
index 0000000000..459f299262
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NumericalMinusNode.java
@@ -0,0 +1,73 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+
+import com.sun.source.tree.Tree;
+import com.sun.source.tree.Tree.Kind;
+
+/**
+ * A node for the unary minus operation:
+ *
+ * <pre>
+ *   - <em>expression</em>
+ * </pre>
+ *
+ * @author Stefan Heule
+ * @author Charlie Garrett
+ *
+ */
+public class NumericalMinusNode extends Node {
+
+    protected Tree tree;
+    protected Node operand;
+
+    public NumericalMinusNode(Tree tree, Node operand) {
+        super(InternalUtils.typeOf(tree));
+        assert tree.getKind() == Kind.UNARY_MINUS;
+        this.tree = tree;
+        this.operand = operand;
+    }
+
+    public Node getOperand() {
+        return operand;
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitNumericalMinus(this, p);
+    }
+
+    @Override
+    public String toString() {
+        return "(- " + getOperand() + ")";
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof NumericalMinusNode)) {
+            return false;
+        }
+        NumericalMinusNode other = (NumericalMinusNode) obj;
+        return getOperand().equals(other.getOperand());
+    }
+
+    @Override
+    public int hashCode() {
+        return HashCodeUtils.hash(getOperand());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        return Collections.singletonList(getOperand());
+    }
+}