1 files changed, 106 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/LocalVariableNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/LocalVariableNode.java
new file mode 100644
index 0000000000..bc31cf72ee
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/LocalVariableNode.java
@@ -0,0 +1,106 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import javax.lang.model.element.Element;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+import org.checkerframework.javacutil.TreeUtils;
+
+import com.sun.source.tree.IdentifierTree;
+import com.sun.source.tree.Tree;
+import com.sun.source.tree.VariableTree;
+
+/**
+ * A node for a local variable or a parameter:
+ *
+ * <pre>
+ *   <em>identifier</em>
+ * </pre>
+ *
+ * We allow local variable uses introduced by the {@link org.checkerframework.dataflow.cfg.CFGBuilder} without
+ * corresponding AST {@link Tree}s.
+ *
+ * @author Stefan Heule
+ *
+ */
+// TODO: don't use for parameters, as they don't have a tree
+public class LocalVariableNode extends Node {
+
+    protected Tree tree;
+    protected Node receiver;
+
+    public LocalVariableNode(Tree t) {
+        super(InternalUtils.typeOf(t));
+        // IdentifierTree for normal uses of the local variable or parameter,
+        // and VariableTree for the translation of an initializer block
+        assert t != null;
+        assert t instanceof IdentifierTree || t instanceof VariableTree;
+        tree = t;
+        this.receiver = null;
+    }
+
+    public LocalVariableNode(Tree t, Node receiver) {
+        this(t);
+        this.receiver = receiver;
+    }
+
+    public Element getElement() {
+        Element el;
+        if (tree instanceof IdentifierTree) {
+            el = TreeUtils.elementFromUse((IdentifierTree) tree);
+        } else {
+            assert tree instanceof VariableTree;
+            el = TreeUtils.elementFromDeclaration((VariableTree) tree);
+        }
+        return el;
+    }
+
+    public Node getReceiver() {
+        return receiver;
+    }
+
+    public String getName() {
+        if (tree instanceof IdentifierTree) {
+            return ((IdentifierTree) tree).getName().toString();
+        }
+        return ((VariableTree) tree).getName().toString();
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitLocalVariable(this, p);
+    }
+
+    @Override
+    public String toString() {
+        return getName().toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof LocalVariableNode)) {
+            return false;
+        }
+        LocalVariableNode other = (LocalVariableNode) obj;
+        return getName().equals(other.getName());
+    }
+
+    @Override
+    public int hashCode() {
+        return HashCodeUtils.hash(getName());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        return Collections.emptyList();
+    }
+}