1 files changed, 80 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NarrowingConversionNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NarrowingConversionNode.java
new file mode 100644
index 0000000000..f0165d9589
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NarrowingConversionNode.java
@@ -0,0 +1,80 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import javax.lang.model.type.TypeMirror;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.TypesUtils;
+
+import com.sun.source.tree.Tree;
+
+/**
+ * A node for the narrowing primitive conversion operation. See JLS 5.1.3 for
+ * the definition of narrowing primitive conversion.
+ *
+ * A {@link NarrowingConversionNode} does not correspond to any tree node in the
+ * parsed AST. It is introduced when a value of some primitive type appears in a
+ * context that requires a different primitive with more bits of precision.
+ *
+ * @author Stefan Heule
+ * @author Charlie Garrett
+ *
+ */
+public class NarrowingConversionNode extends Node {
+
+    protected Tree tree;
+    protected Node operand;
+
+    public NarrowingConversionNode(Tree tree, Node operand, TypeMirror type) {
+        super(type);
+        assert TypesUtils.isPrimitive(type) : "non-primitive type in narrowing conversion";
+        this.tree = tree;
+        this.operand = operand;
+    }
+
+    public Node getOperand() {
+        return operand;
+    }
+
+    public TypeMirror getType() {
+        return type;
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitNarrowingConversion(this, p);
+    }
+
+    @Override
+    public String toString() {
+        return "NarrowingConversion(" + getOperand() + ", " + type + ")";
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof NarrowingConversionNode)) {
+            return false;
+        }
+        NarrowingConversionNode other = (NarrowingConversionNode) obj;
+        return getOperand().equals(other.getOperand())
+                && TypesUtils.areSamePrimitiveTypes(getType(), other.getType());
+    }
+
+    @Override
+    public int hashCode() {
+        return HashCodeUtils.hash(getOperand());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        return Collections.singletonList(getOperand());
+    }
+}