1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/block/SpecialBlock.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/block/SpecialBlock.java
new file mode 100644
index 0000000000..805a3b5135
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/block/SpecialBlock.java
@@ -0,0 +1,34 @@
+package org.checkerframework.dataflow.cfg.block;
+
+/**
+ * Represents a special basic block; i.e., one of the following:
+ * <ul>
+ * <li>Entry block of a method.</li>
+ * <li>Regular exit block of a method.</li>
+ * <li>Exceptional exit block of a method.</li>
+ * </ul>
+ *
+ * @author Stefan Heule
+ *
+ */
+public interface SpecialBlock extends SingleSuccessorBlock {
+
+    /** The types of special basic blocks */
+    public static enum SpecialBlockType {
+
+        /** The entry block of a method */
+        ENTRY,
+
+        /** The exit block of a method */
+        EXIT,
+
+        /** A special exit block of a method for exceptional termination */
+        EXCEPTIONAL_EXIT,
+    }
+
+    /**
+     * @return the type of this special basic block
+     */
+    SpecialBlockType getSpecialType();
+
+}