Issue #2335: Backport set literals syntax from Python 3.x.
diff --git a/Include/opcode.h b/Include/opcode.h
index 9739782..3824f7f 100644
--- a/Include/opcode.h
+++ b/Include/opcode.h
@@ -99,13 +99,14 @@
 #define LOAD_NAME	101	/* Index in name list */
 #define BUILD_TUPLE	102	/* Number of tuple items */
 #define BUILD_LIST	103	/* Number of list items */
-#define BUILD_MAP	104	/* Always zero for now */
-#define LOAD_ATTR	105	/* Index in name list */
-#define COMPARE_OP	106	/* Comparison operator */
-#define IMPORT_NAME	107	/* Index in name list */
-#define IMPORT_FROM	108	/* Index in name list */
-
+#define BUILD_SET	104     /* Number of set items */
+#define BUILD_MAP	105	/* Always zero for now */
+#define LOAD_ATTR	106	/* Index in name list */
+#define COMPARE_OP	107	/* Comparison operator */
+#define IMPORT_NAME	108	/* Index in name list */
+#define IMPORT_FROM	109	/* Index in name list */
 #define JUMP_FORWARD	110	/* Number of bytes to skip */
+
 #define JUMP_IF_FALSE_OR_POP 111 /* Target byte offset from beginning
                                     of code */
 #define JUMP_IF_TRUE_OR_POP 112	/* "" */