dictionary: Introduce SPLIT_NONE for dictionaries without split variables.

[pspp] / src / data / dictionary.h

diff --git a/src/data/dictionary.h b/src/data/dictionary.h
index abc00062f198033f80555fe3fd0a229413af6a75..e9e203add068f1971cbd745fbd35f0c7ac1a8a8c 100644 (file)
--- a/src/data/dictionary.h
+++ b/src/data/dictionary.h
@@ -125,9 +125,12 @@ void dict_compact_values (struct dictionary *);
 struct caseproto *dict_get_compacted_proto (const struct dictionary *,
                                             unsigned int exclude_classes);
 
-/* SPLIT FILE variables. */
+/* SPLIT FILE variables.
+
+   SPLIT_NONE is used if and only if there are no split file variables. */
 enum split_type
   {
+    SPLIT_NONE,                 /* No split file variables. */
     SPLIT_SEPARATE,             /* Produce separate output for each split. */
     SPLIT_LAYERED,              /* Output splits in same table.  */
   };