Add notes that Scalar API is experimental

wesm · wesm · commit 271d60216558 · 2019-02-12T11:13:25.000-06:00
diff --git a/cpp/src/arrow/scalar.h b/cpp/src/arrow/scalar.h
@@ -17,6 +17,9 @@
 
 // Object model for scalar (non-Array) values. Not intended for use with large
 // amounts of data
+//
+// NOTE: This API is experimental as of the 0.13 version and subject to change
+// without deprecation warnings
 
 #pragma once
 
