Index: src/libcfa/iostream
===================================================================
--- src/libcfa/iostream	(revision 09687aa36e045a9f891425c68a40a1b26dc5f632)
+++ src/libcfa/iostream	(revision 8aa474a522cf439767cfb0cb3720af96323fc04f)
@@ -10,6 +10,6 @@
 // Created On       : Wed May 27 17:56:53 2015
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Wed Dec  6 23:03:30 2017
-// Update Count     : 144
+// Last Modified On : Thu Dec 21 13:55:41 2017
+// Update Count     : 145
 //
 
@@ -55,4 +55,6 @@
 
 // implement writable for intrinsic types
+
+forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype &, _Bool );
 
 forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype &, char );