Index: src/libcfa/rational
===================================================================
--- src/libcfa/rational	(revision 561f7308676f4263e3d2c5d41e9c1cf1d336fd5f)
+++ src/libcfa/rational	(revision 8905f56fc5f7139d6950e2991a2f75da89c7be36)
@@ -12,6 +12,6 @@
 // Created On       : Wed Apr  6 17:56:25 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sun May 14 16:49:13 2017
-// Update Count     : 78
+// Last Modified On : Mon May 15 21:30:12 2017
+// Update Count     : 90
 //
 
@@ -128,8 +128,8 @@
 
 // conversion
-// forall ( otype RationalImpl | arithmetic( RationalImpl ) )
-// double widen( Rational(RationalImpl) r );
-// forall ( otype RationalImpl | arithmetic( RationalImpl ) )
-// Rational(RationalImpl) narrow( double f, RationalImpl md );
+forall ( otype RationalImpl | arithmetic( RationalImpl ) | { double convert( RationalImpl ); } )
+double widen( Rational(RationalImpl) r );
+forall ( otype RationalImpl | arithmetic( RationalImpl ) | { double convert( RationalImpl );  RationalImpl convert( double );} )
+Rational(RationalImpl) narrow( double f, RationalImpl md );
 
 // I/O