id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
443,no Boolean conversion for boost::rational,Daryle Walker,Jonathan Turkanis,"{{{
The boost::rational class template, in header file <boost/
rational.hpp>, does not support conversion to a Boolean value.  It 
does have an ""operator !"" defined, though.  It is a surprise for a type 
to have one of these operations but not the other.  Currently code 
like ""if ( !r )"" works but not ""if ( r )"", which should be expected.  A 
solution is to add a conversion operator to a type that can be used in 
Boolean contexts, but as little else as possible.  A suggestion is to 
use a pointer-to-member (to data or function) type that is unique to 
each version of boost::rational, where the exact values are private.

}}}",Bugs,closed,,None,None,,Fixed,,