id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5666	"is_class documented as yielding ""true"" for unions, but documentation contradicts that"	schaub.johannes@…	John Maddock	"The is_class documentation at http://www.boost.org/doc/libs/1_46_1/libs/type_traits/doc/html/boost_typetraits/reference/is_class.html says

   ""Inherits: If T is a (possibly cv-qualified) class type then inherits from true_type, otherwise inherits from false_type""

This means that is_class shall be derived from true_type if T is an union, because an union is a class type. But the ""Compiler Compatibility"" section contains some really confusing text:

   ""Without (some as yet unspecified) help from the compiler, we cannot distinguish between union and class types, as a result this type will erroneously inherit from true_type for union types.""
"	Patches	closed	Boost 1.48.0	type_traits	Boost 1.46.1	Problem	fixed