[Boost-bugs] [Boost C++ Libraries] #5666: is_class documented as yielding "true" for unions, but documentation contradicts that

Subject: [Boost-bugs] [Boost C++ Libraries] #5666: is_class documented as yielding "true" for unions, but documentation contradicts that
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-06-30 21:19:20

#5666: is_class documented as yielding "true" for unions, but documentation
contradicts that
--------------------------------------------+-------------------------------
 Reporter:  schaub.johannes@…               |       Owner:  matias       
     Type:  Bugs                            |      Status:  new          
Milestone:  To Be Determined                |   Component:  Documentation
  Version:  Boost 1.46.1                    |    Severity:  Problem      
 Keywords:                                  |  
--------------------------------------------+-------------------------------
 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."

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5666>
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