Re: [Boost-bugs] [Boost C++ Libraries] #4669: Lots of warnings from is_unsigned.hpp

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4669: Lots of warnings from is_unsigned.hpp
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-09-21 20:36:47

#4669: Lots of warnings from is_unsigned.hpp
------------------------------------------------+---------------------------
  Reporter:  Per Ola Ingvarsson <pi@…>          |       Owner:  johnmaddock
      Type:  Bugs                               |      Status:  new        
 Milestone:  To Be Determined                   |   Component:  type_traits
   Version:  Boost 1.43.0                       |    Severity:  Problem    
Resolution:                                     |    Keywords:             
------------------------------------------------+---------------------------

Comment (by Per Ola Ingvarsson <skrabban@…>):

 Using gcc-4.2.1, is_unsigned_values (via the macro BOOST_STATIC_CONSTANT)
 becomes:

 template <class T>[[BR]]
 struct is_unsigned_values[[BR]]
 {[[BR]]
    typedef typename remove_cv<T>::type no_cv_t;[[BR]]
    enum { minus_one = (static_cast<no_cv_t>(-1)) };[[BR]]
    enum { zero = (static_cast<no_cv_t>(0)) };[[BR]]
 };

 Using gcc-4.4.5 (debian), it expands to.

 template <class T>[[BR]]
 struct is_unsigned_values[[BR]]
 {[[BR]]
    typedef typename remove_cv<T>::type no_cv_t;[[BR]]
    static const no_cv_t minus_one = (static_cast<no_cv_t>(-1));[[BR]]
    static const no_cv_t zero = (static_cast<no_cv_t>(0));
 };

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4669#comment:1>
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