[Boost-bugs] [Boost C++ Libraries] #2629: The Integer concept fails for char

Subject: [Boost-bugs] [Boost C++ Libraries] #2629: The Integer concept fails for char
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-01-01 03:57:46

#2629: The Integer concept fails for char
------------------------------------------------+---------------------------
 Reporter:  Joel Lathrop <jal6806_at_[hidden]>      |       Owner:  jsiek        
     Type:  Bugs                                |      Status:  new          
Milestone:  Boost 1.38.0                        |   Component:  concept_check
  Version:  Boost 1.37.0                        |    Severity:  Problem      
 Keywords:  concept_check Integer concept char  |  
------------------------------------------------+---------------------------
 The Integer concept fails for char (e.g.
 BOOST_CONCEPT_ASSERT((Integer<char>)) results in a compiler error).
 However, Section 3.9.1 paragraph 7 of the C++ standard states, "Types
 bool, char, wchar_t, and the signed and unsigned integer types are
 collectively called ''integral'' types.  A synonym for integral type is
 ''integer type''."  So while char is not a signed integer type nor is it
 an unsigned integer type (and therefore is rightly rejected by the
 SignedInteger and UnsignedInteger concepts), it ''is'' an integer type and
 should be accepted by the Integer concept.

 This bug can be easily fixed by adding an instantiation for char to the
 Integer template in concept_check.hpp.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2629>
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