Re: [Boost-bugs] [Boost C++ Libraries] #5087: test_utf8_codecvt.cpp.patch fixing comparison with wrong type

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5087: test_utf8_codecvt.cpp.patch fixing comparison with wrong type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-01-23 05:04:21

#5087: test_utf8_codecvt.cpp.patch fixing comparison with wrong type
--------------------------------+-------------------------------------------
  Reporter:  hstong@…           |       Owner:  ramey        
      Type:  Patches            |      Status:  new          
 Milestone:  To Be Determined   |   Component:  serialization
   Version:  Boost 1.45.0       |    Severity:  Problem      
Resolution:                     |    Keywords:               
--------------------------------+-------------------------------------------

Comment (by hstong@…):

 The type of `WEOF` according to C99 is `wint_t`.

 `wint_t` is the `int_type` for `char_traits<wchar_t>` as specified by
 C++03.
 As such, it is the return type for `basic_istream<wchar_t>::get()`.

 As per C99, `wint_t` is required to be able to hold an additional value
 (`WEOF`) aside from the ones that `wchar_t` are required to. It follows
 that `WEOF` may not be representable in a `wchar_t`.

 A draft copy of C1x is available here:
 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1494.pdf

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5087#comment:2>
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