[Boost-bugs] [Boost C++ Libraries] #2903: istarts_with fails when called for a literal widechar string (VS2005 with /Zc:wchar_t-)

Subject: [Boost-bugs] [Boost C++ Libraries] #2903: istarts_with fails when called for a literal widechar string (VS2005 with /Zc:wchar_t-)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-04-01 18:17:13

#2903: istarts_with fails when called for a literal widechar string (VS2005 with
/Zc:wchar_t-)
-----------------------------------------------------+----------------------
 Reporter:  boris.glick_at_[hidden]                |       Owner:  pavol_droba
     Type:  Bugs                                     |      Status:  new        
Milestone:                                           |   Component:  string_algo
  Version:  Boost 1.37.0                             |    Severity:  Problem    
 Keywords:  istarts_with, is_char_ptr, /Zc:wchar_t-  |  
-----------------------------------------------------+----------------------
 When compiled with the flag /Zc:wchar_t-, this call returns false:

 istarts_with(L"Prefix.FollowedByText", L"Prefix")

 The reason, as far as I could determine:

 When /Zc:wchar_t- is defined, range_detail::is_char_ptr(L"Prefix") returns
 false, and as_literal() treats its argument as an array. So boost::end()
 points past the terminating NULL character, and the comparison fails.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2903>
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