[Boost-bugs] [Boost C++ Libraries] #4485: boost.filesysten v3 breaks boost:::iostream::mapped_file

Subject: [Boost-bugs] [Boost C++ Libraries] #4485: boost.filesysten v3 breaks boost:::iostream::mapped_file
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-07-29 08:00:17

#4485: boost.filesysten v3 breaks boost:::iostream::mapped_file
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 Reporter:  ttan@…                               |       Owner:         
     Type:  Patches                              |      Status:  new    
Milestone:  Boost 1.44.0                         |   Component:  None   
  Version:  Boost Development Trunk              |    Severity:  Problem
 Keywords:  filesysten v3  iostream mapped_file  |  
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 boost:::iostream::mapped_file has been design so that when passing file
 path to the constructor or open(), it only accepts 3 types: std::string,
 boost::filesystem::path, boost::filesystem::wpath.

 due to the late update to boost::filesystem v3, boost::filesystem::path is
 no longer templated, and wpath is gone.
 and as Windows uses UTF16, when a path is converted from utf16 to a
 certain ANSI/OEM code page(CP), causes information loss, for example,
 "Apress ©" in unicode would be converted to "Apress ?" in CP936, where
 code point 0x00a9(©) is lost, though it's a legal character in file name.

 it amounts to that support for std::wstring in
 boost:::iostream::mapped_file is gone.

 a patch is needed to remove the dependence on boost.filesystem v2, and
 revert to the support of std::wstring,  which can be get from
 path.wstring() in boost::filesystem v3.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/4485>
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