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1 424 jeremybenn
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      ISO C++
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      ctype
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ctype
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Implementation
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    Specializations
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For the required specialization codecvt<wchar_t, char, mbstate_t> ,
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conversions are made between the internal character set (always UCS4
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on GNU/Linux) and whatever the currently selected locale for the
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LC_CTYPE category implements.
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The two required specializations are implemented as follows:
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ctype<char>
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This is simple specialization. Implementing this was a piece of cake.
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ctype<wchar_t>
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This specialization, by specifying all the template parameters, pretty
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much ties the hands of implementors. As such, the implementation is
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straightforward, involving mcsrtombs for the conversions between char
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to wchar_t and wcsrtombs for conversions between wchar_t and char.
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Neither of these two required specializations deals with Unicode
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characters.
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Future
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   How to deal with the global locale issue?
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   How to deal with different types than char, wchar_t?
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   Overlap between codecvt/ctype: narrow/widen
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       Mask typedef in codecvt_base, argument types in codecvt.  what
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       is know about this type?
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   Why mask* argument in codecvt?
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       Can this be made (more) generic? is there a simple way to
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       straighten out the configure-time mess that is a by-product of
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       this class?
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       Get the ctype<wchar_t>::mask stuff under control. Need to
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       make some kind of static table, and not do lookup every time
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       somebody hits the do_is... functions. Too bad we can't just
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       redefine mask for ctype<wchar_t>
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       Rename abstract base class. See if just smash-overriding is a
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       better approach. Clarify, add sanity to naming.
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Bibliography
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    </code></pre></td>
      </tr>
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         <td>125</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>      The GNU C Library</code></pre></td>
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         <td>126</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>
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      McGrath
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      Roland
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      Drepper
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      Ulrich
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      2007
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      FSF
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    Chapters 6  Character Set Handling and 7 Locales and Internationalization
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    </code></pre></td>
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         <td>144</td>
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         <td class="code"><pre><code>      Correspondence</code></pre></td>
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         <td>145</td>
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         <td></td>
         <td class="code"><pre><code>
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      Drepper
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      Ulrich
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      2002
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    </code></pre></td>
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         <td>158</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>      ISO/IEC 14882:1998 Programming languages - C++</code></pre></td>
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         <td>159</td>
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         <td></td>
         <td class="code"><pre><code>
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      1998
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      ISO
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    </code></pre></td>
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         <td>168</td>
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         <td></td>
         <td class="code"><pre><code>      ISO/IEC 9899:1999 Programming languages - C</code></pre></td>
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         <td>169</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>
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      1999
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      ISO
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          The Open Group Base Specifications, Issue 6 (IEEE Std. 1003.1-2004)
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      1999
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      The Open Group/The Institute of Electrical and Electronics Engineers, Inc.
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    </code></pre></td>
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      <tr valign="middle">
         <td>193</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>      The C++ Programming Language, Special Edition</code></pre></td>
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         <td>194</td>
         <td></td>
         <td></td>
         <td class="code"><pre><code>
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      Stroustrup
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      Bjarne
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      2000
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      Addison Wesley, Inc.
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    Appendix D
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        Addison Wesley
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    </code></pre></td>
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         <td>213</td>
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         <td></td>
         <td class="code"><pre><code>      Standard C++ IOStreams and Locales</code></pre></td>
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         <td>214</td>
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         <td></td>
         <td class="code"><pre><code>
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      Advanced Programmer's Guide and Reference
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      Langer
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      Angelika
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      Kreft
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      Klaus
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      2000
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      Addison Wesley Longman, Inc.
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        Addison Wesley Longman
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