ctype.xml revision 1.1.1.2 
1<section xmlns="http://docbook.org/ns/docbook" version="5.0" 
2	 xml:id="std.localization.facet.ctype" xreflabel="ctype">
3<?dbhtml filename="ctype.html"?>
4
5<info><title>ctype</title>
6  <keywordset>
7    <keyword>ISO C++</keyword>
8    <keyword>ctype</keyword>
9  </keywordset>
10</info>
11
12
13
14<section xml:id="facet.ctype.impl"><info><title>Implementation</title></info>
15
16
17  <section><info><title>Specializations</title></info>
18    
19
20<para>
21For the required specialization codecvt&lt;wchar_t, char, mbstate_t&gt; ,
22conversions are made between the internal character set (always UCS4
23on GNU/Linux) and whatever the currently selected locale for the
24LC_CTYPE category implements.
25</para>
26
27<para>
28The two required specializations are implemented as follows:
29</para>
30
31<para>
32<code>
33ctype&lt;char&gt;
34</code>
35</para>
36<para>
37This is simple specialization. Implementing this was a piece of cake.
38</para>
39
40<para>
41<code>
42ctype&lt;wchar_t&gt;
43</code>
44</para>
45<para>
46This specialization, by specifying all the template parameters, pretty
47much ties the hands of implementors. As such, the implementation is
48straightforward, involving mcsrtombs for the conversions between char
49to wchar_t and wcsrtombs for conversions between wchar_t and char.
50</para>
51
52<para>
53Neither of these two required specializations deals with Unicode
54characters.
55</para>
56
57  </section>
58</section>
59
60<section xml:id="facet.ctype.future"><info><title>Future</title></info>
61
62
63
64<itemizedlist>
65   <listitem>
66   <para>
67   How to deal with the global locale issue?
68   </para></listitem>
69
70   <listitem>
71   <para>
72   How to deal with different types than char, wchar_t? </para></listitem>
73
74   <listitem><para>
75   Overlap between codecvt/ctype: narrow/widen
76   </para></listitem>
77
78   <listitem>
79     <para>
80       Mask typedef in codecvt_base, argument types in codecvt.  what
81       is know about this type?
82   </para></listitem>
83
84   <listitem>
85   <para>
86   Why mask* argument in codecvt?
87   </para></listitem>
88
89   <listitem>
90     <para>
91       Can this be made (more) generic? is there a simple way to
92       straighten out the configure-time mess that is a by-product of
93       this class?
94   </para></listitem>
95
96   <listitem>
97     <para>
98       Get the ctype&lt;wchar_t&gt;::mask stuff under control. Need to
99       make some kind of static table, and not do lookup every time
100       somebody hits the do_is... functions. Too bad we can't just
101       redefine mask for ctype&lt;wchar_t&gt;
102   </para></listitem>
103
104   <listitem>
105     <para>
106       Rename abstract base class. See if just smash-overriding is a
107       better approach. Clarify, add sanity to naming.
108     </para>
109   </listitem>
110
111</itemizedlist>
112
113
114</section>
115
116
117<bibliography xml:id="facet.ctype.biblio"><info><title>Bibliography</title></info>
118
119
120  <biblioentry>
121    <citetitle>
122      The GNU C Library
123    </citetitle>
124    <author><personname><surname>McGrath</surname><firstname>Roland</firstname></personname></author>
125    <author><personname><surname>Drepper</surname><firstname>Ulrich</firstname></personname></author>
126    <copyright>
127      <year>2007</year>
128      <holder>FSF</holder>
129    </copyright>
130    <pagenums>Chapters 6  Character Set Handling and 7 Locales and Internationalization</pagenums>
131  </biblioentry>
132
133  <biblioentry>
134    <citetitle>
135      Correspondence
136    </citetitle>
137    <author><personname><surname>Drepper</surname><firstname>Ulrich</firstname></personname></author>
138    <copyright>
139      <year>2002</year>
140      <holder/>
141    </copyright>
142  </biblioentry>
143
144  <biblioentry>
145    <citetitle>
146      ISO/IEC 14882:1998 Programming languages - C++
147    </citetitle>
148    <copyright>
149      <year>1998</year>
150      <holder>ISO</holder>
151    </copyright>
152  </biblioentry>
153
154  <biblioentry>
155    <citetitle>
156      ISO/IEC 9899:1999 Programming languages - C
157    </citetitle>
158    <copyright>
159      <year>1999</year>
160      <holder>ISO</holder>
161    </copyright>
162  </biblioentry>
163
164  <biblioentry>
165      <title>
166	<link xmlns:xlink="http://www.w3.org/1999/xlink"
167	      xlink:href="http://www.unix.org/version3/ieee_std.html">
168	The Open Group Base Specifications, Issue 6 (IEEE Std. 1003.1-2004)
169	</link>
170      </title>
171
172    <copyright>
173      <year>1999</year>
174      <holder>
175      The Open Group/The Institute of Electrical and Electronics Engineers, Inc.</holder>
176    </copyright>
177  </biblioentry>
178
179  <biblioentry>
180    <citetitle>
181      The C++ Programming Language, Special Edition
182    </citetitle>
183    <author><personname><surname>Stroustrup</surname><firstname>Bjarne</firstname></personname></author>
184    <copyright>
185      <year>2000</year>
186      <holder>Addison Wesley, Inc.</holder>
187    </copyright>
188    <pagenums>Appendix D</pagenums>
189    <publisher>
190      <publishername>
191	Addison Wesley
192      </publishername>
193    </publisher>
194  </biblioentry>
195
196  <biblioentry>
197    <citetitle>
198      Standard C++ IOStreams and Locales
199    </citetitle>
200    <subtitle>
201      Advanced Programmer's Guide and Reference
202    </subtitle>
203    <author><personname><surname>Langer</surname><firstname>Angelika</firstname></personname></author>
204    <author><personname><surname>Kreft</surname><firstname>Klaus</firstname></personname></author>
205    <copyright>
206      <year>2000</year>
207      <holder>Addison Wesley Longman, Inc.</holder>
208    </copyright>
209    <publisher>
210      <publishername>
211	Addison Wesley Longman
212      </publishername>
213    </publisher>
214  </biblioentry>
215
216</bibliography>
217
218</section>
219