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Section: 23.2 [char.traits] Status: NAD Editorial Submitter: Dietmar Kühl Opened: 2008-04-23 Last modified: 2016-01-28
Priority: Not Prioritized
View all other issues in [char.traits].
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Discussion:
Paragraph 4 of 23.2 [char.traits] mentions that this
section specifies two specializations (char_traits<char>
and (char_traits<wchar_t>
). However, there are actually
four specializations provided, i.e. in addition to the two above also
char_traits<char16_t>
and char_traits<char32_t>
).
I guess this was just an oversight and there is nothing wrong with just
fixing this.
[ Alisdair adds: ]
char_traits< char16/32_t >
should also be added to<ios_fwd>
in 31.3 [iostream.forward], and all the specializations taking achar_traits
parameter in that header.
[ Sophia Antipolis: ]
Idea of the issue is ok.
Alisdair to provide wording, once that wording arrives, move to review.
[ 2009-05-04 Alisdair adds: ]
The main point of the issue was resolved editorially in N2723, so we are close to NAD Editorial. However, exploring the issue we found a second tweak was necessary for
<iosfwd>
and that is still outstanding, so here are the words I am long overdue delivering:[ Howard: I've put Alisdair's words into the proposed wording section and moved the issue to Review. ]
[ Original proposed wording. ]
Replace paragraph 4 of 23.2 [char.traits] by:
This subclause specifies a struct template,
char_traits<charT>
, and four explicit specializations of it,char_traits<char>
,char_traits<char16_t>
,char_traits<char32_t>
, andchar_traits<wchar_t>
, all of which appear in the header <string> and satisfy the requirements below.
[ Batavia (2009-05): ]
We agree. Move to NAD Editorial.
Proposed resolution:
Change Forward declarations 31.3 [iostream.forward]:
Header
<iosfwd>
synopsisnamespace std { template<class charT> class char_traits; template<> class char_traits<char>; template<> class char_traits<char16_t>; template<> class char_traits<char32_t>; template<> class char_traits<wchar_t>; ... }