[PATCH] [libc++] Check the support of default function template args.
tzuhsiang.chien at gmail.com
Wed Jan 8 08:10:13 PST 2014
On Mon, Jan 6, 2014 at 10:01 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:
> Summary: This patch is a part of the efforts (and the last one) to make
> g++ being able to compile libc++ *headers* in C++98 mode. This patch
> removes the default function template arguments in <memory> and preserve
> SFINAE by moving enable_if<> to function return type or argument type.
> For example,
> - template <class _Pp,* class = typename enable_if<...>*>
> - _LIBCPP_INLINE_VISIBILITY explicit unique_ptr(_Pp __p) _NOEXCEPT
> is changed to:
> + template <class _Pp>
> + _LIBCPP_INLINE_VISIBILITY explicit unique_ptr(_Pp __p,
> + *typename enable_if<..., __nat>::type = __nat()*) _NOEXCEPT
> Please have a look. Thanks.
> On Sat, Dec 28, 2013 at 1:54 AM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:
>> Hi Howard,
>> I am doing some experiment to replace stlport with libc++ in the Android
>> platform, which does not have libstdc++. Although I can compile the libc++
>> library itself with clang, I can't build the world with clang at the
>> moment. Thus, I wish to make the C++98/03 headers compatible with g++, so
>> that I can include them without problems.
>> On Sat, Dec 28, 2013 at 1:05 AM, Howard Hinnant <howard.hinnant at gmail.com
>> > wrote:
>>> Hi Logan,
>>> Could you comment on the motivation for using g++ + libc++. I.e., why
>>> use libc++ instead of the libstdc++ that comes bundled with g++?
>>> On Dec 26, 2013, at 11:08 AM, Logan Chien <tzuhsiang.chien at gmail.com>
>>> > Ping.
>>> > On Fri, Dec 20, 2013 at 10:53 PM, Logan Chien <
>>> tzuhsiang.chien at gmail.com> wrote:
>>> > Ping. Any further comments?
>>> > This patch tries to reduce the usage of the default function template
>>> arguments, which is not supported in pre-C++0x. Without this change, we
>>> will get compilation error from g++ if we tries to include libc++ headers
>>> in pre-C++0x mode.
>>> > To remove the usage of default function template arguments, the patch
>>> moves the enable_if<> to return type or the function argument types. This
>>> pattern is used in the other code of libc++ as well.
>>> > Please let me know if you have any comments. Thanks.
>>> > Sincerely,
>>> > Logan
>>> > _______________________________________________
>>> > cfe-commits mailing list
>>> > cfe-commits at cs.uiuc.edu
>>> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the cfe-commits