On Sun, Jul 26, 2015 at 10:02 PM, John Maddock wrote:

On 26/07/2015 16:33, Andrey Semashev wrote:

...

Hi,

I see that BOOST_NO_CXX11_HDR_CODECVT is not defined for MSVC-14, although it is known that the codecvt facets are unusable because of linkin errors:

https://connect.microsoft.com/VisualStudio/feedback/details/1348277/link-err...

You can also see STL mentioning DevDiv#1060849 here:

http://blogs.msdn.com/b/vcblog/archive/2014/11/12/visual-studio-2015-preview...

and I can see that the problem is not fixed in RTM. This also concerns std::codecvt specializations for char16_t and char32_t.

Can we define the BOOST_NO_CXX11_HDR_CODECVT macro for MSVC?

Investigating.... looks like a regression from VC12?

It seems so. The following test fails to link with VC14 and succeeds with VC10, 11 and 12. #include <cstddef> #include <locale> #include <codecvt> #include <iostream> int main() { std::locale loc; std::cout << "Has codecvt: " << std::has_facet< std::codecvt< char16_t, char, std::mbstate_t > >(loc) << std::endl; std::cout << "Has codecvt: " << std::has_facet< std::codecvt< char32_t, char, std::mbstate_t > >(loc) << std::endl; loc = std::locale(loc, new std::codecvt_utf8< wchar_t >()); loc = std::locale(loc, new std::codecvt_utf8< char16_t >()); loc = std::locale(loc, new std::codecvt_utf8< char32_t >()); loc = std::locale(loc, new std::codecvt_utf16< wchar_t >()); loc = std::locale(loc, new std::codecvt_utf16< char16_t >()); loc = std::locale(loc, new std::codecvt_utf16< char32_t >()); loc = std::locale(loc, new std::codecvt_utf8_utf16< wchar_t >()); loc = std::locale(loc, new std::codecvt_utf8_utf16< char16_t >()); loc = std::locale(loc, new std::codecvt_utf8_utf16< char32_t >()); return 0; }

On 27.07.2015 13:28, John Maddock wrote:

...

...

Investigating.... looks like a regression from VC12? It seems so. The following test fails to link with VC14 and succeeds with VC10, 11 and 12.

Fix pushed to develop, John.

Thank you. Will it make it to 1.59?

[Andrey Semashev]

You can also see STL mentioning DevDiv#1060849 here: http://blogs.msdn.com/b/vcblog/archive/2014/11/12/visual-studio-2015-preview... and I can see that the problem is not fixed in RTM. This also concerns std::codecvt specializations for char16_t and char32_t. Can we define the BOOST_NO_CXX11_HDR_CODECVT macro for MSVC?

[John Maddock]

Investigating.... looks like a regression from VC12?

Technically, this isn't a regression because 2013 lacked char16_t/char32_t as real types. The STL (unwisely) provided fake typedefs. I need to figure out how to provide real char16_t/char32_t specializations, but this is not planned for any 2015 Updates. STL