[cfe-users] Failed formatted input using std::istream

[Dmitri Shubin]

On 05/07/2013 07:28 PM, David Blaikie wrote:
>
> Seems reasonable to me. Please file a bug at llvm.org/bugs 
> <http://llvm.org/bugs>
>

Filed http://llvm.org/bugs/show_bug.cgi?id=15934

Explanation from Howard Hinnant 
(http://llvm.org/bugs/show_bug.cgi?id=15934#c1):

> libc++ has made no attempt to adhere to C++03, only to C++11.  And unfortunately this detail is a specification that has changed between C++03 and C++11.
>
> The sentence you quote has been removed from this paragraph, which is now 22.4.2.1.2p1 [facet.num.get.virtuals].
>
> Additionally in the same section Stage 3 now says in part:
>
> The numeric value to be stored can be one of:
>
>    * zero, if the conversion function fails to convert the entire field.
>      ios_base::failbit is assigned to err.
>
> So libc++ does conform to C++11, but not C++03.  At this time we have no plans to modify libc++ to strictly adhere to the C++03 standard.

BTW, file the same case against latest libstdc++ -- 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57213
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