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### 2019. `isblank` not supported by `std::locale`

Section: 28.3.3.1 [classification] Status: C++11 Submitter: Jonathan Wakely Opened: 2010-11-16 Last modified: 2016-01-28

Priority: Not Prioritized

View all issues with C++11 status.

Discussion:

C99 added `isblank` and `iswblank` to `<locale.h>` but `<locale>` does not provide any equivalent.

[2011-02-24 Reflector discussion]

Moved to Tentatively Ready after 6 votes.

Proposed resolution:

Add to 28.3.3.1 [classification] synopsis:

>     template <class charT> bool isgraph (charT c, const locale& loc);
>     template <class charT> bool isblank (charT c, const locale& loc);

Add to 28.4.2 [category.ctype] synopsis:

>     static const mask xdigit = 1 << 8;
>     static const mask blank = 1 << 9;
>     static const mask alnum = alpha | digit;
>     static const mask graph = alnum | punct;