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2019. isblank not supported by std::locale

Section: [classification] Status: C++11 Submitter: Jonathan Wakely Opened: 2010-11-16 Last modified: 2016-02-10

Priority: Not Prioritized

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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 [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;