27 Localization library [localization]

27.4 Standard locale categories [locale.categories]

27.4.1 The ctype category [category.ctype]

27.4.1.1 Class template ctype [locale.ctype]

27.4.1.1.1 ctype members [locale.ctype.members]

bool is(mask m, charT c) const; const charT* is(const charT* low, const charT* high, mask* vec) const;
Returns: do_­is(m, c) or do_­is(low, high, vec).
const charT* scan_is(mask m, const charT* low, const charT* high) const;
Returns: do_­scan_­is(m, low, high).
const charT* scan_not(mask m, const charT* low, const charT* high) const;
Returns: do_­scan_­not(m, low, high).
charT toupper(charT) const; const charT* toupper(charT* low, const charT* high) const;
Returns: do_­toupper(c) or do_­toupper(low, high).
charT tolower(charT c) const; const charT* tolower(charT* low, const charT* high) const;
Returns: do_­tolower(c) or do_­tolower(low, high).
charT widen(char c) const; const char* widen(const char* low, const char* high, charT* to) const;
Returns: do_­widen(c) or do_­widen(low, high, to).
char narrow(charT c, char dfault) const; const charT* narrow(const charT* low, const charT* high, char dfault, char* to) const;
Returns: do_­narrow(c, dfault) or do_­narrow(low, high, dfault, to).