HelenOS sources

do_is             150 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual bool do_is(mask m, char_type c) const
do_is             156 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual const char_type* do_is(const char_type* low, const char_type high,
do_is             345 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual bool do_is(mask m, char_type c) const
do_is             361 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual const char_type* do_is(const char_type* low, const char_type* high,
do_is             529 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual bool do_is(mask m, char_type c) const
do_is             535 uspace/lib/cpp/include/__bits/locale/ctype.hpp             virtual const char_type* do_is(const char_type* low, const char_type* high,
HelenOS homepage, sources at GitHub