Standard C++ Library Reference ISO/IEC (VERSION3)

has_facet
template<class Facet>
bool has_facet(const locale& loc);
The template function returns true if a locale facet of class Facet is listed within the locale object loc.
isalnum
template<class Elem>
bool isalnum(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: alnum, ch).
isalpha
template<class Elem>
bool isalpha(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: alpha, ch).
iscntrl
template<class Elem>
bool iscntrl(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: cntrl, ch).
isdigit
template<class Elem>
bool isdigit(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: digit, ch).
isgraph
template<class Elem>
bool isgraph(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: graph, ch).
islower
template<class Elem>
bool islower(Elem ch, const locale& loc) const;
The template function returns use_facet< ctype<Elem> >(loc). is(ctype<Elem>:: lower, ch).