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C++ Locale Library - has_facet

It is used to check if locale has facet and returns whether facet Facet is present in locale loc.

Following is the declaration for std::has_facet.

template <class Facet> bool has_facet (const locale& loc) throw();

template <class Facet> bool has_facet (const locale& loc) noexcept;

loc − It is a locale object.

It returns whether facet Facet is present in locale loc.

No-throw guarantee − this function never throws exceptions.

It has accessed by Argument loc, and the returned object may be used to access facet object.

locale.htm

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