30 Localization library [localization]

30.4 Standard locale categories [locale.categories]

30.4.3 The numeric category [category.numeric]

30.4.3.3 Class template num_put [locale.nm.put]

30.4.3.3.1 General [locale.nm.put.general]

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namespace std { template<class charT, class OutputIterator = ostreambuf_iterator<charT>> class num_put : public locale::facet { public: using char_type = charT; using iter_type = OutputIterator; explicit num_put(size_t refs = 0); iter_type put(iter_type s, ios_base& f, char_type fill, bool v) const; iter_type put(iter_type s, ios_base& f, char_type fill, long v) const; iter_type put(iter_type s, ios_base& f, char_type fill, long long v) const; iter_type put(iter_type s, ios_base& f, char_type fill, unsigned long v) const; iter_type put(iter_type s, ios_base& f, char_type fill, unsigned long long v) const; iter_type put(iter_type s, ios_base& f, char_type fill, double v) const; iter_type put(iter_type s, ios_base& f, char_type fill, long double v) const; iter_type put(iter_type s, ios_base& f, char_type fill, const void* v) const; static locale::id id; protected: ~num_put(); virtual iter_type do_put(iter_type, ios_base&, char_type fill, bool v) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, long v) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, long long v) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, unsigned long) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, unsigned long long) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, double v) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, long double v) const; virtual iter_type do_put(iter_type, ios_base&, char_type fill, const void* v) const; }; }
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The facet num_put is used to format numeric values to a character sequence such as an ostream.