30 Localization library [localization]

30.4 Standard locale categories [locale.categories]

30.4.3 The numeric category [category.numeric]

30.4.3.2 Class template num_­get [locale.num.get]

30.4.3.2.1 General [locale.num.get.general]

namespace std { template<class charT, class InputIterator = istreambuf_iterator<charT>> class num_get : public locale::facet { public: using char_type = charT; using iter_type = InputIterator; explicit num_get(size_t refs = 0); iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, bool& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, long& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, long long& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, unsigned short& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, unsigned int& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, unsigned long& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, unsigned long long& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, float& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, double& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, long double& v) const; iter_type get(iter_type in, iter_type end, ios_base&, ios_base::iostate& err, void*& v) const; static locale::id id; protected: ~num_get(); virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, bool& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, long& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, long long& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, unsigned short& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, unsigned int& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, unsigned long& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, unsigned long long& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, float& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, double& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, long double& v) const; virtual iter_type do_get(iter_type, iter_type, ios_base&, ios_base::iostate& err, void*& v) const; }; }
The facet num_­get is used to parse numeric values from an input sequence such as an istream.