28 Text processing library [text]

28.3 Localization library [localization]

28.3.4 Standard locale categories [locale.categories]

28.3.4.3 The numeric category [category.numeric]

28.3.4.3.2 Class template num_get [locale.num.get]

28.3.4.3.2.3 Virtual functions [facet.num.get.virtuals]