[facet.ctype.char.statics]
28 Text processing library [text]
28.3 Localization library [localization]
28.3.4 Standard locale categories [locale.categories]
28.3.4.2 The ctype category [category.ctype]
28.3.4.2.4 ctype<char> specialization [facet.ctype.special]
28.3.4.2.4.4 Static members [facet.ctype.char.statics]
static const mask* classic_table() noexcept;