std::ctype<char>::classic_table
From cppreference.com
                    
                                        
                    < cpp | locale | ctype char
                    
                                                            
                    |   Defined in header  <locale>
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|   static const mask* classic_table() throw();  | 
(until C++11) | |
|   static const mask* classic_table() noexcept;  | 
(since C++11) | |
Returns the classification table that matches the classification used by the minimal "C" locale.
Parameters
(none)
Return value
A pointer to the first element in the classification table (which an array of size std::ctype<char>::table_size)
Notes
Default-constructed std::ctype<char> facets use this table for classification.
Example
| This section is incomplete Reason: no example  |