iswctype
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header  
<wctype.h>
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|   int iswctype( wint_t ch, wctype_t desc ); 
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Classifies the wide character wc using the current C locale's LC_CTYPE category identified by desc.
[edit] Parameters
| ch | - | the wide character to classify | 
| desc | - | the LC_CTYPE category, obtained from a call to wctype | 
[edit] Return value
Non-zero if the character ch has the property identified by desc in LC_CTYPE facet of the current C locale.
[edit] See also
|    looks up a character classification category in the current C locale  (function)  | 
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