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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../ranges/../string/wide/iswctype.html below:

std::iswctype - cppreference.com

Classifies the wide character wc using the current C locale's LC_CTYPE category identified by desc.

If the value of wc is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined.

[edit] Parameters wc - the wide character to classify desc - the LC_CTYPE category, obtained from a call to std::wctype [edit] Return value

Non-zero if the character wc has the property identified by desc in LC_CTYPE facet of the current C locale, zero otherwise.

[edit] Example

Output:

The character æ°´ is...
digit? false
alpha? true
space? false
cntrl? false
jkanji? true
[edit] See also

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