std::iswctype - cppreference.com

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# std::iswctype

From cppreference.com
< cpp‎ | string‎ | wide

Defined in header `<cwctype>` |  |
int iswctype( std::wint_t ch, std::wctype_t desc ); |  |

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 std::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] Example

Run this code

    #include <clocale>
    #include <cwctype>
    #include <iostream>
    bool classify(wchar_t ch, const std::string& cat)
    {
        return std::iswctype(ch, std::wctype(cat.c_str()));
    }
    int main()
    {
        std::setlocale(LC_ALL, "ja_JP.UTF-8");
        std::cout << "The character \u6c34 is...\n";
        for(std::string s : {"digit", "alpha", "space", "cntrl", "jkanji"})
            std::cout << s << "? " << std::boolalpha << classify(L'\u6c34', s) << '\n';
    }

Output:

    The character 水 is...
    digit? false
    alpha? true
    space? false
    cntrl? false
    jkanji? true

### [edit] See also

wctype | looks up a character classification category in the current C locale (function) [edit]

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