std::iswctype
From Cppreference
| C++ Standard Library |
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| Strings library |
| Wide null-terminated strings |
| Template:cpp/string/wide/sidebar content |
| Defined in header <cwctype>
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| int iswctype( std::wint_t ch, std::wctype_t desc );
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Classifies the wide character wc using the current C locale's LC_CTYPE category identified by desc.
Contents |
[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
#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
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looks up a character classification category in the current C locale (function) |
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