Defined in header <cwctype> | ||
|---|---|---|
int iswctype( std::wint_t wc, std::wctype_t desc ); |
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.
| wc | - | the wide character to classify |
| desc | - | the LC_CTYPE category, obtained from a call to std::wctype |
Non-zero if the character wc has the property identified by desc in LC_CTYPE facet of the current C locale, zero otherwise.
#include <clocale>
#include <cwctype>
#include <iostream>
bool classify(wchar_t wc, const std::string& cat)
{
return std::iswctype(wc, 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
| looks up a character classification category in the current C locale (function) |
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C documentation for iswctype |
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