std::wctype
Defined in header <cwctype> | | |
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std::wctype_t wctype( const char* str ); | | |
构造类型的值。std::wctype_t描述LC[医]宽字符分类的类型分类。它可能是标准分类类别之一，也可能是特定于地区的类别，例如"jkanji"...
参数
str | - | C string holding the name of the desired category |
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的下列值str在所有C语言环境中都支持：
value of str | effect |
|---|---|
"alnum" | identifies the category used by std::iswalnum |
"alpha" | identifies the category used by std::iswalpha |
"blank" | identifies the category used by std::iswblank (C++11) |
"cntrl" | identifies the category used by std::iswcntrl |
"digit" | identifies the category used by std::iswdigit |
"graph" | identifies the category used by std::iswgraph |
"lower" | identifies the category used by std::iswlower |
"print" | identifies the category used by std::iswprint |
"space" | identifies the category used by std::iswspace |
"upper" | identifies the category used by std::iswupper |
"xdigit" | identifies the category used by std::iswxdigit |
返回值
std::wctype_t对象适合与std::iswctype根据当前C语言环境的命名类别或0 if对宽字符进行分类str不命名当前C语言环境支持的类别。
另见
iswctype | classifies a wide character according to the specified LC_CTYPE category (function) |
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c wctype文档
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