std::ctype_byname<char>

 

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正则表达式库 （C++11）

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本地化库

语言环境方面 Original: Locales and facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
locale
use_facet	has_facet
字符分类 Original: Character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isspace isblank （C++11） iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
转换 Original: Conversions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
toupper tolower	wstring_convert （C++11） wbuffer_convert （C++11）
小面类的基类 Original: Facet category base classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype_base codecvt_base messages_base	time_base money_base
小面类 Original: Facet categories The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype ctype<char> codecvt collate messages time_get time_put	num_get num_put numpunct money_get money_put moneypunct
特定于语言环境的方面 Original: Locale-specific facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype_byname ctype_byname<char> codecvt_byname messages_byname collate_byname	time_get_byname time_put_byname numpunct_byname moneypunct_byname
代码转换方面 Original: Code conversion facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
codecvt_utf8 （C++11） codecvt_utf16 （C++11）	codecvt_utf8_utf16 （C++11） codecvt_mode （C++11）
C语言环境 Original: C locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setlocale localeconv lconv	LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME

 

Defined in header <locale>
template<> class ctype_byname : public std::ctype<char>;

这种专业化的std::ctype_byname封装类型char的字符分类功能。喜欢它的基类std::ctype<char>与通用std::ctype_byname，表查找，分类字符

Original:

This specialization of std::ctype_byname encapsulates character classification features for type char. Like its base class std::ctype<char> and unlike general-purpose std::ctype_byname, table lookup is used to classify characters

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

会员类型

会员类型 Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
mask	ctype<char>::mask

成员函数

(constructor)	构造一个新的ctype_byname <Char>来方面 Original: constructs a new ctype_byname<char> facet The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）
(destructor)	解构一个ctype_byname <Char>来方面 Original: destructs a ctype_byname<char> facet The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （受保护的成员函数）

Inherited from std::ctype<char>

Member types

会员类型 Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
char_type	char

Member objects

会员名称 Original: Member name The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Type
id （静态的）	std::locale::id
table_size （静态常量）	std::size_t大小的分类表，至少256 Original: std::size_t size of the classification table, at least 256 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Member functions

table	得到的字符分类表 Original: obtains the character classification table The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype<char>）
classic_table [静态的] </ SPAN></div></div>	获得“C”区域设置字符分类表 Original: obtains the "C" locale character classification table The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员函数of std::ctype<char>）
is	分类的字符或字符序列时，使用的分类表 Original: classifies a character or a character sequence, using the classification table The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype<char>）
scan_is	找到的第一个字符序列中符合给定的分类，使用的分类表 Original: locates the first character in a sequence that conforms to given classification, using the classification table The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype<char>）
scan_not	locates the first character in a sequence that fails given classification, using the classification table （公共成员函数of std::ctype<char>）
toupper	调用do_toupper Original: invokes do_toupper The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype）
tolower	调用do_tolower Original: invokes do_tolower The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype）
widen	调用do_widen Original: invokes do_widen The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype）
narrow	调用do_narrow Original: invokes do_narrow The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数of std::ctype）

Protected member functions

do_toupper [虚拟的] </ SPAN></div></div>	将一个或多个字符转换为大写 Original: converts a character or characters to uppercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数of std::ctype）
do_tolower [虚拟的] </ SPAN></div></div>	一个或多个字符转换为小写 Original: converts a character or characters to lowercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数of std::ctype）
do_widen [虚拟的] </ SPAN></div></div>	将一个或多个字符从charcharT Original: converts a character or characters from char to charT The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数of std::ctype）
do_narrow [虚拟的] </ SPAN></div></div>	将一个或多个字符从charTchar Original: converts a character or characters from charT to char The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数of std::ctype）

</div>

Inherited from std::ctype_base

Member types

类型 Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
mask	未指定的位掩码类型（枚举，整数类型，或bitset的） Original: unspecified bitmask type (enumeration, integer type, or bitset) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Member constants

space [静态的] </ SPAN></div></div>	mask识别的空白字符分类 Original: the value of mask identifying whitespace character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
print [静态的] </ SPAN></div></div>	mask确定可打印字符分类的价值 Original: the value of mask identifying printable character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
cntrl [静态的] </ SPAN></div></div>	mask识别控制字符分类 Original: the value of mask identifying control character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
upper [静态的] </ SPAN></div></div>	mask确定的价值大写字符分类 Original: the value of mask identifying uppercase character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
lower [静态的] </ SPAN></div></div>	值mask识别小写字母分类 Original: the value of mask identifying lowercase character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
alpha [静态的] </ SPAN></div></div>	mask识别英文字母分类的价值 Original: the value of mask identifying alphabetic character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
digit [静态的] </ SPAN></div></div>	mask识别数字字符分类的价值 Original: the value of mask identifying digit character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
punct [静态的] </ SPAN></div></div>	mask识别的标点字符分类 Original: the value of mask identifying punctuation character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
xdigit [静态的] </ SPAN></div></div>	mask识别十六进制数字字符分类的价值 Original: the value of mask identifying hexadecimal digit character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
blank [静态的] </ SPAN> （C++11）</div></div>	mask识别空白字符分类的价值 Original: the value of mask identifying blank character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员常量）
alnum [静态的] </ SPAN></div></div>	alpha | digit （公共静态成员常量）
graph [静态的] </ SPAN></div></div>	alnum | punct （公共静态成员常量）

</div>

为例

#include <iostream>
#include <locale>
 
int main()
{
    char c = '\xde'; // capital letter thorn
 
    std::locale loc("C");
 
    std::cout << "isupper('Þ', C locale) returned "
               << std::boolalpha << std::isupper(c, loc) << '\n';
 
    loc = std::locale(loc, new std::ctype_byname<char>("en_US.utf8"));
 
    std::cout << "isupper('Þ', C locale with Unicode ctype<char>) returned "
              << std::boolalpha << std::isupper(c, loc) << '\n';
 
    loc = std::locale(loc, new std::ctype_byname<char>("is_IS.iso88591"));
 
    std::cout << "isupper('Þ', C locale with Islandic ctype<char>) returned "
              << std::boolalpha << std::isupper(c, loc) << '\n';
}

Output:

isupper('Þ', C locale) returned false
isupper('Þ', C locale with Unicode ctype<char>) returned false
isupper('Þ', C locale with Islandic ctype<char>) returned true

另请参阅

ctype	定义字符分类表 Original: defines character classification tables The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （类模板）
ctype<char>	专业化的类型std::ctypechar Original: specialization of std::ctype for type char The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （类模板专业化）