std::isalnum<div class="t-tr-text">(STD :: локаль)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::locale)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Локализация библиотеки

Языки и граней 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
Персонаж классификации 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
Преобразования 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)
Facet классов категории базу 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
Facet категорий 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
Язык конкретных аспектов 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
Код аспекты преобразования 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 локали 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

 

Заголовочный файл <locale>
template< class charT > bool isalnum( charT ch, const locale& loc );

Проверяет, является ли данный символ классифицируется как алфавитно-цифровой символ, std::ctype аспект данной локали.

Original:

Checks if the given character classified as an alphanumeric character by the given locale's std::ctype facet.

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Параметры

ch	-	характер Original: character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
loc	-	локали Original: locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

Возврат true, если символ классифицируется как алфавитно-цифровой, false иначе.

Original:

Returns true if the character is classified as alphanumeric, false otherwise.

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Возможная реализация

template< class charT > bool isalnum( charT ch, const std::locale& loc ) { return std::use_facet<std::ctype<charT>>(loc).is(std::ctype_base::alnum, ch); }

Пример

Демонстрирует использование isalnum () с разных языков (OS-специфические) .

Original:

Demonstrates the use of isalnum() with different locales (OS-specific).

The text has been machine-translated via Google Translate.
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#include <iostream>
#include <locale>
int main()
{
    const wchar_t c = L'\u2135'; // mathematical symbol aleph
 
    std::locale loc1("C");
    std::cout << "isalnum('ℵ', C locale) returned "
               << std::boolalpha << std::isalnum(c, loc1) << '\n';
 
    std::locale loc2("en_US.UTF-8");
    std::cout << "isalnum('ℵ', Unicode locale) returned "
              << std::boolalpha << std::isalnum(c, loc2) << '\n';
}

Вывод:

isalpha('ℵ​', C locale) returned false
isalpha('ℵ', Unicode locale) returned true

См. также

isalnum	проверяет, является ли символ алфавитно-цифровым Original: checks if a character is alphanumeric The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
iswalnum	проверяет, является ли широкий символ алфавитно-цифровыми Original: checks if a wide character is alphanumeric The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)