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std::islower<div class="t-tr-text">(スタンダード::ロケール)<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>

提供: cppreference.com
< cpp‎ | locale

 
 
ローカライゼーションライブラリ
ロケールおよびファセット
Original:
Locales and facets
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locale
文字分類
Original:
Character classification
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変換
Original:
Conversions
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ファセットカテゴリの基底クラスです
Original:
Facet category base classes
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ファセットカテゴリ
Original:
Facet categories
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ロケール固有のファセット
Original:
Locale-specific facets
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コー​​ド変換ファセット
Original:
Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
Cロケール
Original:
C locale
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Defined in header <locale>
template< class charT >
bool islower( charT ch, const locale& loc );


指定されたロケールのstd::ctypeファセットで小文字のアルファベット文字として分類され、指定された文字かどうかをチェックします.
Original:
Checks if the given character classified as a lowercase alphabetic character by the given locale's std::ctype facet.
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目次

[編集] パラメータ

ch -
文字
Original:
character
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loc -
ロケール
Original:
locale
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[編集] 値を返します

戻りtrue文字が小文字として分類されている場合、そうでなければfalse.
Original:
Returns true if the character is classified as lowercase, false otherwise.
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[編集] 可能な実装

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

[編集]

異なるロケール(OS固有)とislowerは()の使用方法を示しています.
Original:
Demonstrates the use of islower() with different locales (OS-specific).
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#include <iostream>
#include <locale>
int main()
{
    const wchar_t c = L'\u03c0'; // greek small letter pi
 
    std::locale loc1("C");
    std::cout << "islower('π​', C locale) returned "
               << std::boolalpha << std::islower(c, loc1) << '\n';
 
    std::locale loc2("en_US.UTF8");
    std::cout << "islower('π​', Unicode locale) returned "
              << std::boolalpha << std::islower(c, loc2) << '\n';
}

Output:

islower('π​', C locale) returned false
islower('π​', Unicode locale) returned true

[編集] も参照してください

チェック文字が小文字の場合
Original:
checks if a character is lowercase
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(機能) [edit]
ワイド文字かどうかをチェックするには、小文字です
Original:
checks if a wide character is lowercase
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(機能) [edit]