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>

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

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 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
文字分類 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
変換 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)
ファセットカテゴリの基底クラスです 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
ファセットカテゴリ 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
ロケール固有のファセット 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
コー​​ド変換ファセット 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ロケール 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 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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パラメータ

ch	-	文字 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	-	ロケール Original: locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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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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); }

例

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

も参照してください

islower	チェック文字が小文字の場合 Original: checks if a character is lowercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)
iswlower	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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)