std::islower<div class="t-tr-text">(STD :: )<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">:</div><div class="t-tr-dropdown-orig">(std::locale)</div><div class="t-tr-dropdown-notes"> [http://translate.google.com Google].<br/> . [http://en.cppreference.com/w/Cppreference:MachineTranslations ].</div></div></div></div></div>

cppreference.com

< cpp | locale

[]	Google. . , . , . ( . .)

<metanoindex/>

 

C++

(C++20)

(C++20)

(C++11)

(C++20)

/

(C++11)

(C++11)

(C++11)

(C++17)

[edit]

 

has_facet use_facet	locale
ctype_base codecvt_base messages_base	time_base money_base
ctype
ctype ctype_byname ctype<char>	codecvt codecvt_byname
num_get num_put	numpunct numpunct_byname
collate	collate_byname
time_get time_get_byname	time_put time_put_byname
money_get money_put	moneypunct moneypunct_byname
messages	messages_byname
isspace isblank (C++11) iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
toupper tolower	wstring_convert (C++11/17*) wbuffer_convert (C++11/17*)
codecvt_utf8 (C++11/17*) codecvt_utf16 (C++11/17*)	codecvt_utf8_utf16 (C++11/17*) codecvt_mode (C++11/17*)
C
LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME	setlocale localeconv lconv

[edit]

 

<tbody> </tbody>

<locale>
template< class charT > bool islower( charT ch, const locale& loc );

, std::ctype .

:

Checks if the given character classified as a lowercase alphabetic character by the given locale's std::ctype facet.

Google.
. .

ch		: character Google. . .
loc		: locale Google. . .

true, , false .

:

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

Google.
. .

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); }

IsLower () (OS-) .

:

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

Google.
. .

#include <iostream>
#include <locale>
int main()
{
    const wchar_t c = L'\u03c0'; // greek small letter pi

    std::locale loc1("C");
    std::cout << "islower('', C locale) returned "
               << std::boolalpha << std::islower(c, loc1) << '\n';

    std::locale loc2("en_US.UTF8");
    std::cout << "islower('', Unicode locale) returned "
              << std::boolalpha << std::islower(c, loc2) << '\n';
}

:

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

.

islower	, () []
iswlower	, () []

:

• , source
• enclose