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std::has_facet

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
has_facet
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 Facet >
bool has_facet( const locale& loc );
ロケールlocするかどうかをチェックするには、ファセットFacetを実装しています.
Original:
Checks if the locale loc implements the facet Facet.
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目次

[編集] パラメータ

loc -
クエリへのロケールオブジェクト
Original:
the locale object to query
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[編集] 値を返します

戻りtrueファセットFacetはロケールにインストールされている場合locfalseその他のとき.
Original:
Returns true if the facet Facet was installed in the locale loc, false otherwise.
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[編集] 例外仕様

noexcept specification:  
noexcept
  (C + + 11以来)

[編集]

#include <iostream>
#include <locale>
// minimal custom facet
struct myfacet : public std::locale::facet {
    static std::locale::id id;
};
std::locale::id myfacet::id;
int main()
{
    // loc is a "C" locale with myfacet added
    std::locale loc(std::locale::classic(), new myfacet);
    std::cout << std::boolalpha
              << "Can loc classify chars? "
              << std::has_facet<std::ctype<char>>(loc) << '\n'
              << "Can loc classify char32_t? "
              << std::has_facet<std::ctype<char32_t>>(loc) << '\n'
              << "Does loc implement myfacet? "
              << std::has_facet<myfacet>(loc) << '\n';
}

Output:

Can loc classify chars? true
Can loc classify char32_t? false
Does loc implement myfacet? true

[編集] も参照してください

文化の違いをカプセル化するポリモーフィックなファセットの集合
Original:
set of polymorphic facets that encapsulate cultural differences
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(クラス) [edit]
ロケールからファセットを取得します
Original:
obtains a facet from a locale
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(関数テンプレート) [edit]