std::is_unsigned
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| ヘッダ <type_traits> で定義
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| template< class T > struct is_unsigned; |
(C++11およびそれ以降) | |
Tは符号なし算術型である場合、メンバーが一定提供value等しいtrueを。その他のタイプのために、valuefalseです.Original:
If
T is an unsigned arithmetic type, provides the member constant value equal true. For any other type, value is false.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
目次 |
std::integral_constant から継承
Member constants
| value [static] |
true T is an unsigned arithmetic type もし、そうでなければfalse Original: true if T is an unsigned arithmetic type , false otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリック静的メンバ定数) |
Member functions
| operator bool |
boolにオブジェクトは、 value返しに変換します Original: converts the object to bool, returns value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) |
Member types
| タイプ
Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Definition |
value_type
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bool
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type
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std::integral_constant<bool, value> |
[編集] 例
#include <iostream> #include <type_traits> class A {}; enum B : unsigned {}; enum class C : unsigned {}; int main() { std::cout << std::boolalpha; std::cout << std::is_unsigned<A>::value << '\n'; std::cout << std::is_unsigned<float>::value << '\n'; std::cout << std::is_unsigned<signed int>::value << '\n'; std::cout << std::is_unsigned<unsigned int>::value << '\n'; std::cout << std::is_unsigned<B>::value << '\n'; std::cout << std::is_unsigned<C>::value << '\n'; }
出力:
false false false true false false
[編集] 参照
| (C++11) |
型が算術型を締結しているかどうかを確認する Original: checks if a type is signed arithmetic type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレート) |
| (C++11) |
タイプかどうかをチェックするには、浮動小数点型である Original: checks if a type is floating-point type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレート) |
| (C++11) |
タイプかどうかをチェックするには、整数型です Original: checks if a type is integral type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレート) |
| (C++11) |
与えられた整数型は符号付きになります Original: makes the given integral type signed The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレート) |
| (C++11) |
与えられた整数型は符号なしになります Original: makes the given integral type unsigned The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレート) |

