noexcept operator (C + + 11以来)

 

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C + +言語

一般的なトピック Original: General topics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
プリプロセッサ コメント キーワード	ASCIIチャート エスケープシーケンスを の歴史、C + +
フロー制御 Original: Flow control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
条件付き実行文 Original: Conditional execution statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
if statement	switch statement
繰り返し文 Original: Iteration statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
for loop range-for loop (C++11)	while loop do-while loop
文をジャンプします Original: Jump statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
continue statement break statement	goto statement return statement
機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
関数の宣言
ラムダ関数の宣言
関数テンプレート
の歴史。インライン指定
例外仕様 (廃止予定)
noexcept指定子 (C++11)
例外 Original: Exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
式を投げる	try-catchブロック
名前空間 Original: Namespaces The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
名前空間の宣言	名前空間のエイリアス
タイプ Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
基本的なタイプ 複合型 列挙型	union型 関数型
decltype specifier (C++11)
指定子 Original: Specifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
CV指定
貯蔵期間指定
constexprの指定子 (C++11)
自動指定 (C++11)
alignas指定子 (C++11)
初期化 Original: Initialization The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
デフォルトの初期化 値の初期化 ゼロ初期化 初期設定をコピーします 直接初期化	集約の初期化 リストの初期化 (C++11) 定数の初期化 リファレンスの初期化

リテラル Original: Literals The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
整数リテラル 文字リテラル 浮動小数点リテラル 文字列リテラル	ブールリテラル nullptrを (C++11) ユーザーが定義します (C++11)
式 Original: Expressions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
値カテゴリ 評価の順序	演算子 演算子の優先順位
代替表現
ユーティリティ Original: Utilities The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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typedef declaration
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暗黙の型変換
const_cast conversion
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Cスタイルキャストと機能
メモリの割り当て Original: Memory allocation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
new expression	delete expression
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クラス宣言 this pointer 指定子にアクセスします	友人指定子 初期化リスト
クラス固有の機能特性 Original: Class-specific function properties The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
仮想関数 指定子をオーバーライドします (C++11) 最後の子 (C++11)	明示 (C++11) 静的
特殊なメンバ関数 Original: Special member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
デフォルトのコンストラクタです コンストラクタをコピーしてください コンストラクタに移動します (C++11)	割り当てをコピーしてください 割り当てを移動します (C++11) デストラクタです
テンプレート Original: Templates 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
関数テンプレート
テンプレートの特殊化
パラメーターパック (C++11)
その他 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
インラインアセンブリ

 

noexcept演算子は、式が例外をスローしないように宣言されていればtrueを返し、コンパイル時のチェックが実行されます.

Original:

The noexcept operator performs a compile-time check that returns true if an expression is declared to not throw any exceptions.

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それは、関数がいくつかの種類ではなく、他人のために例外をスローすることを宣言するには、関数テンプレートの<div class="t-tr-text"> noexcept指定子

Original:

noexcept specifier

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内で使用することができます.

Original:

It can be used within a function template's

noexcept指定子

Original:

noexcept specifier

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</div> to declare that the function will throw exceptions for some types but not others.

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構文

noexcept( expression )

タイプboolのオブジェクトを返します.

Original:

Returns an object of type bool.

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説明

noexcept演算子はexpressionを評価しません。 falseは以下の潜在的に評価した構築物の少なくともいずれかを含有する場合、結果はexpressionとおりです

Original:

The noexcept operator does not evaluate expression. The result is false if the expression contains at least one of the following potentially evaluated constructs:

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• それは<div class="t-tr-text"> 定数式

  Original:

  constant expression

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  でない限り、非例外をスローする仕様を持たない関数の任意の型に呼び出し.
  Original:

  call to any type of function that does not have non-throwing exception specification, unless it is a

  定数式

  Original:

  constant expression

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  </div>.

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• throw式

  Original:

  throw expression

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• dynamic_cast変換は、実行時チェックを必要とする式

  Original:

  dynamic_cast expression when the conversion needs a run time check

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• typeid式の引数の型がポリモーフィックなクラス型である場合

  Original:

  typeid expression when argument type is polymorphic class type

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他のすべての場合では、結果はtrueです.

Original:

In all other cases the result is true.

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キーワード

noexcept

例

template <class T>
void self_assign(T& t) noexcept(noexcept(T::operator=)) 
{ // self_assign is noexcept if and only if T::operator= is noexcept
    t = t;
}

も参照してください

noexcept指定子	どんな例外(C++11)をスローしないようにする機能を必要とします Original: requires a function to not throw any exceptions (C++11) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
例外仕様	例外は関数(廃止予定)によってスローされるかを指定します Original: specifies what exceptions are thrown by a function (廃止予定) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.