std::experimental::optional<T>:: operator bool
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<
cpp
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experimental
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optional
C++
Experimental
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std::experimental::optional
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optional::operator bool
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constexpr
explicit
operator
bool
(
)
const
noexcept
;
|
(ライブラリファンダメンタルTS) | |
* this が値を保持しているかどうかをチェックします。
パラメータ
(なし)
戻り値
true が * this が値を保持している場合、 false が * this が値を保持していない場合を示します。