std::experimental:: nullopt
From cppreference.net
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optional
C++
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nullopt
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Défini dans l'en-tête
<experimental/optional>
|
||
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constexpr
nullopt_t nullopt
{
/*unspecified*/
}
;
|
(library fundamentals TS) | |
std::experimental::nullopt
est une constante de type
std::experimental::nullopt_t
qui est utilisée pour indiquer un type
optional
avec un état non initialisé.
Voir aussi
|
(library fundamentals TS)
|
indicateur de type optionnel avec état non initialisé
(classe) |