Namespace
Varianti

<div class="t-tr-text">C + +: concetti<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">C++ concepts:</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div> DefaultConstructible

Da cppreference.com.
< cpp‎ | concept

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C++
 
C + + concetti
Di base
Original:
Basic
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DefaultConstructible
CopyAssignable
CopyConstructible
Biblioteca-Wide
Original:
Library-Wide
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Container
Original:
Container
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Elementi contenitori
Original:
Container Elements
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Iterator
Original:
Iterator
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Numeri casuali
Original:
Random Numbers
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Concorrenza
Original:
Concurrency
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BasicLockable(C++11)
Lockable(C++11)
TimedLockable(C++11)
Mutex(C++11)
TimedMutex(C++11)
Altro
Original:
Other
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Specifica che un esempio del tipo di impostazione predefinita può essere costruita.
Original:
Specifies that an instance of the type can be default constructed.
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[modifica] Requisiti

Il tipo deve implementare le seguenti funzioni:
Original:
The type must implement the following functions:
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Type::Type

Type::Type();

costruttore di default: constructs an instance of a type with default contents.

The following expressions must have the specified effects:

Espressione
Original:
Expression
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 Effects
Type a1;
a1 è default-inizializzato .
Original:
a1 is default-initialized.
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Type a2{};
a2 è valore inizializzato .
Original:
a2 is value-initialized.
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Type{}
Type()
un oggetto temporaneo di Type tipo è valore inizializzato .
Original:
a temporary object of type Type is value-initialized.
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[modifica] Vedi anche

(C++11)
(C++11)
(C++11)
Verifica se un tipo ha un costruttore di default
Original:
checks if a type has a default constructor
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(classe template) [modifica]
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/concept/DefaultConstructible&oldid=25101"