<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> ValueSwappable

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

C + + concetti

Di base Original: Basic The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
DefaultConstructible CopyAssignable CopyConstructible	MoveAssignable (C++11) MoveConstructible (C++11) Destructible
Biblioteca-Wide Original: Library-Wide The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
EqualityComparable LessThanComparable Swappable (C++11) ValueSwappable (C++11)	NullablePointer (C++11) Hash (C++11) Allocator
Container Original: Container The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Container SequenceContainer ReversibleContainer	AssociativeContainer AllocatorAwareContainer UnorderedAssociativeContainer (C++11)
Elementi contenitori Original: Container Elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
CopyInsertable (C++11) MoveInsertable (C++11)	EmplaceConstructible (C++11)
Iterator Original: Iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Iterator OutputIterator InputIterator	ForwardIterator BidirectionalIterator RandomAccessIterator
Numeri casuali Original: Random Numbers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
SeedSequence (C++11) RandomNumberEngine (C++11)	RandomNumberDistribution (C++11) UniformRandomNumberGenerator (C++11) RandomNumberEngineAdaptor (C++11)
Concorrenza Original: Concurrency The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11)	Mutex (C++11) TimedMutex (C++11)
Altro Original: Other The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
CharTraits pos_type off_type Clock (C++11)	UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) TrivialClock (C++11)

 

Due oggetti di questo tipo possono essere dereferenziati ed i valori risultanti possono essere scambiati con non qualificato swap() chiamata di funzione nel contesto in cui sia std::swap e definiti dall'utente swap()s sono visibili.

Original:

Two objects of this type can be dereferenced and the resulting values can be swapped using unqualified function call swap() in the context where both std::swap and the user-defined swap()s are visible.

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Requisiti

Tipo T è ValueSwappable se

Original:

Type T is ValueSwappable if

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1)

T Tipo soddisfa i requisiti Iterator

Original:

Type T satisfies the Iterator requirements

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2)

Per qualsiasi oggetto x dereferencable di T tipo (vale a dire, un valore diverso l'iteratore fine), *x soddisfa i requisiti Swappable.

Original:

For any dereferencable object x of type T (that is, any value other than the end iterator), *x satisfies the Swappable requirements.

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Molte funzioni della libreria standard aspettano che i loro argomenti per soddisfare ValueSwappable, il che significa che ogni volta che la libreria standard esegue una di swap, utilizza l'equivalente di usingstd::swap; swap(*iter1, *iter2):.

Original:

Many standard library functions expect their arguments to satisfy ValueSwappable, which means that any time the standard library performs a swap, it uses the equivalent of usingstd::swap; swap(*iter1, *iter2):.

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Esempio

#include <iostream>#include <vector>   class IntVector {std::vector<int> v; IntVector& operator=(IntVector);// not assignablepublic:void swap(IntVector& other){ v.swap(other.v);}};void swap(IntVector& v1, IntVector& v2){ v1.swap(v2);}   int main(){ IntVector v1, v2;// IntVector is Swappable, but not MoveAssignable IntVector* p1 =&v1; IntVector* p2 =&v2;// IntVector* is ValueSwappablestd::iter_swap(p1, p2);// OK: iter_swap requires ValueSwappable// std::swap(v1, v2); // compiler error! std::swap requires MoveAssignable}