std::piecewise_construct

 

C++

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Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

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std::pair

Membri funzioni Original: Member functions 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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operator= operator!= operator< operator<= operator> operator>=

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constexpr piecewise_construct_t piecewise_construct = std::piecewise_construct_t();		(dal C++11)

Il std::piecewise_construct costante è un'istanza di un tipo di tag vuoto struct std::piecewise_construct_t.

Original:

The constant std::piecewise_construct is an instance of an empty struct tag type std::piecewise_construct_t.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Esempio

#include <iostream>#include <utility>#include <tuple>   struct Foo { Foo(std::tuple<int, float>){std::cout<<"Constructed a Foo from a tuple\n";} Foo(int, float){std::cout<<"Constructed a Foo from an int and a float\n";}};   int main(){std::tuple<int, float> t(1, 3.14);std::pair<Foo, Foo> p1(t, t);std::pair<Foo, Foo> p2(std::piecewise_construct, t, t);}

Output:

Constructed a Foo from a tuple Constructed a Foo from a tuple Constructed a Foo from an int and a float Constructed a Foo from an int and a float

Vedi anche

piecewise_construct_t (C++11)	tipo di tag utilizzato per selezionare la funzione di sovraccarico corretta per la costruzione a tratti Original: tag type used to select correct function overload for piecewise construction The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)