std::make_tuple

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Defined in header `<tuple>`

template< class... Types > tuple<VTypes...> make_tuple( Types&&... args );		(since C++11)

Creates a tuple object, deducing the target type from the types of arguments. The deduced types are std::decay<Ti>::type (transformed as if passed to a function by value) unless application of std::decay results in std::reference_wrapper<X> for some type X, in which case the deduced type is is X&.

[edit] Parameters

args

-

zero or more arguments to construct the tuple from

[edit] Return value

A std::tuple object containing the given values.

[edit] Example

#include <iostream>
#include <tuple>
#include <functional>
 
int main()
{
    auto t1 = std::make_tuple(10, "Test", 3.14);
    std::cout << "The value of t1 is "
              << "(" << std::get<0>(t1) << ", " << std::get<1>(t1)
              << ", " << std::get<2>(t1) << ")\n";
 
    int n = 1;
    auto t2 = std::make_tuple(std::ref(n), n);
    n = 7;
    std::cout << "The value of t2 is "
              << "(" << std::get<0>(t2) << ", " << std::get<1>(t2) << ")\n";
}

Output:

The value of t1 is (10, Test, 3.14)
The value of t2 is (7, 1)


tie	creates a `tuple` of lvalue references or unpacks a tuple into individual objects (function template)

forward_as_tuple	creates a `tuple` of rvalue references (function template)

tuple_cat	creates a `tuple` by concatenating any number of tuples (function template)