make_unique how pass complex type as ctor parameter?

Asked May 03 '18 at 16:14

Active May 03 '18 at 16:20

Viewed 141 times

Given the code below:

MyClass::MyClass(std::tuple<int, int> param)
    : mytuple(param){}

tuple<int, int> mt = { 1,2 };
auto myClass = make_unique<MyClass>(mt); // ok
auto myClass1 = make_unique<MyClass>({1,2}); // error
auto myClass01 = make_unique<MyClass>(make_tuple(1,2)); // ok
unique_ptr<MyClass> Myclass2(new MyClass({ 1,2 })); // ok

I get errors:

Error C2660 'std::make_unique': function does not take 1 arguments

Error (active) E0304 no instance of overloaded function "make_unique" matches the argument list

Why is this happening and what I should do?

edited May 03 '18 at 16:20

asked May 03 '18 at 16:14

Dmitry

6

`{1, 2}` has no type and cannot be deduced for `T&&`. – Jarod42 May 03 '18 at 16:16
1

*"What should I do?"* It's not getting any better than `make_unique(make_tuple(1,2));`. – HolyBlackCat May 03 '18 at 16:17
What you should do first is post a complete example, see [mcve]. We can guess what the `MyClass` constructor looks like, but it would be good to have it in the code snippet. – Praetorian May 03 '18 at 16:19
"what I should do?" edit your question to contain [mcve] – Slava May 03 '18 at 16:20

make_unique how pass complex type as ctor parameter?

0 Answers0