std::make_unique
is a function template which deduces the argument types which are passed to the object constructor. Unfortunately, braced lists are not deducible (with an exception for auto
declarations), and so you cannot instantiate the function template when that missing parameter type.
You can either not use std::make_unique
, but please don’t go that route – you should avoid naked new
s as much as you can, for the children’s sake. Or you can make the type deduction work by specifying the type:
-
std::make_unique<Foo>(std::initializer_list<std::string>({"Hello", "World"}))
-
std::make_unique<Foo, std::initializer_list<std::string>>({"Hello", "World"})
-
auto il = { "Hello"s, "World"s }; auto ptr = std::make_unique<Foo>(il);
The last option uses the special rule for auto
declarations, which (as I hinted above) do in fact deduce an std::initializer_list
.