STL container as a template parameter [closed]

Answer 1

There are three different kinds of template arguments: values, types, and templates:

template  class C { };
template  class D { };
template  class template_argument> class E { };

When you use these templates you have to provide an argument of the correct kind:

C<3> c;
D d;
E e;

When you use the third form, a template template argument, the template passed as the argument must match the declaration of the template template argument. In my simple examples, the template E expects a template template argument that takes one type argument.

In the code in the question, the first argument in the declaration of Foobar is template class TContainer. At the point where it's used, the template that's passed is std::vector:

Foobar bla(v);

The problem is that the template template argument says that it should have one argument, but the template that's passed as the actual argument has two or more. Formally, std::vector is

template > class vector { ... };

In order to use std::vector> as the first argument toFoobar, the definition ofFoobar` needs to be changed so that the first argument takes two type arguments:

template  TContainer, class TObject> class Foobar { ... };