Template default arguments

Question

If I am allowed to do the following:

template 
class Foo{
};

Why am I not allowed to do the following in main?

Answer 1

You have to do:

Foo<> me;

The template arguments must be present but you can leave them empty.

Think of it like a function foo with a single default argument. The expression foo won't call it, but foo() will. The argument syntax must still be there. This is consistent with that.