nested class in a template

[John Goche]

Hello,

Consider the following example:

template <class T>
class A {
private:
T foo;
public:
T Foo() { return foo; }
class B {
private:
T bar;
public:
void FooBar();
T Bar() { return 2 * bar; }
};
};

template <class T>
A<T>::B::FooBar() { }

upong compiling I get the following error:

'typename' is missing in template argument dependent qualified type

which goes away when I type

typename template <class T>
A<T>::B::FooBar() { }

I do not understand why the compiler is confused about A<T>::B being a
type?
What else could it be?

Thanks,

JG

[Bo Persson]

John Goche wrote:

Hello,

Consider the following example:

template <class T>
class A {
private:
T foo;
public:
T Foo() { return foo; }
class B {
private:
T bar;
public:
void FooBar();
T Bar() { return 2 * bar; }
};
};

template <class T>
A<T>::B::FooBar() { }

upong compiling I get the following error:

'typename' is missing in template argument dependent qualified type

which goes away when I type

typename template <class T>
A<T>::B::FooBar() { }

I do not understand why the compiler is confused about A<T>::B being
a
type?
What else could it be?

A qualifier for a function name? :-)

I think the type that is missing is 'void', the return type of FooBar.
Bo Persson