Question

I have

class ObjectController
{
public:
...
    template<template<class> class Action, class T>
    Action<T> * createAction(typename Action<T>::CommandFunction cf, T * t)
    {
        return new Action<T>(cf, t);
    }
...
};

and everything works just fine…
But I am used to have only declarations in my classes and definitions in other file… (*.inl for templates)… But when I move this code outside the class ObjectController like this:

class ObjectController
{
public:
...
    template<template<class> class Action, class T>
    Action<T> * createAction(typename Action<T>::CommandFunction cf, T * t);
...
};

template<template<class> class Action, class T>
Action<T> * ObjectController::createAction(typename Action<T>::CommandFunction cf, T * t)
{
    return new Action<T>(cf, t);
}

I get:

unable to match function definition to an existing declaration definition
'Action<T> *gear::core::ObjectController::createAction(Action<T>::CommandFunction,T *)'
existing declarations
'Action<T> *gear::core::ObjectController::createAction(Action<T>::CommandFunction,T *)'

How can I solve it?

edit
when I take exact code from KennyTM (see comments) and paste it to my VS2010 I get the same error… Can somebody confirm it?

Answer 1

It is a bug.
I have submitted it to Microsoft

https://connect.microsoft.com/VisualStudio/feedback/details/724362/unable-to-match-function-definition

The fix should show up in the next release of Visual C++.