Compile error with overloaded functions

[Jef Driesen]

I have 4 overloaded functions 'deallocate':

template <typename T> void deallocate(T* mem);
template <typename T> void deallocate(T** mem);
template <typename T> void deallocate(T*** mem);
template <typename T> void deallocate(T**** mem);

When i try to compile code like:

double ***image= allocate<double>(bands, rows, columns);
deallocate(image);

I get the following errors:

error C2667: 'deallocate' : none of 3 overload have a best conversion
error C2668: 'deallocate' : ambiguous call to overloaded function

When I write deallocate<double>(image) or deallocate<>(image), it compiles
without errors.
Why is this necessary? Or is it this only a problem with MSVC6?

 

[Michael Mellor]

I have 4 overloaded functions 'deallocate':

template <typename T> void deallocate(T* mem);
template <typename T> void deallocate(T** mem);
template <typename T> void deallocate(T*** mem);
template <typename T> void deallocate(T**** mem);

When i try to compile code like:

double ***image= allocate<double>(bands, rows, columns);
deallocate(image);

I get the following errors:

error C2667: 'deallocate' : none of 3 overload have a best conversion
error C2668: 'deallocate' : ambiguous call to overloaded function

When I write deallocate<double>(image) or deallocate<>(image), it compiles
without errors.
Why is this necessary? Or is it this only a problem with MSVC6?

It is a problem with MSVC 6.

Michael Mellor