I am doing something that is probably silly, but it would be nice if it worked.
I am attempting to specialize types in a way that I need my own lookup structure that is essentially global (but ideally encapsulated as a class variable), but I want the objects to be type safe, so they are parameterized.
Consequently, I have, essentially
template<class T, int N>
class SpecialArray
{
//...
private:
static map<string, internal_t> lookupTable
}
and for whatever reason, I didn't think until such time as I went to initialize lookupTable that when I say
template <class T, int N>
SpecialArray<T,N>::lookupTable;
there are going to be many different lookupTable
s running around attached to the various instantiations of SpecialArray
.
I suspect it may just be a pipe dream and that the correct answer is just making it a separate global singleton object, but is there anyway to make it such that there is just one lookupTable
for all the SpecialArray
s?
Like, in the C++ in my mind (which is not real C++), this would go something like
template <class T, int N>
SpecialArray<*,*>::lookupTable;
... but sadly GCC does not compile the C++ in my mind
Is there any actual way to get what I want (somewhere in C++0x-land or something)? I am likely to run into this problem also with some static methods that manipulate this lookup table (which does not keep track of types or Ns).
... sorry if that didn't make any sense.
Thanks in advance for any help or sympathy you can render.
You could add a non-templated base class and move lookupTable
into that class:
class Base
{
protected:
static map<string, internal_t> lookupTable
};
template<class T, int N>
class SpecialArray : Base
{
//...
};
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With