[Boost-users] Templates Question

From: Surya Kiran Gullapalli (skg_at_[hidden])
Date: 2005-10-27 02:41:37

Hi,
I'm writing a templated class, and i dont want to use the class 
otherthan for some predetermined types, say, int, double etc.

This class has no meaning for typenames other than those few.

=========================
template <class T>
myClass {....} ;

myClass<int> intClass ;
myClass<float> floatClass ;
myClass<char> charClass ;
=========================

The compiler should not complain for the first 2 instantiations, but 
should bail out at the 3rd instantiation (charClass). Is there any way i 
can achieve this, using standard c++ or boost.

I've tried explicit template instantiation, (by passing a flag to my 
compiler), but in that case, i've to do that for every class

suppose i try to invoke
std::vector <someOtherClass> someVector;

I've to instantiate this also explicitly. (which is a problem for me, 
because, I use a lot of standard library, and its a pain for me to 
instantiate  every time.

Also, if i do the above, i can always instantiate myClass also like this.

template class myClass <someOtherClass> ;

and which i want to avoid this..

to summarize my question,
is there any way i can restrict the compiler to accept only few type 
names for my templated class (i.e., using standard c++ or boost)

Thanks,
Surya