Pb with template

[poulard]

     Hi all,
     
     sorry if it is not really the place to ask this
     question but I have some pb with template specialization.
     
     
     Assume I have a template class
     
     template <class A, class B, class C>
     class C_TheBaseClass
     
     And now I want to make a partial-specialization with a typdef
     fixing some template argument 
     
     like
     
     template <class A = string, class B, class C = equal_to<string> >
     
     [but this not in the definition of the C_TheBaseClass because
     I want to make more than one with different specialization]
     
     And I would like to use this new template class like
     
     template <class B>
     class C_ThePartial
     
     
     **********************************************************
     
     I tried several things, with typedef and template,
     read the ANSI/ISO C++
     but I have not the response 
     
     may you help me please.
     
     Thx in advance
     
     Herve