Limitations for function and class templates
============================================

   These limitations apply to any use of templates (function templates
or class templates) with GNU C++:

*Template definitions must be visible*
     When you compile code with templates, the template definitions
     must come first (before the compiler needs to expand them), and
     template definitions you use must be visible in the current scope.

*Individual initializers needed for static data*
     Templates for static data in template classes do not work.  
See Limitations for class templates: Class templates.