error: wrong number of template arguments (4, should be 2)
 error: template argument 1 is invalid
 error: wrong number of template arguments (2, should be 1) 
 error: template argument 2 is invalid
 error: type/value mismatch at argument 1 in template parameter list for 'template<class ... REST> class TrConcat'
 error: wrong number of template arguments (11, should be 2)
 error: template argument 2 is invalid:
 error: parse error in template argument list
 error: expected '}' before ';' token
 note: to match this '{'
 error: cannot resolve overloaded function 'StylePtr' based on conversion to type 'StyleFactory*'