c++ - Why can I not call templated method of templated class from a templated function -

possible duplicate:
confusing template error

i have templated class templated method. have function, 2 template arguments creating class first template argument , calling function second. consider example:

template<class s> class { public:     template<class t>             t f1() {                     return (t)0.0;             }  };  template<class t,class ct> void function() {     a<t> a;     a.f1<ct>(); // gcc error in line } 

gcc gived me:

error: expected primary-expression before ‘>’ toke 

in line marked above. why not work , how can fix it? thanks! nathan

a<t> dependent type (i.e. depends on template parameter t), have specify you're referring template member:

a.template f1<ct>();