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// Build don't link: template <class S, class T> class mem_fun1_t { public: mem_fun1_t(S (T::*pf)(double)) {} }; template <class T> class mem_fun1_t<void, T> { public: mem_fun1_t(void (T::*pf)(double)) {} }; struct Operation { double eval(double) {} }; int main() { mem_fun1_t<double, Operation> m(&Operation::eval); }