1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 3 // Note: Template argument deduction involving parameter packs 4 // (14.5.3) can deduce zero or more arguments for each parameter pack. 5 6 template<class> struct X { 7 static const unsigned value = 0; 8 }; 9 10 template<class R, class ... ArgTypes> struct X<R(int, ArgTypes ...)> { 11 static const unsigned value = 1; 12 }; 13 14 template<class ... Types> struct Y { 15 static const unsigned value = 0; 16 }; 17 18 template<class T, class ... Types> struct Y<T, Types& ...> { 19 static const unsigned value = 1; 20 }; 21 22 template<class ... Types> int f(void (*)(Types ...)); 23 void g(int, float); 24 25 int check0[X<int>::value == 0? 1 : -1]; // uses primary template 26 int check1[X<int(int, float, double)>::value == 1? 1 : -1]; // uses partial specialization 27 int check2[X<int(float, int)>::value == 0? 1 : -1]; // uses primary template 28 int check3[Y<>::value == 0? 1 : -1]; // uses primary template 29 int check4[Y<int&, float&, double&>::value == 1? 1 : -1]; // uses partial specialization 30 int check5[Y<int, float, double>::value == 0? 1 : -1]; // uses primary template 31 int fv = f(g); // okay 32
