1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 // expected-no-diagnostics 3 4 // Note: Template argument deduction involving parameter packs 5 // (14.5.3) can deduce zero or more arguments for each parameter pack. 6 7 template<class> struct X { 8 static const unsigned value = 0; 9 }; 10 11 template<class R, class ... ArgTypes> struct X<R(int, ArgTypes ...)> { 12 static const unsigned value = 1; 13 }; 14 15 template<class ... Types> struct Y { 16 static const unsigned value = 0; 17 }; 18 19 template<class T, class ... Types> struct Y<T, Types& ...> { 20 static const unsigned value = 1; 21 }; 22 23 template<class ... Types> int f(void (*)(Types ...)); 24 void g(int, float); 25 26 int check0[X<int>::value == 0? 1 : -1]; // uses primary template 27 int check1[X<int(int, float, double)>::value == 1? 1 : -1]; // uses partial specialization 28 int check2[X<int(float, int)>::value == 0? 1 : -1]; // uses primary template 29 int check3[Y<>::value == 0? 1 : -1]; // uses primary template 30 int check4[Y<int&, float&, double&>::value == 1? 1 : -1]; // uses partial specialization 31 int check5[Y<int, float, double>::value == 0? 1 : -1]; // uses primary template 32 int fv = f(g); // okay 33
