1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2 
3 namespace DeductionForInstantiation {
4   template<unsigned I, typename ...Types>
5   struct X { };
6 
7   template<typename ...Types>
8   void f0(X<sizeof...(Types), Types&...>) { }
9 
10   // No explicitly-specified arguments
11   template void f0(X<0>);
12   template void f0(X<1, int&>);
13   template void f0(X<2, int&, short&>);
14 
15   // One explicitly-specified argument
16   template void f0<float>(X<1, float&>);
17   template void f0<double>(X<1, double&>);
18 
19   // Two explicitly-specialized arguments
20   template void f0<char, unsigned char>(X<2, char&, unsigned char&>);
21   template void f0<signed char, char>(X<2, signed char&, char&>);
22 
23   // FIXME: Extension of explicitly-specified arguments
24   //  template void f0<short, int>(X<3, short&, int&, long&>);
25 }
26 
27 namespace DeductionWithConversion {
28   template<char...> struct char_values {
29     static const unsigned value = 0;
30   };
31 
32   template<int C1, char C3>
33   struct char_values<C1, 12, C3> {
34     static const unsigned value = 1;
35   };
36 
37   int check0[char_values<1, 12, 3>::value == 1? 1 : -1];
38 
39   template<int...> struct int_values {
40     static const unsigned value = 0;
41   };
42 
43   template<unsigned char C1, unsigned char C3>
44   struct int_values<C1, 12, C3> {
45     static const unsigned value = 1;
46   };
47 
48   int check1[int_values<256, 12, 3>::value == 0? 1 : -1];
49   int check2[int_values<3, 12, 3>::value == 1? 1 : -1];
50 }
51