deduction.cpp revision 54c53cca105ed595e12fecf04e415c3712bda936 
1// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
2
3namespace 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
27namespace 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