clang/test/CXX/temp/temp.decls/temp.class.spec/temp.class.order/p2.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2 // expected-no-diagnostics
   3 template<int I, int J, class T> struct X {
   4   static const int value = 0;
   5 };
   6
   7 template<int I, int J> struct X<I, J, int> {
   8   static const int value = 1;
   9 };
  10
  11 template<int I> struct X<I, I, int> {
  12   static const int value = 2;
  13 };
  14
  15 int array0[X<0, 0, float>::value == 0? 1 : -1];
  16 int array1[X<0, 1, int>::value == 1? 1 : -1];
  17 int array2[X<0, 0, int>::value == 2? 1 : -1];
  18
  19 namespace DependentSubstPartialOrdering {
  20   template<typename T, typename U = void, typename V = void>
  21   struct X {
  22     static const unsigned value = 1;
  23   };
  24
  25   template<typename T, typename U>
  26   struct X<T, U, typename T::is_b> {
  27     static const unsigned value = 2;
  28   };
  29
  30   template<typename T>
  31   struct X<T, typename T::is_a, typename T::is_b> {
  32     static const unsigned value = 3;
  33   };
  34
  35   struct X1 { };
  36
  37   struct X2 {
  38     typedef void is_b;
  39   };
  40
  41   struct X3 {
  42     typedef void is_a;
  43     typedef void is_b;
  44   };
  45
  46   int check_X1[X<X1, void, void>::value == 1? 1 : -1];
  47   int check_X2[X<X2, void, void>::value == 2? 1 : -1];
  48   int check_X3[X<X3, void, void>::value == 3? 1 : -1];
  49 }