clang/test/SemaTemplate/fibonacci.cpp

   1 // RUN: %clang_cc1 -fsyntax-only %s
   2
   3 template<unsigned I>
   4 struct FibonacciEval;
   5
   6 template<unsigned I>
   7 struct Fibonacci {
   8   enum { value = FibonacciEval<I-1>::value + FibonacciEval<I-2>::value };
   9 };
  10
  11 template<unsigned I>
  12 struct FibonacciEval {
  13   enum { value = Fibonacci<I>::value };
  14 };
  15
  16 template<> struct Fibonacci<0> {
  17   enum { value = 0 };
  18 };
  19
  20 template<> struct Fibonacci<1> {
  21   enum { value = 1 };
  22 };
  23
  24 int array5[Fibonacci<5>::value == 5? 1 : -1];
  25 int array10[Fibonacci<10>::value == 55? 1 : -1];
  26
  27 template<unsigned I>
  28 struct FibonacciEval2;
  29
  30 template<unsigned I>
  31 struct Fibonacci2 {
  32   static const unsigned value
  33     = FibonacciEval2<I-1>::value + FibonacciEval2<I-2>::value;
  34 };
  35
  36 template<unsigned I>
  37 struct FibonacciEval2 {
  38   static const unsigned value = Fibonacci2<I>::value;
  39 };
  40
  41 template<> struct Fibonacci2<0> {
  42   static const unsigned value = 0;
  43 };
  44
  45 template<> struct Fibonacci2<1> {
  46   static const unsigned value = 1;
  47 };
  48
  49 int array5_2[Fibonacci2<5>::value == 5? 1 : -1];
  50 int array10_2[Fibonacci2<10>::value == 55? 1 : -1];
  51
  52 template<unsigned I>
  53 struct Fibonacci3 {
  54   static const unsigned value = Fibonacci3<I-1>::value + Fibonacci3<I-2>::value;
  55 };
  56
  57 template<> struct Fibonacci3<0> {
  58   static const unsigned value = 0;
  59 };
  60
  61 template<> struct Fibonacci3<1> {
  62   static const unsigned value = 1;
  63 };
  64
  65 int array5_3[Fibonacci3<5>::value == 5? 1 : -1];
  66 int array10_3[Fibonacci3<10>::value == 55? 1 : -1];