gcc/testsuite/g++.dg/cpp0x/constexpr-attribute.C

   1 // { dg-do compile { target c++11 } }
   2
   3 //A few constexpr's
   4 constexpr int foo() { return __alignof__(int); }
   5
   6 template<typename T>
   7 constexpr int fooT() { return __alignof__(T); }
   8
   9 template<int N>
  10 constexpr int fooN() { return N; }
  11
  12 //Now the attributes
  13
  14 //with normal variables,
  15 int a __attribute__((aligned(foo())));
  16 int b __attribute__((aligned(fooT<int>())));
  17 int c __attribute__((aligned(fooN<__alignof__(int)>())));
  18
  19 //with variables inside a template,
  20 template <typename T>
  21 void fun()
  22 {
  23     T a __attribute__((aligned(foo())));
  24     T b __attribute__((aligned(fooT<T>())));
  25     T c __attribute__((aligned(fooN<__alignof__(T)>())));
  26     T d __attribute__((aligned(fooT<int>())));
  27     T e __attribute__((aligned(fooN<__alignof__(int)>())));
  28 }
  29
  30 //instantiate it,
  31 void bar()
  32 {
  33     fun<int>();
  34 }
  35
  36 //with classes
  37 struct __attribute__((aligned(foo()))) S0
  38 {
  39     char dummy;
  40 };
  41 S0 s0;
  42
  43 struct __attribute__((aligned(fooT<int>()))) S1
  44 {
  45     char dummy;
  46 };
  47 S1 s1;
  48
  49 //and class templates
  50 template <typename T>
  51 struct __attribute__((aligned(foo()))) S2
  52 {
  53     char dummy;
  54 };
  55
  56 S2<int> s2;
  57
  58 template <typename T>
  59 struct __attribute__((aligned(fooT<T>()))) S3
  60 {
  61     char dummy;
  62 };
  63 S3<int> s3;