gcc/testsuite/g++.dg/cpp0x/constexpr-conv3.C

   1 // PR c++/87145
   2 // { dg-do compile { target c++11 } }
   3
   4 template<typename T, T t> struct integral_constant {
   5   static constexpr T value = t;
   6 };
   7
   8 enum class Enum : unsigned {};
   9
  10 struct Pod {
  11   unsigned val;
  12
  13   constexpr operator Enum() const {
  14     return static_cast<Enum>(val);
  15   }
  16 };
  17
  18 template<unsigned N>
  19 constexpr void foo() {
  20   using Foo = integral_constant<Enum, Pod{N}>;
  21 }
  22
  23 int main() {
  24   foo<2>();
  25 }