gcc-4.9/gcc/testsuite/g++.dg/cpp0x/implicit6.C


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// Circular implicit declarations were causing errors
// { dg-do compile { target c++11 } }

struct Ray;

struct Vector
{
  virtual void f();		// make non-trivially-copyable
  Vector(const Ray &) ;
};

struct array
{
  Vector v;
};

struct Ray
{
  array a;
};

extern Ray r1;
Ray r2=r1;