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      1 class HasFriends {
      2   friend void friend_1(HasFriends);
      3   friend void friend_2(HasFriends);
      4   void private_thing();
      5 };
      6 
      7 struct HasNontrivialDefaultConstructor {
      8   HasNontrivialDefaultConstructor() = default;
      9   HasNontrivialDefaultConstructor(int n = 0);
     10 
     11   // Ensure this class is not POD but is still trivially-copyable.
     12   // This is necessary to exercise the second static_assert below,
     13   // because GCC's spec for __has_trivial_constructor is absurd.
     14   int m;
     15 private:
     16   int n;
     17 };
     18 
     19 static_assert(!__is_trivial(HasNontrivialDefaultConstructor), "");
     20 static_assert(!__has_trivial_constructor(HasNontrivialDefaultConstructor), "");
     21 
     22 void *operator new[](__SIZE_TYPE__);
     23 
     24 extern int mergeUsedFlag;
     25 inline int getMergeUsedFlag() { return mergeUsedFlag; }
     26 
     27 typedef struct {
     28   int n;
     29   int m;
     30 } NameForLinkage;
     31 
     32 struct HasVirtualFunctions {
     33   virtual void f();
     34 };
     35 struct OverridesVirtualFunctions : HasVirtualFunctions {
     36   void f();
     37 };
     38 extern "C" void ExternCFunction();
     39 
     40 typedef struct {
     41   struct Inner {
     42     int n;
     43   };
     44 } NameForLinkage2;
     45 auto name_for_linkage2_inner_a = NameForLinkage2::Inner();
     46 typedef decltype(name_for_linkage2_inner_a) NameForLinkage2Inner;
     47 
     48 namespace Aliased { extern int a; }
     49 namespace Alias = Aliased;
     50 
     51 struct InhCtorA { InhCtorA(int); };
     52 struct InhCtorB : InhCtorA { using InhCtorA::InhCtorA; };
     53