[clang] [Clang] support friend declarations with a dependent nested-name-specifier (PR #191268)

[Vlad Serebrennikov via cfe-commits]

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@@ -450,11 +445,15 @@ void A<int>::B::e() { (void)c.private_int; }
 template<class T>
 void A<T>::f() { (void)c.private_int; }
 int A<int>::f() { (void)c.private_int; return 0; }
+// expected-error at -1 {{'private_int' is a private member of 'cwg1862::C'}}
+// expected-note at -30 {{implicitly declared private here}}
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Endilll wrote:

Also, notes should be indented by 2 spaces relative to the error they attach to

https://github.com/llvm/llvm-project/pull/191268