Access to a public template alias declaration that refers to friend's private nested type is not allowed. (original) (raw)

Extended Description

The test case that fails is:

struct FooAccessor { template using Foo = typename T::Foo; };

class Type { friend struct FooAccessor;

using Foo = int;

};

int main() { FooAccessor::Foo t; }

The result is:

$ clang++ test.cpp -std=c++11 test.cpp:4:5: error: 'Foo' is a private member of 'Type' using Foo = typename T::Foo; ^ test.cpp:11:11: note: implicitly declared private here using Foo = int; ^ 1 error generated.