CMake/Tests/CompileFeatures/cxx_extended_friend_declara...

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template <typename T>
struct B
{
B() : m_i(42) {}
private:
int m_i;
friend T;
};
struct A
{
template<typename T>
int getBValue(B<T> b)
{
return b.m_i;
}
};
void someFunc()
{
A a;
B<A> b;
a.getBValue(b);
}