[llvm-bugs] [Bug 5716] Function template not instantiated if declared as friend

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=5716

Bastien Penavayre <bastienPenava at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bastienPenava at gmail.com
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #2 from Bastien Penavayre <bastienPenava at gmail.com> ---
The example given is resolved but there are other cases that aren't,
for instance:

struct flag
{
    template<class T>
    friend  void *init(flag, T);
};

template<class R>
struct writer
{
    template<class T>
    friend  void *init(flag, T) {
        return nullptr;
    }
};

int main()
{
    void *data = init(flag{}, 42);
    writer<int> tmp;
    //note that if the next line is uncommented the link error disappear:
    //sizeof(init(flag{}, 42));
}

produce the error: 
   undefined reference to `void* init<int>(flag, int)'

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