[LLVMbugs] [Bug 9518] New: Friend function definition not instantiated in certain circumstances

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9518

           Summary: Friend function definition not instantiated in certain
                    circumstances
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: schaub.johannes at googlemail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


The following fails to link, not finding the definition of "f".

template<typename T> 
struct provide {
  friend T f() { return T(); }
};

void g() {
  void f();
  provide<void> p;
  f();
}

int main() {
  g();
}

Swapping the order of "void f();" and the definition of "p", or moving "void
f();" to namespace scope, makes it link correctly.

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