[llvm-bugs] [Bug 35435] New: Member access to incomplete type from dllimport

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35435

            Bug ID: 35435
           Summary: Member access to incomplete type from dllimport
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zahira.ammarguellat at intel.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

An explicit instantiation request should be ignored when it’s trying to
instantiate a dllimport class.

Reproducer:

class __declspec(dllimport) Edge;

template <class T>
class  __declspec(dllimport) Range
{
  void insert(T *obj) { obj->loc(); }
};

template void Range<Edge>::insert(Edge *);

ksh-3.2$ clang -c t1.cpp
t1.cpp:10:28: error: member access into incomplete type 'test1::Edge'
  void insert(T *obj) { obj->loc(); }
                           ^
t1.cpp:13:28: note: in instantiation of member function
'test1::Range<test1::Edge>::insert' requested here
template void Range<Edge>::insert(Edge *);
                           ^
t1.cpp:5:29: note: forward declaration of 'test1::Edge'
class __declspec(dllimport) Edge;
                            ^
t1.cpp:22:28: error: member access into incomplete type 'test2::Edge'
  void insert(T* obj) { obj->loc(); }
                           ^
t1.cpp:25:28: note: in instantiation of member function
'test2::Range<test2::Edge>::insert' requested here
template void Range<Edge>::insert(Edge *);
                           ^
t1.cpp:17:29: note: forward declaration of 'test2::Edge'
class __declspec(dllexport) Edge;
                            ^
2 errors generated.

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