Fix crash when emitting error.

With templated classes, is possible to not be able to determine is a member
function is a special member function before the class is instantiated.  Only
these special member functions can be defaulted.  In some cases, knowing
whether a function is a special member function can't be determined until
instantiation, so an uninstantiated function could possibly be defaulted too.
Add a case to the error diagnostic when the function marked with a default is
not known to be a special member function.

llvm-svn: 282989

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp b/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
index 08d5dbd285d..7ec9726095c 100644
--- a/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
+++ b/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
@@ -234,4 +234,12 @@ template<bool B> struct X {
 X<true> x1;
 X<false> x2; // expected-note {{in instantiation}}
 
+template <typename Type>
+class E {
+  explicit E(const int &) = default;
+};
+
+template <typename Type>
+E<Type>::E(const int&) {}  // expected-error {{definition of explicitly defaulted function}}
+
 }