re PR c++/46696 ([C++0x] Implicit copy constructor can't construct array of…

re PR c++/46696 ([C++0x] Implicit copy constructor can't construct array of subtype with user-defined copy constructor.)

	PR c++/46696
	* typeck.c (cp_build_modify_expr): Check DECL_DEFAULTED_FN.

From-SVN: r174226

gcc/cp/ChangeLog

 2011-05-25  Jason Merrill  <jason@redhat.com>
 
+	PR c++/46696
+	* typeck.c (cp_build_modify_expr): Check DECL_DEFAULTED_FN.
+
 	PR c++/47184
 	* parser.c (cp_parser_parameter_declaration): Recognize
 	list-initialization.

gcc/cp/typeck.c

@@ -6748,7 +6748,7 @@ cp_build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs,
 
       /* Allow array assignment in compiler-generated code.  */
       else if (!current_function_decl
-	       || !DECL_ARTIFICIAL (current_function_decl))
+	       || !DECL_DEFAULTED_FN (current_function_decl))
 	{
           /* This routine is used for both initialization and assignment.
              Make sure the diagnostic message differentiates the context.  */

gcc/testsuite/ChangeLog

 2011-05-25  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/cpp0x/defaulted29.C: New.
+
 	* g++.dg/cpp0x/initlist51.C: New.
 
 2011-05-25  Janis Johnson  <janisjo@codesourcery.com>

gcc/testsuite/g++.dg/cpp0x/defaulted29.C

+// PR c++/46696
+// { dg-options -std=c++0x }
+
+struct A
+{
+  A& operator= (A const&);
+};
+
+struct B
+{
+  A ar[1];
+  B& operator= (B const&) = default;
+};
+
+int main()
+{
+  B x;
+  B y;
+  y = x;
+}