re PR c++/51553 (brace initialization and conversion operators)

	PR c++/51553
	* call.c (add_function_candidate): Allow conversions for the copy
	parm in list-initialization unless the argument is an init-list.

From-SVN: r182495

gcc/cp/ChangeLog

+2011-12-19  Jason Merrill  <jason@redhat.com>
+
+	PR c++/51553
+	* call.c (add_function_candidate): Allow conversions for the copy
+	parm in list-initialization unless the argument is an init-list.
+
 2011-12-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/51619

gcc/cp/call.c

@@ -1964,8 +1964,10 @@ add_function_candidate (struct z_candidate **candidates,
 	    {
 	      lflags |= LOOKUP_COPY_PARM;
 	      /* We allow user-defined conversions within init-lists, but
-		 not for the copy constructor.  */
-	      if (flags & LOOKUP_NO_COPY_CTOR_CONVERSION)
+		 don't list-initialize the copy parm, as that would mean
+		 using two levels of braces for the same type.  */
+	      if ((flags & LOOKUP_NO_COPY_CTOR_CONVERSION)
+		  && BRACE_ENCLOSED_INITIALIZER_P (arg))
 		lflags |= LOOKUP_NO_CONVERSION;
 	    }
 	  else

gcc/testsuite/ChangeLog

 2011-12-19  Jason Merrill  <jason@redhat.com>
 
+	PR c++/51553
+	* g++.dg/cpp0x/initlist64.C: New.
+
 	PR c++/51228
 	* c-c++-common/transparent-union-1.c: New.
 

gcc/testsuite/g++.dg/cpp0x/initlist64.C

+// PR c++/51553
+// { dg-options -std=c++0x }
+
+struct X
+{
+  X();
+};
+
+struct Y
+{
+  operator X() const;
+};
+
+struct Z
+{
+  explicit operator X() const;
+};
+
+X a = { Y() };
+X aa = Y();
+
+X b{ Y() };
+X bb(Y());
+
+X c = { Z() };  // { dg-error "" "" { xfail *-*-* } }
+X cc = Z();	// { dg-error "" }
+
+X d{ Z() };
+X dd( Z() );