* semantics.c (finish_compound_literal): Handle class placeholder.

From-SVN: r240802

gcc/cp/ChangeLog

+2016-10-05  Jason Merrill  <jason@redhat.com>
+
+	* semantics.c (finish_compound_literal): Handle class placeholder.
+
 2016-10-05  Marek Polacek  <polacek@redhat.com>
 
 	Implement P0305R1, Selection statements with initializer.

gcc/cp/semantics.c

@@ -2671,6 +2671,11 @@ finish_compound_literal (tree type, tree compound_literal,
       return error_mark_node;
     }
 
+  if (tree anode = type_uses_auto (type))
+    if (CLASS_PLACEHOLDER_TEMPLATE (anode))
+      type = do_auto_deduction (type, compound_literal, anode, complain,
+				adc_variable_type);
+
   if (processing_template_decl)
     {
       TREE_TYPE (compound_literal) = type;

gcc/testsuite/g++.dg/cpp1z/class-deduction18.C

+// { dg-options -std=c++1z }
+
+template<class T> struct S{S(T){}};
+
+int main() {
+  S{1};
+}