re PR c++/78693 (Bogus 'inconsistent deduction for ‘auto’' error when having a…

re PR c++/78693 (Bogus 'inconsistent deduction for ‘auto’' error when having a dependent initializer and a nondependent one in the same declaration)

	PR c++/78693
	* parser.c (cp_parser_simple_declaration): Only complain about
	inconsistent auto deduction if auto_result doesn't use auto.

	* g++.dg/cpp0x/pr78693.C: New test.

From-SVN: r244074

gcc/cp/ChangeLog

 2017-01-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/78693
+	* parser.c (cp_parser_simple_declaration): Only complain about
+	inconsistent auto deduction if auto_result doesn't use auto.
+
 	* parser.c (cp_parser_simple_declaration): Diagnose function
 	declaration among more than one init-declarators with auto
 	specifier.

gcc/cp/parser.c

@@ -12799,9 +12799,11 @@ cp_parser_simple_declaration (cp_parser* parser,
 	    }
 	}
 
-      if (auto_result)
+      if (auto_result
+	  && (!processing_template_decl || !type_uses_auto (auto_result)))
 	{
-	  if (last_type && last_type != error_mark_node
+	  if (last_type
+	      && last_type != error_mark_node
 	      && !same_type_p (auto_result, last_type))
 	    {
 	      /* If the list of declarators contains more than one declarator,

gcc/testsuite/ChangeLog

 2017-01-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/78693
+	* g++.dg/cpp0x/pr78693.C: New test.
+
 	PR driver/78957
 	* gcc.dg/pr78957.c: New test.
 

gcc/testsuite/g++.dg/cpp0x/pr78693.C

+// PR c++/78693
+// { dg-do compile { target c++11 } }
+
+template <class T>
+void
+foo (T t)
+{
+  auto i = t, j = 1;		// { dg-bogus "inconsistent deduction" }
+}
+
+template <class T>
+void
+bar (T t)
+{
+  auto i = 1, j = t, k = 2;	// { dg-bogus "inconsistent deduction" }
+}
+
+template <class T, class U>
+void
+foo (T t, U u)
+{
+  auto i = t, j = u;		// { dg-bogus "inconsistent deduction" }
+}
+
+void
+foo ()
+{
+  foo (0);
+  bar (0);
+  foo (1, 2);
+}