parser.c (cp_parser_class_head): Improve error recovery upon extra qualification error.

/cp
2019-10-21  Paolo Carlini  <paolo.carlini@oracle.com>

	* parser.c (cp_parser_class_head): Improve error recovery upon
	extra qualification error.

/testsuite
2019-10-21  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/parse/qualified2.C: Tighten dg-error directive.
	* g++.old-deja/g++.other/decl5.C: Don't expect redundant error.

From-SVN: r277268

gcc/cp/ChangeLog

+2019-10-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* parser.c (cp_parser_class_head): Improve error recovery upon
+	extra qualification error.
+
 2019-10-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92015

gcc/cp/parser.c

@@ -24178,12 +24178,8 @@ cp_parser_class_head (cp_parser* parser,
 	 ... [or] the definition or explicit instantiation of a
 	 class member of a namespace outside of its namespace.  */
       if (scope == nested_name_specifier)
-	{
 	permerror (nested_name_specifier_token_start->location,
 		   "extra qualification not allowed");
-	  nested_name_specifier = NULL_TREE;
-	  num_templates = 0;
-	}
     }
   /* An explicit-specialization must be preceded by "template <>".  If
      it is not, try to recover gracefully.  */

gcc/testsuite/ChangeLog

+2019-10-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* g++.dg/parse/qualified2.C: Tighten dg-error directive.
+	* g++.old-deja/g++.other/decl5.C: Don't expect redundant error.
+
 2019-10-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92015

gcc/testsuite/g++.dg/parse/qualified2.C

 namespace Glib {
   template <typename> class Value {};
-  template <>         class Glib::Value<int> {}; // { dg-error "" }
+  template <>         class Glib::Value<int> {}; // { dg-error "29:extra qualification" }
 }

gcc/testsuite/g++.old-deja/g++.other/decl5.C

@@ -8,11 +8,10 @@
 
 
 struct A {
-  int A::fn();        // { dg-error "extra qualification" } 
-  int A::m;           // { dg-error "extra qualification" } 
+  int A::fn();        // { dg-error "7:extra qualification" } 
+  int A::m;           // { dg-error "7:extra qualification" } 
   struct e;
-  struct A::e {int i;}; // { dg-error "extra qualification" "qual" } 
-  // { dg-error "anonymous struct" "anon" { target *-*-* } .-1 }
+  struct A::e {int i;}; // { dg-error "10:extra qualification" "qual" } 
   struct A::expand {  // { dg-error "qualified name" } 
   int m;
   };