parser.c (cp_parser_cv_qualifier_seq_opt): Add fix-it info to error message.

        * parser.c (cp_parser_cv_qualifier_seq_opt): Add fix-it info to
        error message.
        (cp_parser_virt_specifier_seq_opt): Likewise.
        (set_and_check_decl_spec_loc): Likewise twice.

        * g++.dg/diagnostic/duplicate1.C: New test.
        * g++.dg/cpp0x/duplicate1.C: New test.

From-SVN: r247105

gcc/cp/ChangeLog

+2017-04-24  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	* parser.c (cp_parser_cv_qualifier_seq_opt): Add fix-it info to
+	error message.
+	(cp_parser_virt_specifier_seq_opt): Likewise.
+	(set_and_check_decl_spec_loc): Likewise twice.
+
 2017-04-21  Jason Merrill  <jason@redhat.com>
 
 	PR c++/80179 - ICE with initialized flexible array member.

gcc/cp/parser.c

@@ -20258,7 +20258,9 @@ cp_parser_cv_qualifier_seq_opt (cp_parser* parser)
 
       if (cv_quals & cv_qualifier)
 	{
-	  error_at (token->location, "duplicate cv-qualifier");
+	  gcc_rich_location richloc (token->location);
+	  richloc.add_fixit_remove ();
+	  error_at_rich_loc (&richloc, "duplicate cv-qualifier");
 	  cp_lexer_purge_token (parser->lexer);
 	}
       else
@@ -20405,7 +20407,9 @@ cp_parser_virt_specifier_seq_opt (cp_parser* parser)
 
       if (virt_specifiers & virt_specifier)
 	{
-	  error_at (token->location, "duplicate virt-specifier");
+	  gcc_rich_location richloc (token->location);
+	  richloc.add_fixit_remove ();
+	  error_at_rich_loc (&richloc, "duplicate virt-specifier");
 	  cp_lexer_purge_token (parser->lexer);
 	}
       else
@@ -27677,7 +27681,11 @@ set_and_check_decl_spec_loc (cp_decl_specifier_seq *decl_specs,
 	    error_at (location,
 		      "both %<__thread%> and %<thread_local%> specified");
 	  else
-	    error_at (location, "duplicate %qD", token->u.value);
+	    {
+	      gcc_rich_location richloc (location);
+	      richloc.add_fixit_remove ();
+	      error_at_rich_loc (&richloc, "duplicate %qD", token->u.value);
+	    }
 	}
       else
 	{
@@ -27698,8 +27706,9 @@ set_and_check_decl_spec_loc (cp_decl_specifier_seq *decl_specs,
             "constexpr",
 	    "__complex"
 	  };
-	  error_at (location,
-		    "duplicate %qs", decl_spec_names[ds]);
+	  gcc_rich_location richloc (location);
+	  richloc.add_fixit_remove ();
+	  error_at_rich_loc (&richloc, "duplicate %qs", decl_spec_names[ds]);
 	}
     }
 }

gcc/testsuite/ChangeLog

+2017-04-24  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	* g++.dg/diagnostic/duplicate1.C: New test.
+	* g++.dg/cpp0x/duplicate1.C: New test.
+
 2017-04-24  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/80293

gcc/testsuite/g++.dg/cpp0x/duplicate1.C

+// { dg-options "-fdiagnostics-show-caret" }
+// { dg-do compile { target c++11 } }
+
+struct A
+{
+  virtual void foo() const;
+};
+
+struct B final final : A  /* { dg-error "duplicate virt-specifier" }
+  { dg-begin-multiline-output "" }
+ struct B final final : A
+                ^~~~~
+                -----
+  { dg-end-multiline-output "" } */
+{
+  virtual void foo() const override final override;  /* { dg-error "duplicate virt-specifier" }
+  { dg-begin-multiline-output "" }
+   virtual void foo() const override final override;
+                                           ^~~~~~~~
+                                           --------
+  { dg-end-multiline-output "" } */
+};
+
+thread_local thread_local int i = 0;  /* { dg-error "duplicate" }
+  { dg-begin-multiline-output "" }
+ thread_local thread_local int i = 0;
+              ^~~~~~~~~~~~
+              ------------
+  { dg-end-multiline-output "" } */

gcc/testsuite/g++.dg/diagnostic/duplicate1.C

+// { dg-options "-fdiagnostics-show-caret" }
+
+struct A
+{
+  void foo() const const;  /* { dg-error "duplicate cv-qualifier" }
+  { dg-begin-multiline-output "" }
+   void foo() const const;
+                    ^~~~~
+                    -----
+  { dg-end-multiline-output "" } */
+};
+
+volatile volatile int i = 0;  /* { dg-error "duplicate" }
+  { dg-begin-multiline-output "" }
+ volatile volatile int i = 0;
+          ^~~~~~~~
+          --------
+  { dg-end-multiline-output "" } */