parser.c (cp_parser_nested_name_specifier_opt): Add fix-it information to…

parser.c (cp_parser_nested_name_specifier_opt): Add fix-it information to diagnostic of invalid colon in nested-name-specifier.

        * parser.c (cp_parser_nested_name_specifier_opt): Add fix-it
        information to diagnostic of invalid colon in nested-name-specifier.

        * g++.dg/diagnostic/nested-name-1.C: New test.

From-SVN: r247282

gcc/cp/ChangeLog

+2017-04-26  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	* parser.c (cp_parser_nested_name_specifier_opt): Add fix-it
+	information to diagnostic of invalid colon in nested-name-specifier.
+
 2017-04-25  Volker Reichelt  <v.reichelt@netcologne.de>
 
 	* parser.c (cp_parser_elaborated_type_specifier): Add fix-it to

gcc/cp/parser.c

@@ -5931,8 +5931,11 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
 	      && parser->colon_corrects_to_scope_p
 	      && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_NAME)
 	    {
-	      error_at (token->location,
-			"found %<:%> in nested-name-specifier, expected %<::%>");
+	      gcc_rich_location richloc (token->location);
+	      richloc.add_fixit_replace ("::");
+	      error_at_rich_loc (&richloc,
+				 "found %<:%> in nested-name-specifier, "
+				 "expected %<::%>");
 	      token->type = CPP_SCOPE;
 	    }
 

gcc/testsuite/ChangeLog

+2017-04-26  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	* g++.dg/diagnostic/nested-name-1.C: New test.
+
 2017-04-26  Martin Liska  <mliska@suse.cz>
 
 	* gcc.dg/guality/guality.h: Add prefix to test verification.

gcc/testsuite/g++.dg/diagnostic/nested-name-1.C

+// { dg-options "-fdiagnostics-show-caret" }
+
+namespace N
+{
+  struct A {};
+}
+
+N:A a;  /* { dg-error "nested-name-specifier" }
+  { dg-begin-multiline-output "" }
+ N:A a;
+  ^
+  ::
+  { dg-end-multiline-output "" } */