re PR c++/79301 (With -Werror=pedantic outside C++17 mode, __has_cpp_attribute(fallthrough) is nonzero but [[fallthrough]] fails)

PR c++/79301
	* parser.c (cp_parser_std_attribute): Don't pedwarn about
	[[deprecated]] with -std=c++11 and [[fallthrough]] with
	-std=c++11 and -std=c++14.

	* g++.dg/cpp1y/feat-cxx11-neg.C: Remove (with pedwarn) from
	[[deprecated]] comment.
	* g++.dg/cpp1y/feat-cxx98-neg.C: Likewise.
	* g++.dg/cpp1y/feat-cxx11.C: Likewise.
	* g++.dg/cpp1y/attr-deprecated-neg.C: Don't expect warnings for
	[[deprecated]] in -std=c++11.
	* g++.dg/cpp0x/fallthrough2.C: Don't expect warnings for
	[[fallthrough]] in -std=c++11 and -std=c++14.

From-SVN: r245489

gcc/cp/ChangeLog

@@ -1,5 +1,10 @@
 2017-02-15  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/79301
+	* parser.c (cp_parser_std_attribute): Don't pedwarn about
+	[[deprecated]] with -std=c++11 and [[fallthrough]] with
+	-std=c++11 and -std=c++14.
+
 	PR c++/79288
 	* decl.c (grokdeclarator): For static data members, handle thread_p
 	only after handling inline.

gcc/cp/parser.c

@@ -24749,22 +24749,10 @@ cp_parser_std_attribute (cp_parser *parser, tree attr_ns)
 	TREE_PURPOSE (TREE_PURPOSE (attribute)) = get_identifier ("gnu");
       /* C++14 deprecated attribute is equivalent to GNU's.  */
       else if (is_attribute_p ("deprecated", attr_id))
-	{
+	TREE_PURPOSE (TREE_PURPOSE (attribute)) = get_identifier ("gnu");
-	  if (cxx_dialect == cxx11)
-	    pedwarn (token->location, OPT_Wpedantic,
-		     "%<deprecated%> is a C++14 feature;"
-		     " use %<gnu::deprecated%>");
-	  TREE_PURPOSE (TREE_PURPOSE (attribute)) = get_identifier ("gnu");
-	}
       /* C++17 fallthrough attribute is equivalent to GNU's.  */
       else if (is_attribute_p ("fallthrough", attr_id))
-	{
+	TREE_PURPOSE (TREE_PURPOSE (attribute)) = get_identifier ("gnu");
-	  if (cxx_dialect < cxx1z)
-	    pedwarn (token->location, OPT_Wpedantic,
-		     "%<fallthrough%> is a C++17 feature;"
-		     " use %<gnu::fallthrough%>");
-	  TREE_PURPOSE (TREE_PURPOSE (attribute)) = get_identifier ("gnu");
-	}
       /* Transactional Memory TS optimize_for_synchronized attribute is
 	 equivalent to GNU transaction_callable.  */
       else if (is_attribute_p ("optimize_for_synchronized", attr_id))

gcc/testsuite/ChangeLog

@@ -1,5 +1,15 @@
 2017-02-15  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/79301
+	* g++.dg/cpp1y/feat-cxx11-neg.C: Remove (with pedwarn) from
+	[[deprecated]] comment.
+	* g++.dg/cpp1y/feat-cxx98-neg.C: Likewise.
+	* g++.dg/cpp1y/feat-cxx11.C: Likewise.
+	* g++.dg/cpp1y/attr-deprecated-neg.C: Don't expect warnings for
+	[[deprecated]] in -std=c++11.
+	* g++.dg/cpp0x/fallthrough2.C: Don't expect warnings for
+	[[fallthrough]] in -std=c++11 and -std=c++14.
+
 	PR c++/79288
 	* g++.dg/tls/pr79288.C: New test.
 

gcc/testsuite/g++.dg/cpp0x/fallthrough2.C

@@ -11,7 +11,7 @@ f (int i)
     {
     case 1:
       bar (1);
-      [[fallthrough]]; // { dg-warning ".fallthrough. is a C\\+\\+17 feature" "" { target { c++14_down } }  }
+      [[fallthrough]];
     case 3:
       bar (1);
       [[gnu::fallthrough, gnu::fallthrough]]; // { dg-warning ".fallthrough. attribute specified multiple times" }

gcc/testsuite/g++.dg/cpp1y/attr-deprecated-neg.C

@@ -1,22 +1,22 @@
 // { dg-do compile { target c++11_only } }
 // { dg-options "-pedantic" }
 
-class [[deprecated]] A // { dg-warning "'deprecated' is a C..14 feature" }
+class [[deprecated]] A // { dg-bogus "'deprecated' is a C..14 feature" }
 {
 };
 
-[[deprecated]] // { dg-warning "'deprecated' is a C..14 feature" }
+[[deprecated]] // { dg-bogus "'deprecated' is a C..14 feature" }
 int
 foo(int n)
 {
   return 42 + n;
 }
 
-class [[deprecated("B has been superceded by C")]] B // { dg-warning "'deprecated' is a C..14 feature" }
+class [[deprecated("B has been superceded by C")]] B // { dg-bogus "'deprecated' is a C..14 feature" }
 {
 };
 
-[[deprecated("bar is unsafe; use foobar instead")]] // { dg-warning "'deprecated' is a C..14 feature" }
+[[deprecated("bar is unsafe; use foobar instead")]] // { dg-bogus "'deprecated' is a C..14 feature" }
 int
 bar(int n)
 {

gcc/testsuite/g++.dg/cpp1y/feat-cxx11-neg.C

@@ -57,7 +57,7 @@
 
 //  C++14 attributes:
 
-//  Attribute [[deprecated]] is allowed in C++11 as an extension (with pedwarn).
+//  Attribute [[deprecated]] is allowed in C++11 as an extension.
 //#ifdef __has_cpp_attribute
 //#  if __has_cpp_attribute(deprecated) == 201309
 //#    error "__has_cpp_attribute(deprecated)" // {  }

gcc/testsuite/g++.dg/cpp1y/feat-cxx11.C

@@ -166,7 +166,7 @@
 
 //  C++14 attributes:
 
-//  Attribute [[deprecated]] is allowed in C++11 as an extension (with pedwarn).
+//  Attribute [[deprecated]] is allowed in C++11 as an extension.
 #ifdef __has_cpp_attribute
 #  if ! __has_cpp_attribute(deprecated)
 #    error "__has_cpp_attribute(deprecated)"

gcc/testsuite/g++.dg/cpp1y/feat-cxx98-neg.C

@@ -144,7 +144,7 @@
 
 //  C++14 attributes:
 
-//  Attribute [[deprecated]] is allowed in C++11 as an extension (with pedwarn).
+//  Attribute [[deprecated]] is allowed in C++11 as an extension.
 //#ifdef __has_cpp_attribute
 //#  if __has_cpp_attribute(deprecated) == 201309
 //#    error "__has_cpp_attribute(deprecated)" // {  }