re PR fortran/85839 ([F2018] warn for obsolescent features)

2018-05-25  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/85839
	* match.c (gfc_match_block_data): Call gfc_notify_std to warn about
	an obsolescent feature in Fortran 2018.
	(gfc_match_equivalence): Ditto.
	* resolve.c (resolve_common_blocks): Ditto.
	(gfc_resolve_forall): Ditto.
	* symbol.c (gfc_define_st_label): Ditto.


2018-05-25  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/85839
	* gfortran.dg/f2018_obs.f90: New test case.

From-SVN: r260705

gcc/fortran/ChangeLog

+2018-05-25  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/85839
+	* match.c (gfc_match_block_data): Call gfc_notify_std to warn about
+	an obsolescent feature in Fortran 2018.
+	(gfc_match_equivalence): Ditto.
+	* resolve.c (resolve_common_blocks): Ditto.
+	(gfc_resolve_forall): Ditto.
+	* symbol.c (gfc_define_st_label): Ditto.
+
 2018-05-24  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/85543

gcc/fortran/match.c

@@ -5259,6 +5259,10 @@ gfc_match_block_data (void)
   gfc_symbol *sym;
   match m;
 
+  if (!gfc_notify_std (GFC_STD_F2018_OBS, "BLOCK DATA construct at %L",
+      &gfc_current_locus))
+    return MATCH_ERROR;
+
   if (gfc_match_eos () == MATCH_YES)
     {
       gfc_new_block = NULL;
@@ -5575,6 +5579,9 @@ gfc_match_equivalence (void)
 	}
     }
 
+  if (!gfc_notify_std (GFC_STD_F2018_OBS, "EQUIVALENCE statement at %C"))
+    return MATCH_ERROR;
+
   return MATCH_YES;
 
 syntax:

gcc/fortran/resolve.c

@@ -997,6 +997,10 @@ resolve_common_blocks (gfc_symtree *common_root)
 
   resolve_common_vars (common_root->n.common, true);
 
+  if (!gfc_notify_std (GFC_STD_F2018_OBS, "COMMON block at %L",
+		       &common_root->n.common->where))
+    return;
+
   /* The common name is a global name - in Fortran 2003 also if it has a
      C binding name, since Fortran 2008 only the C binding name is a global
      identifier.  */
@@ -9930,6 +9934,9 @@ gfc_resolve_forall (gfc_code *code, gfc_namespace *ns, int forall_save)
 
   old_nvar = nvar;
 
+  if (!gfc_notify_std (GFC_STD_F2018_OBS, "FORALL construct at %L", &code->loc))
+    return;
+
   /* Start to resolve a FORALL construct   */
   if (forall_save == 0)
     {

gcc/fortran/symbol.c

@@ -2725,6 +2725,10 @@ gfc_define_st_label (gfc_st_label *lp, gfc_sl_type type, locus *label_locus)
 				  "DO termination statement which is not END DO"
 				  " or CONTINUE with label %d at %C", labelno))
 	    return;
+	  if (type == ST_LABEL_DO_TARGET
+	      && !gfc_notify_std (GFC_STD_F2018_OBS, "Labeled DO statement "
+				  "at %L", label_locus))
+	    return;
 	  break;
 
 	default:

gcc/testsuite/ChangeLog

+2018-05-25  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/85839
+	* gfortran.dg/f2018_obs.f90: New test case.
+
 2018-05-24  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/85543

gcc/testsuite/gfortran.dg/f2018_obs.f90

+! { dg-do compile }
+! { dg-options "-std=f2018" }
+!
+! PR 85839: [F2018] warn for obsolescent features
+!
+! Contributed by Janus Weil <janus@gcc.gnu.org>
+
+block data                           ! { dg-warning "obsolescent feature" }
+  common /a/ y(3)                    ! { dg-warning "obsolescent feature" }
+  data y /3*1./
+end
+
+program f2018_obs
+
+  implicit none
+  integer :: a(10),b(10),j(8),i
+  real :: x(3)
+  common /c/ x                       ! { dg-warning "obsolescent feature" }
+
+  equivalence (a(10),b(1))           ! { dg-warning "obsolescent feature" }
+
+  do 99 i=1,10
+99 continue                          ! { dg-warning "obsolescent feature" }
+
+  j = (/ 0, 1, 2, 3, 4, 0, 6, 7  /)
+  forall (i=1:8, j(i) /= 0)          ! { dg-warning "obsolescent feature" }
+    j(i) = 0
+  end forall
+end