re PR fortran/16907 (Non-integer array indices rejected)

fortran/
PR fortran/16907
* resolve.c (gfc_resolve_index): Allow REAL indices as an extension.

testsuite/
PR fortran/16907
* gfortran.dg/real_index_1.f90: New test.

From-SVN: r96385

gcc/fortran/ChangeLog

 2005-03-13  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
 
+	PR fortran/16907
+	* resolve.c (gfc_resolve_index): Allow REAL indices as an extension.
+
+2005-03-13  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
+
 	PR fortran/20323
 	* resolve.c (gfc_resolve): Check if character lengths are
 	specification expressions.

gcc/fortran/resolve.c

@@ -1701,19 +1701,26 @@ gfc_resolve_index (gfc_expr * index, int check_scalar)
   if (gfc_resolve_expr (index) == FAILURE)
     return FAILURE;
 
-  if (index->ts.type != BT_INTEGER)
+  if (check_scalar && index->rank != 0)
     {
-      gfc_error ("Array index at %L must be of INTEGER type", &index->where);
+      gfc_error ("Array index at %L must be scalar", &index->where);
       return FAILURE;
     }
 
-  if (check_scalar && index->rank != 0)
+  if (index->ts.type != BT_INTEGER && index->ts.type != BT_REAL)
     {
-      gfc_error ("Array index at %L must be scalar", &index->where);
+      gfc_error ("Array index at %L must be of INTEGER type",
+		 &index->where);
       return FAILURE;
     }
 
-  if (index->ts.kind != gfc_index_integer_kind)
+  if (index->ts.type == BT_REAL)
+    if (gfc_notify_std (GFC_STD_GNU, "Extension: REAL array index at %L",
+			&index->where) == FAILURE)
+      return FAILURE;
+
+  if (index->ts.kind != gfc_index_integer_kind
+      || index->ts.type != BT_INTEGER)
     {
       ts.type = BT_INTEGER;
       ts.kind = gfc_index_integer_kind;

gcc/testsuite/ChangeLog

+2003-03-13  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
+
+	PR fortran/16907
+	* gfortran.dg/real_index_1.f90: New test.
+
 2005-03-13  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
 
 	PR fortran/20323

gcc/testsuite/gfortran.dg/real_index_1.f90

+! { dg-do run }
+! PR 16907 : We didn't support REAL array indices as an extension
+       integer I, A(10)
+       A = 2
+       I=A(1.0) ! { dg-warning "Extension" }
+       if (i/=2) call abort ()
+       end