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

1 files changed, 12 insertions, 5 deletions

diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index b51206f..35795c3 100644
--- a/gcc/fortran/resolve.c
+++ b/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;