decl.c (match_byte_typespec): New function.

2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>

	* decl.c (match_byte_typespec): New function.  Match BYTE type-spec.
	(gfc_match_decl_type_spec): Use it.

2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.dg/byte_3.f: New test.
	* gfortran.dg/byte_4.f90: Ditto.

From-SVN: r277715

gcc/fortran/ChangeLog

 2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>
 
+	* decl.c (match_byte_typespec): New function.  Match BYTE type-spec.
+	(gfc_match_decl_type_spec): Use it.
+
+2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>
+
 	PR fortran/90988
 	* decl.c (gfc_match_private, gfc_match_public): Fixed-form source code
 	does not require whitespace between PRIVATE (or PUBLIC) and an entity.

gcc/fortran/decl.c

@@ -3980,6 +3980,38 @@ error_return:
 }
 
 
+/* Match a legacy nonstandard BYTE type-spec.  */
+
+static match
+match_byte_typespec (gfc_typespec *ts)
+{
+  if (gfc_match (" byte") == MATCH_YES)
+    {
+      if (!gfc_notify_std (GFC_STD_GNU, "BYTE type at %C"))
+	return MATCH_ERROR;
+
+      if (gfc_current_form == FORM_FREE)
+	{
+	  char c = gfc_peek_ascii_char ();
+	  if (!gfc_is_whitespace (c) && c != ',')
+	    return MATCH_NO;
+	}
+
+      if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
+	{
+	  gfc_error ("BYTE type used at %C "
+		     "is not available on the target machine");
+	  return MATCH_ERROR;
+	}
+
+      ts->type = BT_INTEGER;
+      ts->kind = 1;
+      return MATCH_YES;
+    }
+  return MATCH_NO;
+}
+
+
 /* Matches a declaration-type-spec (F03:R502).  If successful, sets the ts
    structure to the matched specification.  This is necessary for FUNCTION and
    IMPLICIT statements.
@@ -4012,22 +4044,10 @@ gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
   /* Clear the current binding label, in case one is given.  */
   curr_binding_label = NULL;
 
-  if (gfc_match (" byte") == MATCH_YES)
-    {
-      if (!gfc_notify_std (GFC_STD_GNU, "BYTE type at %C"))
-	return MATCH_ERROR;
-
-      if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
-	{
-	  gfc_error ("BYTE type used at %C "
-		     "is not available on the target machine");
-	  return MATCH_ERROR;
-	}
-
-      ts->type = BT_INTEGER;
-      ts->kind = 1;
-      return MATCH_YES;
-    }
+  /* Match BYTE type-spec.  */
+  m = match_byte_typespec (ts);
+  if (m != MATCH_NO)
+    return m;
 
   m = gfc_match (" type (");
   matched_type = (m == MATCH_YES);

gcc/testsuite/ChangeLog

 2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>
 
+	* gfortran.dg/byte_3.f: New test.
+	* gfortran.dg/byte_4.f90: Ditto.
+
+2019-11-01  Steven G. Kargl  <kargl@gcc.gnu.org>
+
 	PR fortran/90988
 	* gfortran.dg/pr90988_4.f: New test.
 

gcc/testsuite/gfortran.dg/byte_3.f

+c { dg-do run }
+c { dg-options "-std=legacy" }
+      bytea
+      a = 1
+      if (a /= 1 .and. kind(a) /= a) stop 1
+      end

gcc/testsuite/gfortran.dg/byte_4.f90

+! { dg-do compile }
+! { dg-options "-w" }
+      bytea          ! { dg-error "Unclassifiable statement" }
+      byte b
+      byte :: d
+      a = 1
+      b = 1
+      d = 1
+      print *, a, b * d
+      end