enable non-integer ranges as indices by default and deprecate preference * octave.cc (maximum_braindamage): Don't call Fdo_brainded_shortcircuit_evaluation. * error.cc (initialize_default_warning_state): Don't set Octave:noninteger-range-as-index to "error". * octave.cc (maximum_braindamage): Don't call Fallow_noninteger_range_as_index. Don't set Octave:noninteger-range-as-index to "on". * ov-range.h, ov-range.cc (Vallow_noninteger_range_as_index): Now static. Set default value to true. * ov.h (octave_value::index_vector): New arg, require_integers. * ov-base.cc, ov-base.h (octave_value::index_vector): Likewise. * ov-base-diag.cc, ov-base-diag.h, ov-bool-mat.h, ov-bool-sparse.h, ov-bool.h, ov-ch-mat.cc, ov-ch-mat.h, ov-class.cc, ov-class.h, ov-colon.h, ov-complex.h, ov-float.h, ov-flt-re-mat.h, ov-intx.h, ov-lazy-idx.h, ov-perm.cc, ov-perm.h, ov-range.cc, ov-range.h, ov-re-mat.h, ov-re-sparse.cc, ov-re-sparse.h, ov-scalar.h: Make corresponding changes in all derived methods. * ov-range.cc (octave_range::index_vector): If new require_integers argument is true, also require integer arguments regardless of the setting of Vallow_noninteger_range_as_index. * utils.cc (Fisindex): Don't temporarily set Vallow_noninteger_range_as_index. Call index_vector with argument of true. * NEWS: Mention change in default value, warning state and deprecated function.

--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,17 @@
 
     is now enabled by default.
 
+ ** The preference
+
+      allow_noninteger_range_as_index
+
+    is now enabled by default and the warning ID
+
+      Octave:noninteger-range-as-index
+
+    is now set to "on" by default instead of "error" by default and "on"
+    for --traditional.
+
  ** Other new functions added in 4.0.0:
 
     validateattributes
@@ -29,6 +40,7 @@
     be removed from Octave 4.4 (or whatever version is the second major
     release after 4.0):
 
+      allow_noninteger_range_as_index
       do_braindead_shortcircuit_evaluation
 
 ---------------------------------------------------------