[ET Trac] [Einstein Toolkit] #1961: Carpet treats prolongation_operator=none as prolongation_operator=sync

[Einstein Toolkit]

#1961: Carpet treats prolongation_operator=none as prolongation_operator=sync
-------------------------+--------------------------------------------------
 Reporter:  rhaas        |       Owner:  eschnett           
     Type:  enhancement  |      Status:  new                
 Priority:  minor        |   Milestone:                     
Component:  Carpet       |     Version:  development version
 Keywords:               |  
-------------------------+--------------------------------------------------
 Currently Carpet treats a user set prolongation operator of "none" the
 same as "sync" (see line 2187 of SetupGH.cc in the
 {{{get_transport_operator}}} routine:
 {{{
   if (CCTK_Equals(prolong_string, "none")) {
     // This would surprise too many people
     // return op_none;
   } else if (CCTK_Equals(prolong_string, "sync")) {
     return op_sync;
 }}}
 It would however sometimes be useful to actually have a prolongation
 operator that does nothing so that one can leave in the SYNC statements in
 the schedule (which cannot be made conditional) and switch a variable from
 being correctly computed everywhere to being correct only in the interior
 of the components if this variable is eg only for diagnostics and one can
 avoid inspecting the incorrect values at the borders.

 I would thus like to introduce a new prolongation operator string
 "no_synchronization" that should do what "none" claimed to do and would
 internally actually be translated into {{{op_none}}}. Or alternative make
 "none" map to "op_none" again but then this may surprise people once more.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1961>
Einstein Toolkit <http://einsteintoolkit.org>
The Einstein Toolkit