[ET Trac] #2579: CT_MultiLevel implicitly requires CT_Analytic

[Gabriele Bozzola]

#2579: CT_MultiLevel implicitly requires CT_Analytic

 Reporter: Gabriele Bozzola
   Status: new
Milestone: 
  Version: development version
     Type: bug
 Priority: major
Component: EinsteinToolkit thorn

I am trying to solve a Poisson equation with `CT_MultiLevel` but without including `CT_Analytic` \(which is advertised as an helper thorn\). I found that this cannot be done because `CT_MultiLevel` explicitly calls the restriction operations on grid functions defined in `CT_Analytic`. For example, in `CT_RelaxError.cc`:

```
      CT_Restrict(CCTK_PASS_CTOC, "CT_MultiLevel::psi"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_MultiLevel::coeffs"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testK"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testdxK"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testdyK"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testdzK"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testc1"); 
      CT_Restrict(CCTK_PASS_CTOC, "CT_Analytic::CT_testc2");
```

If you don’t have `CT_Analytic` as an active thorn, the run will abort. \(Are these restrictions needed?\)

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2579/ct_multilevel-implicitly-requires
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