[ET Trac] [Einstein Toolkit] #223: Make declaration of CCTK_ARGUMENTS safer

[Einstein Toolkit]

#223: Make declaration of CCTK_ARGUMENTS safer
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  Reporter:  eschnett     |       Owner:        
      Type:  enhancement  |      Status:  review
  Priority:  minor        |   Milestone:        
 Component:  Cactus       |     Version:        
Resolution:               |    Keywords:        
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Comment (by eschnett):

 Casting away const in C++ is done one a few occasions; const_cast<>() is a
 good way to do so.

 In Cactus, we need to cast away const in thorn CartGrid3D (when setting
 cctk_delta_space) and in thorn time (when setting cctk_delta_time). Both
 are inelegant, and should be replaced by a flesh API instead. However,
 what we currently have works. And since it only involves C, it is safe, as
 Roland explains.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/223#comment:6>
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