[ET Trac] [Einstein Toolkit] #1077: evaluate steered value as formula in AEIThorns::Trigger

[Einstein Toolkit]

#1077: evaluate steered value as formula in AEIThorns::Trigger
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  Reporter:  rhaas        |       Owner:                   
      Type:  enhancement  |      Status:  review           
  Priority:  minor        |   Milestone:                   
 Component:  Other        |     Version:                   
Resolution:               |    Keywords:  AEIThorn::Trigger
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Comment (by rhaas):

 One could make the code in src/eval.c part of the flesh I'd think. It does
 a bit more than the parameter evaluator since it also uses grid scalars as
 variables which is not always possible for parameters (since parameters
 are evaluated before the grid functions have storage for example).

 The other option would be to extract code from the beginning of
 src/main/Parameters.c/ParameterSet* to handle the different parameter
 types. This is more or less what the proposed patch does for trigger.

 If we make it part of the flesh I think it might be useful to expose the
 two halves (expression parsing and expression evaluation) separately just
 in case some one wants to apply this to a whole grid function.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1077#comment:4>
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