[ET Trac] #2758: conditional read/write statements

[Samuel Cupp]

#2758: conditional read/write statements

 Reporter: Samuel Cupp
   Status: new
Milestone: 
  Version: 
     Type: enhancement
 Priority: minor
Component: Cactus

Currently, if a function reads or writes variables only under certain conditions, proper scheduling within the schedule.ccl would require duplicating the entire function schedule for every possibility. As a simple example,

```
if(CCTK_EQUALS(EOS, "Tabulated")) {
  schedule func at bin
  {
    LANG: C
    READS: var1
    WRITES: var2, var3
  }
} else {
  schedule func at bin
  {
    LANG: C
    READS: var1
    WRITES: var2
  }
}
```

Instead, having the ability to set these conditionals within the function scheduling like

```
schedule func at bin
{
  LANG: C
  READS: var1
  WRITES: var2
  if(CCTK_EQUALS(EOS, "Tabulated")) {
    WRITES: var3
  }
}
```

would make this scheduling much more compact **and** more readable.

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2758/conditional-read-write-statements
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