Re: [SNL] possibility to cut the argument string.

["Johnson, Andrew N. via Tech-talk" <tech-talk@aps.anl.gov>]

Hi Alexis,

On 4/15/19 10:21 AM, GAGET Alexis via Tech-talk wrote:

I have a SNL sequence with a lot of macro, i find the call in the iocshell really not readable

i.e :

seq myExample “macro1=MyExp:MyDevice-01:Unit, macro2=MyExp:MyDevice-02:Unit, macro3=MyExp:MyDevice-03:Unit, macro4=MyExp:MyDevice-04:Unit….To infinity and beyond”

 

Is there any way to maybe cut the string ?

i.e :

seq myExample “macro1=MyExp:MyDevice-01:Unit”+

“macro1=MyExp:MyDevice-02:Unit”+

“macro2=MyExp:MyDevice-03:Unit”+

“ macro3=MyExp:MyDevice-04:Unit”+

“….To infinity and beyond”

(of course it doesn’t work, I’ve tried different possibility but I haven’t found… maybe it’s obvious

 

I want my sequence as much generic as possible, so substitutions macros offers a good possibility to call differents PVs.

You could use an environment variable for that, like this:

epicsEnvSet exa        "macro1=MyExp:MyDevice-01:Unit"
epicsEnvSet exa "$(exa),macro2=MyExp:MyDevice-02:Unit"
epicsEnvSet exa "$(exa),macro3=MyExp:MyDevice-03:Unit"
epicsEnvSet exa "$(exa),macro4=MyExp:MyDevice-04:Unit"
seq myExample "$(exa), ... To infinity and beyond"

There are many similar ways you could create the argument string using variables; if you could re-use those macros elsewhere, for loading databases say, something like this might be more useful:

epicsEnvSet m1 "macro1=MyExp:MyDevice-01:Unit"
epicsEnvSet m2 "macro2=MyExp:MyDevice-02:Unit"
epicsEnvSet m3 "macro3=MyExp:MyDevice-03:Unit"
epicsEnvSet m4 "macro4=MyExp:MyDevice-04:Unit"
...
seq myExample "$(m1),$(m2),$(m3),$(m4), ... To infinity and beyond"

I'm sure you get the idea.

HTH,

- Andrew

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