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Subject: Re: Empty string as SNL macro
From: Benjamin Franksen via Tech-talk <tech-talk@aps.anl.gov>
To: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Wed, 10 Jul 2019 15:21:52 +0200
Am 09.07.19 um 23:41 schrieb Hovanes Egiyan via Tech-talk:
> I would like to send an empty string as the value for an EPICS SNL
> program. But when I do it like this
> 
> seq testSequencer, "D=TOF,P="
> 
> the result is that the SNL code does not recognize that I override the
> default value of macro P
> (which is not an empty string). Is there a way to pass an empty string
> as the macro value to the
> sequencer program directly from the "seq" command without manipulating
> non-empty strings
> in the code itself?

It works if you say

seq testSequencer, "D=TOF,P=\"\""

I think this is a bug in the parser for the macro definition string.
Will try to fix.

Cheers
Ben

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Replies:
Re: Empty string as SNL macro Hovanes Egiyan via Tech-talk
Re: Empty string as SNL macro Benjamin Franksen via Tech-talk
References:
Empty string as SNL macro Hovanes Egiyan via Tech-talk

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