Seems like a use case for a default value. Check my syntax (following
the docs here: https://epics.anl.gov/base/R7-0/2-docs/msi.html) since I
don't often use defaults:
> #field(SIML, "$(test=test):SimulationMode")
Almost any value would work since the code is in a comment.
On 2019-08-07 10:28 AM, Kasemir, Kay via Tech-talk wrote:
> Hi:
>
> I think the reason is simply that macros are replaced way early, before the parser looks at the meaning of anything on a line.
> Macros can be anywhere within the database text.
> Macros can even include '#' for comments.
>
> record(calc, ramp)
> {
> $(C) field(SCAN, "1 second")
> field(CALC, "A+1")
> field(INPA, "ramp")
> }
>
> Running it like this "works", $(C) is replaced by <nothing>:
> softIoc -m "C=" -d test.db
>
> Running it like this comments the SCAN field line, and the record doesn't get scanned:
> softIoc -m "C=#" -d test.db
>
> Might consider it a feature, not a bug.
>
> -Kay
>
>
>
>
>
> From: [email protected] <[email protected]> on behalf of Alfio Rizzo via Tech-talk <[email protected]>
> Sent: Wednesday, August 7, 2019 11:17 AM
> To: [email protected] <[email protected]>
> Subject: [EXTERNAL] comment a field with a macro
>
>
> Hi,
> I see some strange behavior when I want to comment
> a field in a record if there there are different macros in it
> E.g.
>
> record(ai, "$(user):PiraniGauge") {
> field(DESC, "Readback form Pirani Gauge")
> field(EGU, "Torr")
> field(VAL, 4e-07)
> #field(SIML, "$(test):SimulationMode")
> }
>
>
> When then I load the db,
> I must defined also the macro $test even if I don’t use it (its commented),
> Otherwise I will get this warning from the iocsh
>
> …………
> macLib: macro test is undefined (expanding string # field(SIML, "$(test):SimulationMode")
> ………..
>
> i.e. I have to write
>
> dbLoadRecords("piranig.db","user=me, test=mytest")
>
> Is this normal ? why it does not skip the entire commented line ?
>
--
----------------------------------------------------------
Pete R. Jemian, Ph.D. <[email protected]>
Beam line Controls and Data Acquisition (BC, aka BCDA)
Advanced Photon Source, Argonne National Laboratory
Argonne, IL 60439 630 - 252 - 3189
-----------------------------------------------------------
Education is the one thing for which people
are willing to pay yet not receive.
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