RE: found a bug in 3.13.9 dbLoadTemplate - after all that time

["Chestnut, Ronald P." <ronc@slac.stanford.edu>]

 I agree with Marty on this. If the alternate behaviour is required (forgetting all previous macro definitions), separate dbLoadTemplate commands can be issued, each with its own "file" set.

/Ron Chestnut

-----Original Message-----
From: Marty Kraimer [mailto:mrk@aps.anl.gov] 
Sent: Wednesday, June 02, 2004 5:23 AM
To: kuner
Cc: tech-talk@aps.anl.gov
Subject: Re: found a bug in 3.13.9 dbLoadTemplate - after all that time

First I want to make sure I understand what you are saying.

If a substitution file contains

file test.template {
 { NAME="X", HOPR="9", LOPR="1"}
}
file test1.template {
 { NAME="Y" }
}

You are saying that any appearences of $(HOPR) or $(LOPR) in test1.template should NOT be expanded.

Both dbLoadTemplate and msi (Macro Substitution and Include) expand
$(HOPR) and $(LOPR) using the last definition they received. Thus in the above they will be expanded using HOPR="9", LOPR="1"

I can see either semantic definition being valid. Since the existing semantics have been in use for many years, it does not seem to be good idea to make a change. Many users may rely on the existing semantics.

Marty Kraimer

kuner wrote:

> Hi,
>
> Consider this templates:
>
> test.template
>
>  record(calc,"$(NAME):rdbk") {
>        field(DESC,"calculation")
>        field(SCAN,".5 second")
>        field(CALC,"A")
>        field(INPA,"$(NAME):rd .PP.NMS")
>        field(HOPR,"$(HOPR)")
>        field(LOPR,"$(LOPR)")
> }
>
> test.template
>
>  record(ai,"$(NAME):$(SNAME):rd") {
>      field(DESC,"position readback")
>      field(HOPR,"$(HOPR)")
>      field(LOPR,"$(LOPR)")
>  }
>
>
> and this substitution file:
>
> file test.template {
>  { NAME="X", HOPR="9", LOPR="1"}
> }
> file test1.template {
>  { NAME="Y" }
> }
>
> Remark: The substittutions $HOPR and $LOPR are used in both files, but 
> in the .substitution files it is forgotten for the second file, 
> test1.template.
>
> After the run of make dbloadTemplat will create:
>
> record(calc,"X:rdbk") {
>    field(DESC,"calculation")
>    field(SCAN,".5 second")
>    field(CALC,"A")
>    field(INPA,"X:rd .PP.NMS")
>    field(HOPR,"9")
>    field(LOPR,"1")
> }
> record(ai,"Y:$(SNAME):rd") {
>    field(DESC,"position readback")
>    field(HOPR,"9")
>    field(LOPR,"1")
> }
>
> HOPR and LOPR will be set in both records, so the last defined value 
> from the former substituted file will be used for the actual file.
> This is not correct.
>
> Grüssle Bernhard
>
> PS: the work I did when I found this was not such an easy EPICS database.
>