Re: Variable ontology (was: Q: Pointers in TCl)
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From           tom@neosoft.com (Tom Silva)
Organization   NeoSoft, Inc.
Date           2 Apr 1998 18:58:03 GMT
Newsgroups     comp.lang.tcl
Message-ID     <6g0n3r$guv$1@uuneo.neosoft.com>
References     1 2 3 4
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Cameron Laird (claird@Starbase.NeoSoft.COM) wrote:
> 2.  Who uses subst?  ...
>
>     ... compelling instance of subst-ing.  The two domains
>     that seem likely to me are some kind of CGI template
>     expansion, and processing of a configuration-speci-
>     fication-that-is-written-as-an-executable-script.

   I've only used subst with spec-as-script, and even then I -could- get
by with quotes and lots of escaped characters ... or redesign.  The subst
just makes for easier reading next time I'm forced to look at the code.

.m1 add command -label on     -command "yadda_on $name 1"
.m1 add command -label off    -command "yadda_on $name 0"
.m1 add command -label delete -command [subst -nocommands \
  {if {[my_msg $x $y "Delete yadda yadda $name?"] == "ok"} \
  {yadda_del $name}}]

   Yes, I could redesign and write yadda_del with the query inside it, then
just use -command "yadda_del $name".

   Compelling instance?  No.