Execute commands with unless on symbols

Execute commands with unless on symbols

[uzibalqa]

Have made a symbol 'go or `nogo and want to use an unless condition that only
executes some commands for the 'go condition.  How should the unless condition 
be constructed with the `nogo?

(defconst modust-statck 'go)

(unless modust-statck

RE: [External] : Execute commands with unless on symbols

[Drew Adams]

> (defconst modust-statck 'go)
> (unless modust-statck

Yes.  Doesn't that do what you ask?

On the other hand, `defconst' is specifically
intended to give the message to human readers
that neither humans nor code are expected to
change the value of the variable.  It's a
proclamation to human readers that the var is
really a constant.

And if it's really a constant, then why test
it (e.g. with `unless')?  Either you should
use `defvar' or you just do XYZ instead of
(unless modust-statck XYZ).  No?

RE: [External] : Execute commands with unless on symbols

[uzibalqa]

------- Original Message -------
On Saturday, October 8th, 2022 at 4:24 PM, Drew Adams <drew.adams@oracle.com> wrote:


> > (defconst modust-statck 'go)
> > (unless modust-statck
> 
> 
> Yes. Doesn't that do what you ask?
> 
> On the other hand, `defconst' is specifically intended to give the message to human readers that neither humans nor code are expected to change the value of the variable. It's a proclamation to human readers that the var is really a constant. And if it's really a constant, then why test it (e.g. with` unless')? Either you should
> use `defvar' or you just do XYZ instead of
> (unless modust-statck XYZ). No?

You are right.  Would work better if I can pass 'go or 'nogo to a function.  I would still
need the "(unless param".  With some "eq" declaration for 'nogo.