[Larceny-users] Request: port-closed?

[Derick Eddington]

I need something which tells whether a port is closed or not. Does it
already exist and I couldn't find it? If not, I request it be added.
Ikarus, PLT, and Ypsilon provide it as port-closed?. I tried hacking a
temporary version by catching exceptions but that doesn't seem possible
without side-effecting the ports.

Thanks,

[Derick Eddington]

Post by Derick Eddington
I need something which tells whether a port is closed or not. Does it
already exist and I couldn't find it? If not, I request it be added.
Ikarus, PLT, and Ypsilon provide it as port-closed?. I tried hacking a
temporary version by catching exceptions but that doesn't seem possible
without side-effecting the ports.

I think I'm going to use (not (or (input-port? port) (output-port?
port))) to determine if a port is closed, unless there's a problem with
that?

[William D Clinger]

Post by Derick Eddington
I think I'm going to use
(not (or (input-port? port) (output-port? port)))
to determine if a port is closed...

That works in Larceny. I assume you're talking about a
Larceny-specific definition.

Will

[Derick Eddington]

Post by William D Clinger

Post by Derick Eddington
I think I'm going to use
(not (or (input-port? port) (output-port? port)))
to determine if a port is closed...

That works in Larceny. I assume you're talking about a
Larceny-specific definition.

Yes. Thanks.