Replying to all. Sorry for the duplicate, Florian.

The fact that the constructor `PortNum` is exported has been argued to be a bug in past discussions. PortNumber is stored big endian, which leads to behaviors that people don't expect. I suggest you lean on the fact that PortNumber is an instance of the Num class:

ghci

...

> 478 :: PortNumber

478

Cheers,

Thomas

On Wed, Apr 10, 2013 at 12:26 AM, Florian Hofmann <fhofmann@techfak.uni-bielefeld.de> wrote:

I might be mistaken, but is there a bug in the Show instance of PortNum?

λ PortNum 1
256
λ PortNum 2

512
λ PortNum 3
768

λ let (PortNum x) = PortNum 10
λ x
10

Tested with network-2.4.1.2

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