Re: Stringification in Net::IPAddress::Util

[email protected] (Reini Urban)
Newsgroups perl.module-authors
Message-ID <[email protected]>
> On Aug 17, 2017, at 6:56 PM, Paul Bennett <[email protected]> wrote:
> 
> Hi, All,
> 
> Quick sanity check, if you please.
> 
> Before I start to trying to merge my perl5 Net::IPAddress::Util into
> bradclawsie's perl6 IP::Parse, I want to make sure I'm not being crazy
> with the way stringification and cmp are overloaded.
> 
> IP Addresses exist "on the wire" and naturally sort as 128-bit
> Network-Order numbers.
> 
> IP Addresses are naturally read & written by humans as strings.
> 
> To accommodate both these things, Net::IPAddress::Util overloads '""'
> as stringification and <=> as N128-ification (well, actually the
> technobabble is deeper, but that's what it amounts to).
> 
> The tricky bit is the overloading of the cmp operator.
> 
> Since perl5 (and IIRC perl6) uses cmp by default in the sort code
> block, my assumption has always been "if people are sorting IP
> Addresses they want to sort 'naturally' according to the sensible
> semantics", so cmp has been overloaded to do the same thing as <=>.
> 
> Is this indeed DWIM, or is it insane troll logic?

Sounds about right to me.
Sort by numeric value, not by the stringification.
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