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Re: What operator should perl5porters use for safe dereferencing?

by davido (Archbishop)
on May 29, 2012 at 18:17 UTC ( #973083=note: print w/ replies, xml ) Need Help??


in reply to What operator should perl5porters use for safe dereferencing?

We have the // and //= operators which work like a 'defined' short circuit, otherwise emulating || and ||=.

On your list of options I don't see ones that kind of stand out as being of similar encoding: //->, and -//>

The concerns are that they start looking like the closing side of a markup tag, and that the version I like the most would become Perl's only four-contiguous-character non-alpha operator (that I can think of).

What I don't like with respect to any of the ~ options is that they feel like they should be doing some form of matching: pattern, smart, or even dereferencing-lookup matching (which is what -> already does as it scans the inheritance tree).


Dave


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Re^2: What operator should perl5porters use for safe dereferencing?
by bobf (Monsignor) on Jun 06, 2012 at 15:37 UTC

    My thoughts, exactly. If such a beast were to arise, I would prefer that it be somewhat consistent (visually) with defined-or (even though we are trying to represent defined-and). I might be persuaded that something based on && would be suitable.

    IMO, many of the poll options resembled bitwise operations, matching, and the ternary operator too strongly.

Re^2: What operator should perl5porters use for safe dereferencing?
by Tux (Monsignor) on Jun 07, 2012 at 06:44 UTC

    That was my first hunch too, being a huge fan and user of the defined-or operator, but using that here would have been the opposite of what is required. What is suggested is a defined-and operator, which does not (yet) exist. For me that indeed rules out //-> and -//>. Think about it again when defined-or would be used :)


    Enjoy, Have FUN! H.Merijn

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