Re: use experimental 'autoderef'; ???

Looks like a doc bug:

perl -v
This is perl 5, version 24, subversion 1 (v5.24.1)
[download]

On the CLI:

perldoc experimental
[download]

After searching for "autoderef":

The supported features, documented further below, are:

    array_base - allow the use of $[ to change the starting index of @
+array
    autoderef  - allow push, each, keys, and other built-ins on refere
+nces
    ...
[download]

Online, however, searching for "perldoc experiment" (resulting doc: experiment):

Array and hash container functions accept references

Using this feature triggered warnings in the category experimental::au
+toderef .

Superseded by Postfix dereference syntax.

Introduced in Perl 5.14.0

Removed in Perl 5.24.0
[download]

There was definitely a good long period where autoderef was in play, but there was the postderef camp as well. The fight was won by the postderef camp. It was a drawn out ordeal ;)

update: I may be missing what you're getting at here, but either way, something doesn't line up.

updte2: Since it was so long ago, I don't recall the arguments on each side I had, but iirc, postderef was better for longevity, but I'm still old-school. I write all of my code so it runs on 5.8.9... no magic for me.

Comment on Re: use experimental 'autoderef'; ??? Select or Download Code

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Re^2: use experimental 'autoderef'; ??? by Eily (Monsignor) on Jun 29, 2017 at 09:46 UTC
I don't recall the arguments on each side There are probably many more arguments for both sides, but I remember reading somewhere that one of the reasons postderef won is that some of the function concerned by the autoderef feature work on either hashes or arrays. So with `each $hash{THING};`, if %hash is empty, the target of each could either be autovivified into a hash or an array, or this could throw an error. But there's also `keys $obj;` where $obj can overload the dereferencing operators @{} and %{} and perl would have to choose which one to call (or again, throw an error). `each $hash{RUD}->@* or each $obj->%*` leaves no such ambiguity.	[reply] [d/l] [select]
Re^2: use experimental 'autoderef'; ??? by tobyink (Canon) on Jun 29, 2017 at 05:44 UTC
There was definitely a good long period where autoderef was in play, but there was the postderef camp as well. The fight was won by the postderef camp. It was a drawn out ordeal ;) Both camps should die in fire.	[reply]


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