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Postings from August 2021
On Mon, Aug 30, 2021 at 10:02 AM Yuki Kimoto <kimoto.yuki@gmail.com> wrote:
>
> 2021-8-30 14:12 Dan Book <grinnz@gmail.com> wrote:
>
>> On Mon, Aug 30, 2021 at 1:09 AM Yuki Kimoto <kimoto.yuki@gmail.com>
>> wrote:
>>
>> Imported symbols override builtins already, this is how modules like
>> autodie and Time::HiRes work. But yes, this chance of collision is
>> unavoidable and we have to take more care with more common names.
>>
>> -Dan
>>
>
> > Imported symbols override builtins already
>
> Is this really?
>
> perl -E 'sub substr { print "substr\n" }; substr();'
>
> Output
>
> Not enough arguments for substr at -e line 1, near "substr()"
> Execution of -e aborted due to compilation errors.
>
> Imported symbols don't seem to override CORE::substr,
>
That's not actually imported though.
$ perl -E 'BEGIN { package foo; *::substr=sub { print "substr\n" } }
substr();'
substr
$
Yes, it needs that package declaration …
Eirik
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