It can't be enabled by default because this: 
sub foo($) { .... }

[download]
is both a valid signature and a valid prototype. So you have to explicitly tell perl which way to parse.

Dave.

In reply to Re: Modern Subroutine Signature Requires Perl Version by dave_the_m
in thread Modern Subroutine Signature Requires Perl Version by InfiniteSilence

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