Re^4: Why doesn't Perl provide %_ as the hash equivalent of @_ in subs?

[ikegami]

It's possible to alias hash values.

$ perl -MData::Alias -E'
   @_ = ( a=>4 );
   alias %_ = @_;
   $_[1]=5; say $_{a};
   $_{a}=6; say $_[1];
'
5
6

However, copying args is a good thing. That's why we don't access @_ directly.