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Postings from June 2019
On Mon, Jun 10, 2019 at 10:22:09AM -0400, Matthew Horsfall (alh) wrote:
> On Wed, Jun 5, 2019 at 5:30 AM Dave Mitchell <davem@iabyn.com> wrote:
> > At the moment its reasonably clear that where you explicitly use the '.'
> > operator (and double-quoted strings, which are syntactic sugar for
> > concatenation) you should expect concat overloading to be honoured.
> [...]
> >
> > We should keep a clear distinction between:
> >
> > concat operator '.' appears in the source code
> >
> > and
> >
> > perl concatenates two strings for some reason.
>
> To me "" seems like the latter, not the former.
>
> This is probably documented somewhere but I find it surprising that
> "$foo" calls concat overloading on $foo before string overloading.
I'm not sure I follow. "$foo" calls '""' overloading, not '.':
This:
use overload
'""' => sub { print "STRFY($_[0][0])\n"; $_[0][0] },
'.' => sub { print "CONCAT$_[0][0], $_[1][0])\n";
bless [ $_[0][0] . $_[1][0] ] }
;
my $s = bless [ "foo" ];
my $t = "$s";
outputs:
STRFY(foo)
--
Diplomacy is telling someone to go to hell in such a way that they'll
look forward to the trip
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