On Tue, 26 Oct 2010, Evan Carroll wrote:
Line 26 doesn't even have a default (line 26 starts my stock declaration)
has 'stock' => (
is => 'rw'
, isa => StockNo | Undef
, coerce => 1
, traits => ['String']
, handles => { 'include_in_exports' => 'append' }
);
That's what the warning is about. You don't provide a default so the
String native delegation trait provides a default for you (an empty
string).
The warning tells you how to avoid it.
As to why it's deprecated, we decided it's a bad idea for a variety of
reasons. Before 1.17, it actually simply caused an error if you provided a
builder (because it added a default and you can't have both). If you made
the attribute required, you still got a default default, which also made
no sense.
Only a few native delegation traits provided a default default, to make
things more confusing.
Overall, it was too much magic for no particular gain.
-dave
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