Bug #107931 for Safe-Isa: conditional ->can() dispatch

Thu Oct 22 18:11:27 2015 ether [...] cpan.org - Ticket created

Subject:

conditional ->can() dispatch

Possible new API? (from #p5p, 2015-10-22) $obj->$_call_if_can('method_name') which would be equivalent to $obj->can('method_name') ? $obj->method_name : undef

Thu Oct 22 18:18:26 2015 DBOOK [...] cpan.org - Correspondence added

On Thu Oct 22 18:11:27 2015, ETHER wrote: Show quoted text

> Possible new API? (from #p5p, 2015-10-22) > > $obj->$_call_if_can('method_name') > which would be equivalent to $obj->can('method_name') ? $obj-

> >method_name : undef

Perhaps: $obj->$_can('method_name') ? $obj->method_name(@args) : undef or to avoid the second method call (?) if (my $method = $obj->$_can('method_name')) { $obj->$method(@args) } else { undef }

Thu Oct 22 18:18:26 2015 The RT System itself - Status changed from 'new' to 'open'

Thu Oct 22 18:35:55 2015 DBOOK [...] cpan.org - Correspondence added

On Thu Oct 22 18:18:26 2015, DBOOK wrote: Show quoted text

> On Thu Oct 22 18:11:27 2015, ETHER wrote:

> > Possible new API? (from #p5p, 2015-10-22) > > > > $obj->$_call_if_can('method_name') > > which would be equivalent to $obj->can('method_name') ? $obj-

> > > method_name : undef

> > > Perhaps: > $obj->$_can('method_name') ? $obj->method_name(@args) : undef > or to avoid the second method call (?) > if (my $method = $obj->$_can('method_name')) { $obj->$method(@args) } > else { undef }

There's a problem with context though; it should return () not undef in case $method is expected to return list context, but then there may be gotchas if using this in a hash constructor or list and $method is expected to return scalar context.

Thu Oct 22 18:56:49 2015 DBOOK [...] cpan.org - Cc DBOOK added

Thu Oct 19 09:16:57 2017 haarg [...] haarg.org - Correspondence added

Added in 1.000007, fixed in 1.000008.

Thu Oct 19 09:16:59 2017 haarg [...] haarg.org - Status changed from 'open' to 'resolved'