What happens when you want to have a method without any arguments in the middle of those other methods? This problem is the reason Aristotle used array references, I think.
A possible solution would be to "escape" the methods without arguments, yielding
my $window = Gtk2::Window->new( "toplevel" )->call_method_list(
signal_connect => [ delete_event => sub { Gtk2->main_quit } ],
set_title => "Test",
\'my_argumentless_method', # <---------------
set_border_width => 15,
add => Gtk2::Button->new( "Quit" )->call_method_list(
signal_connect => [ clicked => sub { Gtk2->main_quit } ] ),
\'show_all',
);
and change the implementation to (untested)
use Carp qw( croak );
sub UNIVERSAL::call_method_list {
my $target = shift;
while ( scalar @_ ) {
my $method = shift @_;
my @args = (ref $method) ? () : (ref($_[0]) eq 'ARRAY') ? @{shift}
+ : shift;
$method = $$method if ref $method;
eval { $target->$method( @args ) };
if( $@ ) { croak( $@ ) }
}
return $target;
}
ihb
Update: Apparently I should've read the code closer. The last case of a single method with no following element threw me off.
See perltoc if you don't know which perldoc to read!
Read argumentation in its context!
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