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by gods
on Feb 11, 2000 at 00:06 UTC ( #3333=superdoc: print w/replies, xml ) Need Help??
For what it's worth, I think I prefer this syntax:
my $window = Gtk2::Window->new( "toplevel" )->call_method_list( signal_connect => [ delete_event => sub { Gtk2->main_quit } ], set_title => "Test", set_border_width => 15, add => Gtk2::Button->new( "Quit" )->call_method_list( signal_connect => [ clicked => sub { Gtk2->main_quit } ] ), 'show_all', );

Implementation follows:

use Carp qw( croak ); sub UNIVERSAL::call_method_list { my $target = shift; while ( scalar @_ ) { my $method = shift @_; my @args = (! scalar @_) ? () : (ref($_[0]) eq 'ARRAY') ? @{shift} + : shift; eval { $target->$method( @args ) }; if( $@ ) { croak( $@ ) } } return $target; }

P.S.: Unfortunately, if( $@ ) { require Carp; Carp::croak( $@ ) } won't work the way you want it to, because if Carp hasn't already been required, the process of loading it clears $@, so it's not available to the croak call. You could write it as if ( my $err = $@ ) { ... croak( $err) } but I think that in practice this technique will only be used in larger, non-trivial applications, so you might as well just require Carp up front.


In reply to Re: multiple method calls against the same object, revisited by simonm
in thread multiple method calls against the same object, revisited by Aristotle

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