substitution.pl

# this works

use Class::Load 0.20 'load_class';

my $var = 'baz';

my $class = 'Foo::Bar';

my $result = load_class( $class )->class_method( $var ); # works wonders with ->new

# sometimes this will work, but not always. Try this with the various Dumper functions and see which ones work.

use Module::Load 'load';

my $package = 'Foo::Bar';

load $package, 'function';

my $result = function( $var ); # seems to only work if Foo::Bar's exporter works right, many packages have to be exported at compile time not runtime

# perl doesn't like stuff like this or really anything where I've tried substituting the package name into calling a function. at least not with strict on. This is a large reason I'd avoid functional interfaces. They are hard to substitute at runtime. Maybe I just don't know a good way to do it, without disabling strict, feel free to enlighten me.

load( $package );

my $function = $package . '::' . 'function';

$function->( $var );