my $class =
    $type == 0 ? 'ClassA' :
    $type == 1 ? 'ClassB' :
    'ClassC';
my $obj = $class->new( foo => 1, bar => 2 );

##</code><code>##

my %args = ( foo => 1, bar => 2 );
my $class = 
    $type == 0 ? ClassA->new( %args ) :
    $type == 1 ? ClassB->new( %args ) :
    'ClassC';

##</code><code>##

my $class;
given $type {
    when 0 { $class = ClassA }
    when 1 { $class = ClassB }
    default { $class = ClassC }
}
my $obj = $class.new( foo => 1, bar => 1 );

##</code><code>##

my @args = ( foo => 1, bar => 1 );
my $obj;
given $type {
    when 0 { $obj = ClassA.new( |@args ) }
    when 1 { $obj = ClassB.new( |@args ) }
    default { $obj = ClassC.new( |@args ) }
}