sub infix:<!*> (&f, &g) {
        return sub ($x)  {
                return f(g($x));
        };
}

##</code><code>##

sub test ($x) {
        return $x ~ " test";
}


# outputs (&test !* &test) test test
say (&test !* &test)('&test !* &test');

##</code><code>##

# Fails with too much recursion
say (&test !* (&test !* &test))('&test !* &test !* &test');

##</code><code>##

my $p = &test !* &test;
my $q = $p !* &test;
# outputs $p = &test !* &test test
say $p('$p = &test !* &test');
#should be $p !* test test test (?),  but says $p !* test test
say $q('$p !*  &test');

##</code><code>##

function comp(f, g){
        return function(x){
                return f(g(x));
        }
}

function test(x){
        return x + " test";
}

print (comp(test,comp(test,test))("test "));

##</code><code>##

sub comp {
        $f = shift;
        $g = shift;
        return sub {
                $x = shift;
                return $f->($g->($x));
        };
}
sub test {
        return (shift) . " test";
}
print comp(\&test, comp(\&test,\&test))->("test ");                                                                               

##</code><code>##

sub comp {
        my ($f, $g) = @_;
        return sub {
                my $x = shift;
                return $f->($g->($x));
        };
}
sub test {
        return (shift) . " test";
}
print comp(\&test, comp(\&test,\&test))->("test ");