1. Introducing Perl 6
Nuno Carvalho <smash@cpan.org>
May 22, 2010
Introducing Perl 6 Portuguese Perl Workshop 2010

2. Introduction
• Perl 6 is a specification
Introducing Perl 6 Portuguese Perl Workshop 2010

3. Introduction
• Perl 6 is a specification
• Several implementations
Introducing Perl 6 Portuguese Perl Workshop 2010

4. Introduction
• Perl 6 is a specification
• Several implementations
• Anything that passes the spec test
Introducing Perl 6 Portuguese Perl Workshop 2010

5. Introduction
• Perl 6 is a specification
• Several implementations
• Anything that passes the spec test
• Perl 6 is not a replacement for Perl 5
Introducing Perl 6 Portuguese Perl Workshop 2010

6. Perl6::Variables
• scalar values
1 $scalar
Introducing Perl 6 Portuguese Perl Workshop 2010

7. Perl6::Variables
• scalar values
1 $scalar
• arrays
1 @array
2 @array[$i]
Introducing Perl 6 Portuguese Perl Workshop 2010

8. Perl6::Variables
• scalar values
1 $scalar
• arrays
1 @array
2 @array[$i]
• hash tables
1 %hash
2 %hash{$key}
Introducing Perl 6 Portuguese Perl Workshop 2010

9. Perl6::Operators
• the assignment operator (=)
1 $string = ’Perl’;
Introducing Perl 6 Portuguese Perl Workshop 2010

10. Perl6::Operators
• the assignment operator (=)
1 $string = ’Perl’;
• the dot operator (.)
1 $object.method;
2 $file.lines;
3 @array.sort;
Introducing Perl 6 Portuguese Perl Workshop 2010

11. Perl6::Operators
• the list operator (,)
1 @array = 1, 2, 3, 4;
• the fat-arrow operator (=>)
1 $pair = ’color’ => ’black’;
2 $pair.key; # color
3 $pair.value; # black
Introducing Perl 6 Portuguese Perl Workshop 2010

12. Perl6::Operators
• string concatenation (˜)
1 ’Pe’ ˜ ’rl’; # Perl
Introducing Perl 6 Portuguese Perl Workshop 2010

13. Perl6::Operators
• string concatenation (˜)
1 ’Pe’ ˜ ’rl’; # Perl
• the max operator (max)
1 1 max 2; # returns 2
2 1 max 2 max 3; # returns 3
Introducing Perl 6 Portuguese Perl Workshop 2010

14. Perl6::Operators
• string concatenation (˜)
1 ’Pe’ ˜ ’rl’; # Perl
• the max operator (max)
1 1 max 2; # returns 2
2 1 max 2 max 3; # returns 3
• the reduction meta operator ([])
1 [max] 1, 2; # returns 2
2 [+] 1, 2; # returns 3
Introducing Perl 6 Portuguese Perl Workshop 2010

15. Perl6::Operators
• the repetition operator (x)
1 ’a’ x 3; # ’aaa’
Introducing Perl 6 Portuguese Perl Workshop 2010

16. Perl6::Operators
• the repetition operator (x)
1 ’a’ x 3; # ’aaa’
• the ternary operator (?? !!)
1 $n == 0 ?? ’zero’ !! ’non-zero’;
Introducing Perl 6 Portuguese Perl Workshop 2010

17. Perl6::Operators
• the repetition operator (x)
1 ’a’ x 3; # ’aaa’
• the ternary operator (?? !!)
1 $n == 0 ?? ’zero’ !! ’non-zero’;
• another list constructor (<>)
1 @week = <Mon Tue Wed Thu Fri>;
Introducing Perl 6 Portuguese Perl Workshop 2010

18. Perl6::Operators
• the yadayada operator (...)
1 sub do_something() { ... }
Introducing Perl 6 Portuguese Perl Workshop 2010

19. Perl6::Operators
• the yadayada operator (...)
1 sub do_something() { ... }
• the ternary operator (?? !!)
1 $n == 0 ?? ’zero’ !! ’non-zero’;
Introducing Perl 6 Portuguese Perl Workshop 2010

20. Perl6::Operators
• the yadayada operator (...)
1 sub do_something() { ... }
• the ternary operator (?? !!)
1 $n == 0 ?? ’zero’ !! ’non-zero’;
• the arrow operator (->)
1 for @week -> @day { ... }
Introducing Perl 6 Portuguese Perl Workshop 2010

21. Perl6::Subroutines
• typical subroutine
1 sub hello() {
2 say ’hello world’;
3 }
4
5 hello(); # says hello world
Introducing Perl 6 Portuguese Perl Workshop 2010

22. Perl6::Subroutines
• anonymous subroutine
1 my $hello = sub {
2 say ’hello world’;
3 }
4
5 $hello.(); # says hello world
Introducing Perl 6 Portuguese Perl Workshop 2010

23. Perl6::Subroutines
• passing values
1 sub hello($name) {
2 say "hello $name";
3 }
4
5 hello(’p6’); # says hello p6
Introducing Perl 6 Portuguese Perl Workshop 2010

24. Perl6::Subroutines
• passing a read-write reference
1 sub inc($counter is rw) {
2 $counter++;
3 }
4
5 my $c = 0;
6 inc($c); # $c is 1
7 inc($c); # $c is 2
Introducing Perl 6 Portuguese Perl Workshop 2010

25. Perl6::Subroutines
• passing a copy of value
1 sub inc($counter is copy) {
2 $counter++;
3 }
4
5 my $c = 0;
6 inc($c); # $c is 0
7 inc($c); # $c is 0
Introducing Perl 6 Portuguese Perl Workshop 2010

26. Perl6::Subroutines
• slurpy arguments
1 sub inc(*$counter is copy) {
2 XXX
3 }
4
5 XXX
Introducing Perl 6 Portuguese Perl Workshop 2010

27. Perl6::Subroutines
• passing a list
1 sub check(@words) { ... }
Introducing Perl 6 Portuguese Perl Workshop 2010

28. Perl6::Subroutines
• passing a list
1 sub check(@words) { ... }
• passing an hash
1 sub check(%hash) { ... }
Introducing Perl 6 Portuguese Perl Workshop 2010

29. Perl6::Multi
1 multi add(Real $x, Real $y) { ... }
2 multi add(Int $x, Int $y) { ... }
3 multi add($x, $y) { ... }
4 multi add($x where $x>0, $y) { ... }
Introducing Perl 6 Portuguese Perl Workshop 2010

30. Perl6::Objects
1 class Point {
2 has $!x;
3 has $!y;
4 has $.color;
5
6 method new($x, $y, $color) { ... }
7 method distance($x, $y) { ... }
8 }
Introducing Perl 6 Portuguese Perl Workshop 2010

31. Perl6::Roles
1 XXX
Introducing Perl 6 Portuguese Perl Workshop 2010

32. Perl6::Regexes
1 XXX
Introducing Perl 6 Portuguese Perl Workshop 2010

33. Perl6::Regexes
1 XXX
Introducing Perl 6 Portuguese Perl Workshop 2010

34. Perl6::Grammars
1 XXX
Introducing Perl 6 Portuguese Perl Workshop 2010

35. Rakudo
• one Perl 6 implementation
• passes 79% of the test spec
• runs on Parrot VM
• http://www.rakudo.org
Introducing Perl 6 Portuguese Perl Workshop 2010

36. Get your feet wet
• install rakudo
1 $ git clone ...
2 $ perl Configure.pl --gen-parrot
3 $ make
4 $ make test
5 $ make spectest
Introducing Perl 6 Portuguese Perl Workshop 2010

37. Run Perl 6 code
• interactive mode
1 rakudo$ ./perl6
2 > say ’hello world’;
3 hello world
Introducing Perl 6 Portuguese Perl Workshop 2010

38. Run Perl 6 code
• interactive mode
1 rakudo$ ./perl6
2 > say ’hello world’;
3 hello world
• execute scripts
1 rakudo$ cat hello.p6
2 say ’hello world’;
3 rakudo$ ./perl6 hello.p6
4 hello world
Introducing Perl 6 Portuguese Perl Workshop 2010

39. Thanks
• Perl 6
• Parrot
• Rakudo
• Perl 6 Book
Introducing Perl 6 Portuguese Perl Workshop 2010

40. Conlusion
• we haven’t seen everything
Introducing Perl 6 Portuguese Perl Workshop 2010

41. Conlusion
• we haven’t seen everything
• spec is still under development
Introducing Perl 6 Portuguese Perl Workshop 2010

42. Conlusion
• we haven’t seen everything
• spec is still under development
• implementations still under development
Introducing Perl 6 Portuguese Perl Workshop 2010

43. Conlusion
• we haven’t seen everything
• spec is still under development
• implementations still under development
• http://www.perl6.org
Introducing Perl 6 Portuguese Perl Workshop 2010

44. Conlusion
• we haven’t seen everything
• spec is still under development
• implementations still under development
• http://www.perl6.org
• .. available in a Christmas near you
Introducing Perl 6 Portuguese Perl Workshop 2010

45. The End
Questions?
Introducing Perl 6 Portuguese Perl Workshop 2010