Perl 6 Regex

features and syntax of the new reformed Perl Regular Expression

Transcript

1. Perl 6 regex
2. Perl 6 regex In search for perfection
3. Much is Gone
4. Something Stayed ops: m//, s/// , tr/// mods: i, g capturing: (…) escape: \ quantifier: *, +, ? min. match. suffix: ??, *?, +? alternatives: | match var.: $1 .. $9
5. Operators
6. Create A Regex rx/.../
7. It's The New qr// rx/.../
8. Apply Rx ~~
9. Known Since 5.10 ~~
10. Still Changing In 5.18 ~~
11. Apply Rx ~~ no more =~
12. Known Operators m// s///
13. Rx Methods match comb subst
14. New Operators ms// ss///
15. Aliases For: m :s// s :ss///
16. Modifiers
17. Modifiers no x
18. Modifiers no x m s
19. Modifiers no s e x
20. Modifiers no s ee x
21. Modifiers P5 Perl5
22. Modifiers :P5 :Perl5
23. Modifiers ~~ m :P5 /.../
24. Match All :g :global
25. Match n Times :x(n)
26. Just nth Match :nth(n)
27. Search from Pos On :c(n) :continue(n)
28. Search Only On Pos :p(n) :pos(n)
29. Spaces Have Meaning :s :sigspace :ss :samespace
30. Like qw// Only Smarter :s :sigspace :ss :samespace
31. Lower Line Is For s/// :s :sigspace :ss :samespace
32. Modifiers :i :ignorecase :ii :samecase
33. Modifiers :m :ignoremark :mm :samemark
34. Choose A Level :bytes :chars :codes :graphs
35. Metachar
36. Metachar .
37. Metachar . any char
38. Metachar .
39. Metachar .
40. No Output In Perl 5 perl -e 'print 1 if "\n"=~ /./
41. Do Output In Perl 6 perl6 -e 'say 1 if "\n"~~ /./
42. Metachar . any char
43. Metachar \N not a newline
44. Metachar ^ $ You know that
45. Metachar ^^ $$ linewise
46. 'a' Wins In Perl 5 perl -E '"ab"=~ /(a|ab)/;say $1'
47. 'ab' Wins In Perl 6 perl6 -E '"ab"~~/(a|ab)/;say $0'
48. Metachar | longest wins
49. Metachar || first wins
50. Metachar () capt. groups
51. Metachar [ ] nonecapturing groups
52. Metachar <[ ]> char classes
53. Metachar \s space
54. Metachar \s = \h | \v horizont. or vertic.
55. Metachar \s = \h | \v \r \n and alike
56. Metachar \s = \h | \v Spaces, tabs(\t) and alike
57. Quantifiers
58. Quantifiers simple have not changed
59. Five Digits \d ** 5
60. Five Digits \d ** 5 '12345'
61. Two to Five Digits \d ** 2..5
62. Colon Seperated Digits \d+ % ','
63. Colon Seperated Digits \d+ % ',' '1,2,3,4'
64. + Trailing Seperator \d+ %% ',' '1,2,3,4,'
65. Combined \d ** 2..* % ','
66. Special Var
67. Match Object $/ last sucessful Match
68. Named Submatch $/ $/<...>
69. Named Submatch $/ $/{'...'} $<...>
70. List Of Matches @()
71. List Of Matches @() @() = $0 ..
72. List Of Matches @()[n] @() = $0 .. (no limit)
73. AoA Of Matches @()[1][2] .(.).(.(.).(.).(...).).
74. Learn More http://perlcabal.org /syn/S05.html
75. Thank You