DSL in Clojure

1. DSL in Clojure Misha Kozik @mishadoff

2. developers domain experts

3. developer domain expert Badass Guys developers domain experts

4. developer domain expert Badass Guys developers domain experts “DSL-powered”  Badass Guys

5. not Turing Complete

6. SQL select statement DSL

7. SQL DSL query plan

8. SQL algorithms DSL

9. SQL DSL nested loop join #1 #2 #1 Outer Inner #3 #1 #2 #1 #3 #4

10. SQL DSL nested loop join #1 #2 #1 Outer Inner #3 #1 #2 #1 #3 #4

11. SQL DSL hash join #1 #2 #1 Outer Inner (hashed) #3 #1 #2 #3 #2 #1 #4 cd632f 0980eb 48b5d4

12. SQL DSL hash join #1 #2 #1 Outer Inner (hashed) #3 #1 #2 #3 #2 #1 #4 cd632f 0980eb 48b5d4

13. SQL DSL merge join #106 #123 Outer (sorted) Inner (sorted) #133 #106 #106 #117 #123

14. SQL DSL merge join #106 #123 Outer (sorted) Inner (sorted) #133 #106 #106 #117 #123

15. SQL DSL it’s just a join

16. SQL-on-Everything LINGUAL CASCADING

17. Hiccup DSL

18. Hiccup DSL

19. Hiccup DSL

20. Hiccup DSL

21. Lein DSL

22. Binary Tree

23. Binary Tree

24. Internal DSL: Tree Clojure way head left child right child

25. Internal DSL: Tree Java way

26. External DSL: Tree wow, such declarative Do not read this code! Domain Expert way

27. Generative DSL: Macros excerpt macro from core.async

28. Instaparse What if context-free grammars were   as easy to use as regular expressions?

29. Context-Free Grammar

34. Balanced Parens Example

35. Balanced Parens Example

36. Clojure is a functional programming language better than java English Grammar Example

37. English Grammar Example Named Entity Recognition Kiev is the capital of Ukraine Entity:City Entity:Country

38. English Grammar Example Sentiment Analysis

39. SQL-2003 Grammar Example 1300+ rules http://savage.net.au/SQL/sql-2003-2.bnf

40. Integration Story

42. Grouping Metric

43. Grouping Metric

44. Grouping Metric DSL to deﬁne formula

48. JVM Why Clojure?

49. Lisp Why Clojure?

50. Code is Data Why Clojure?

51. Immutable Why Clojure?

52. REPL Why Clojure?

53. Practical Why Clojure?

54. Community Why Clojure?

55. Parser Development

56. insta/transform Development

57. insta/transform Development

58. Syntax Error Exception Handling

59. Tree Tests Testing Expected Actual

60. Starting Rule Testing Isolated Parsing

61. Performance Tests Testing clojure.test does not support timeouts, write by yourself

62. Ambiguity Tests Testing instaparse is able to handle ambiguity grammars though, still good to know where we behave poorly

63. Use Cases Tests Testing Year over Year growth

64. Interface Java Integration

65. clojure-maven-plugin Java Integration

66. Demo Time

67. ANTLR Alternatives http://stackoverﬂow.com/questions/1931307/antlr-is-there-a-simple-example

68. parboiled Alternatives

69. Lessons Learned

70. Lessons Learned #1 Too Much Rules100+ rules, possible to reduce to 50

71. Lessons Learned #2 Lein and Maven are not friends

72. Lessons Learned #3 Code Coverage not integrated

73. Lessons Learned #4 Versioning as a library

74. Lessons Learned #5 Evaluation is not a parser responsibility

75. Questions?

DSL in Clojure

DSL in Clojure

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