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![1. Should Parser be functor?
YES
Why?
Parser<(Char, Char)>
to Parser<[Char]>
Parser<Character>
to Parser<Int> Explain
more?](https://image.slidesharecdn.com/parsercombinatorinswift-180425095503/85/Parser-combinator-in-swift-20-320.jpg)
![Many
123something parseDigit
many
something[‘1’,’2’, ‘3’]
something parseDigit something[]](https://image.slidesharecdn.com/parsercombinatorinswift-180425095503/85/Parser-combinator-in-swift-26-320.jpg)
![1. Should Parser be functor?
YES
Why?
Parser<(Char, Char)>
to Parser<[Char]>
Parser<Character>
to Parser<Int> Explain
more?](https://image.slidesharecdn.com/parsercombinatorinswift-180425095503/75/Parser-combinator-in-swift-20-2048.jpg)
![Many
123something parseDigit
many
something[‘1’,’2’, ‘3’]
something parseDigit something[]](https://image.slidesharecdn.com/parsercombinatorinswift-180425095503/75/Parser-combinator-in-swift-26-2048.jpg)
Uploaded byVijaya Prakash Kandel
Parser combinator in swift
This document discusses composing character parsers to build JSON parsers using combinators. It introduces a character parser that returns a parsed character and remaining input string. It shows how to combine parsers using andThen and orElse. It argues that the Parser type needs to be a functor to allow mapping over parsers, like converting a Parser of characters to a Parser of integers. This allows building parsers for numbers, strings, and expressions by combining smaller parsers.
![UiPath Automation Suite Installation (Hands-On) [2/3]](https://cdn.slidesharecdn.com/ss_thumbnails/automationsuitecommunitysession2-251015095633-a6d862f1-thumbnail.jpg?width=600ounds&width=560&fit=bounds)
Parser combinator in swift
- 1.
- 2. Agenda • Given acharacter parser can you make JSON parser?
- 3. Character parser • (String)-> (Character, String) • Parser consumes the parsed character from the string
- 4.
- 5. hParser feeding in theinput string. Pipe operator. Input is consumed
- 7. Generalising • Parser struct • To add typed functions
- 8. Parser Struct Input ParserExpectation Remaining Input
- 9.
- 10. Parsing 2 chars Parsedchars Remaining Input InputComposition
- 11.
- 12.
- 13. tChar AND uChar ’t’‘u’ (’t’, ‘u’)
- 14. 1. andThen Can weavoid this repetition? Pair
- 15.
- 16.
- 17. orElse T TorElse T TUorElse T
- 18.
- 19. digit Parser Wouldn’t itbe great to have Parser<Int>
- 20. 1. Should Parserbe functor? YES Why? Parser<(Char, Char)> to Parser<[Char]> Parser<Character> to Parser<Int> Explain more?
- 21. We need tomap Parser<T> -> Parser<U> Okay things have to be mappable? Thats what a functor is! Yo! Go on! Whatever!
- 22.
- 23.
- 24. 1,something keepLeft parse1 parseComma 1something keepLeft ->>
- 25. .123 keepRight parseDot parseDigit 123 keepRight >>-
- 26. Many 123something parseDigit many something[‘1’,’2’, ‘3’] somethingparseDigit something[]
- 27. Many1 something many1 parseDigit Failure Expected1 or many digit
- 28.
- 29.