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module Parser where | |
newtype Parser a = P { parse :: String -> [(a, String)] } | |
instance Functor Parser where | |
fmap g p = P (\inp -> case parse p inp of | |
[] -> [] | |
[(v, out)] -> [(g v, out)]) | |
instance Applicative Parser where |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
module Parser where | |
newtype Parser a = P { parse :: String -> [(a, String)] } | |
instance Functor Parser where | |
fmap g p = P (\inp -> case parse p inp of | |
[] -> [] | |
[(v, out)] -> [(g v, out)]) | |
instance Applicative Parser where |
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