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https://github.com/idris-lang/Idris2.git
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65 lines
1.7 KiB
Idris
65 lines
1.7 KiB
Idris
module Main
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import Control.Monad.Identity
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import Control.Monad.Trans
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import Data.Maybe
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import Data.String.Parser
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%default partial
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-- Build this program with '-p contrib'
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showRes : Show a => Either String (a, Int) -> IO ()
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showRes res = case res of
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Left err => putStrLn err
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Right (xs, rem) => printLn xs
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-- test lifting
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parseStuff : ParseT IO ()
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parseStuff = do a <- string "abc"
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lift $ putStrLn "hiya"
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b <- string "def"
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pure ()
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-- test a parsing from a pure function
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pureParsing : String -> Either String ((List Char), Int)
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pureParsing str = parse (many (satisfy isDigit)) str
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-- test option
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optParser : ParseT IO String
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optParser = do res <- option "" (takeWhile isDigit)
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string "def"
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pure $ res
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-- test optional
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maybeParser : ParseT IO Bool
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maybeParser = do res <- optional (string "abc")
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string "def"
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pure $ isJust res
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main : IO ()
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main = do
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res <- parseT parseStuff "abcdef"
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res <- parseT (string "hi") "hiyaaaaaa"
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case res of
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Left err => putStrLn "NOOOOOOO!"
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Right ((), i) => printLn i
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bad <- parseT (satisfy isDigit) "a"
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showRes bad
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bad2 <- parseT (string "good" <?> "Not good") "bad bad bad"
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showRes bad2
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digs <- parseT (many (satisfy isDigit)) "766775"
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showRes digs
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showRes $ pureParsing "63553"
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s <- parseT (takeWhile isDigit) "887abc8993"
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showRes s
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res <- parseT optParser "123def"
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showRes res
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res <- parseT optParser "def"
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showRes res
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res <- parseT maybeParser "abcdef"
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showRes res
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res <- parseT maybeParser "def"
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showRes res
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pure () |