mirror of
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503a1db4be
This commit clarifies license of the software replacing “BSD3” with more conventional “BSD 3 clause”. Another change is addition of the third clause originally missing in license of Parsec (which is licensed under BSD 2 clause license). The addition of the third clause in form: * Neither the names of the copyright holders nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. does not violate original BSD 2 clause license effectively making it BSD 3 clause license (which I find preferable).
230 lines
9.6 KiB
Haskell
230 lines
9.6 KiB
Haskell
-- -*- Mode: Haskell; -*-
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--
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-- QuickCheck tests for Megaparsec's generic parser combinators.
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--
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-- Copyright © 2015 Megaparsec contributors
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--
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-- Redistribution and use in source and binary forms, with or without
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-- modification, are permitted provided that the following conditions are
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-- met:
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--
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-- * Redistributions of source code must retain the above copyright notice,
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-- this list of conditions and the following disclaimer.
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--
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-- * Redistributions in binary form must reproduce the above copyright
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-- notice, this list of conditions and the following disclaimer in the
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-- documentation and/or other materials provided with the distribution.
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--
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-- * Neither the names of the copyright holders nor the names of
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-- contributors may be used to endorse or promote products derived from
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-- this software without specific prior written permission.
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--
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-- This software is provided by the copyright holders “as is” and any
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-- express or implied warranties, including, but not limited to, the implied
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-- warranties of merchantability and fitness for a particular purpose are
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-- disclaimed. In no event shall the copyright holders be liable for any
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-- direct, indirect, incidental, special, exemplary, or consequential
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-- damages (including, but not limited to, procurement of substitute goods
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-- or services; loss of use, data, or profits; or business interruption)
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-- however caused and on any theory of liability, whether in contract,
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-- strict liability, or tort (including negligence or otherwise) arising in
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-- any way out of the use of this software, even if advised of the
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-- possibility of such damage.
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module Combinator (tests) where
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import Control.Applicative
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import Data.List (intersperse)
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import Data.Maybe (fromMaybe, maybeToList, isNothing, fromJust)
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import Test.Framework
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import Test.Framework.Providers.QuickCheck2 (testProperty)
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import Test.QuickCheck
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import Text.Megaparsec.Char
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import Text.Megaparsec.Combinator
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import Util
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tests :: Test
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tests = testGroup "Generic parser combinators"
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[ testProperty "combinator between" prop_between
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, testProperty "combinator choice" prop_choice
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, testProperty "combinator count" prop_count
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, testProperty "combinator count'" prop_count'
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, testProperty "combinator endBy" prop_endBy
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, testProperty "combinator endBy1" prop_endBy1
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, testProperty "combinator manyTill" prop_manyTill
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, testProperty "combinator someTill" prop_someTill
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, testProperty "combinator option" prop_option
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, testProperty "combinator sepBy" prop_sepBy
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, testProperty "combinator sepBy1" prop_sepBy1
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, testProperty "combinator sepEndBy" prop_sepEndBy
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, testProperty "combinator sepEndBy1" prop_sepEndBy1
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, testProperty "combinator skipMany" prop_skipMany
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, testProperty "combinator skipSome" prop_skipSome ]
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prop_between :: String -> Char -> NonNegative Int -> String -> Property
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prop_between pre c n' post = checkParser p r s
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where p = between (string pre) (string post) (many (char c))
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n = getNonNegative n'
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b = length $ takeWhile (== c) post
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r | b > 0 = posErr (length pre + n + b) s $ exStr post :
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if length post == b
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then [uneEof, exCh c]
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else [uneCh (post !! b), exCh c]
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| otherwise = Right z
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z = replicate n c
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s = pre ++ z ++ post
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prop_choice :: NonEmptyList Char -> Char -> Property
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prop_choice cs' s' = checkParser p r s
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where cs = getNonEmpty cs'
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p = choice $ char <$> cs
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r | s' `elem` cs = Right s'
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| otherwise = posErr 0 s $ uneCh s' : (exCh <$> cs)
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s = [s']
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prop_count :: Int -> NonNegative Int -> Property
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prop_count n x' = checkParser p r s
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where x = getNonNegative x'
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p = count n (char 'x')
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r = simpleParse (count' n n (char 'x')) s
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s = replicate x 'x'
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prop_count' :: Int -> Int -> NonNegative Int -> Property
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prop_count' m n x' = checkParser p r s
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where x = getNonNegative x'
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p = count' m n (char 'x')
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r | n <= 0 || m > n =
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if x == 0
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then Right ""
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else posErr 0 s [uneCh 'x', exEof]
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| m <= x && x <= n = Right s
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| x < m = posErr x s [uneEof, exCh 'x']
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| otherwise = posErr n s [uneCh 'x', exEof]
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s = replicate x 'x'
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prop_endBy :: NonNegative Int -> Char -> Property
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prop_endBy n' c = checkParser p r s
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where n = getNonNegative n'
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p = endBy (char 'a') (char '-')
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r | c == 'a' && n == 0 = posErr 1 s [uneEof, exCh '-']
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| c == 'a' = posErr (g n) s [uneCh 'a', exCh '-']
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| c == '-' && n == 0 = posErr 0 s [uneCh '-', exCh 'a', exEof]
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| c /= '-' = posErr (g n) s $ uneCh c :
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(if n > 0 then exCh '-' else exEof) :
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[exCh 'a' | n == 0]
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| otherwise = Right (replicate n 'a')
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s = intersperse '-' (replicate n 'a') ++ [c]
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prop_endBy1 :: NonNegative Int -> Char -> Property
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prop_endBy1 n' c = checkParser p r s
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where n = getNonNegative n'
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p = endBy1 (char 'a') (char '-')
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r | c == 'a' && n == 0 = posErr 1 s [uneEof, exCh '-']
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| c == 'a' = posErr (g n) s [uneCh 'a', exCh '-']
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| c == '-' && n == 0 = posErr 0 s [uneCh '-', exCh 'a']
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| c /= '-' = posErr (g n) s $ uneCh c :
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[exCh '-' | n > 0] ++
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[exCh 'a' | n == 0]
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| otherwise = Right (replicate n 'a')
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s = intersperse '-' (replicate n 'a') ++ [c]
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prop_manyTill :: NonNegative Int -> NonNegative Int
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-> NonNegative Int -> Property
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prop_manyTill a' b' c' = checkParser p r s
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where [a,b,c] = getNonNegative <$> [a',b',c']
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p = (,) <$> manyTill letterChar (char 'c') <*> many letterChar
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r | c == 0 = posErr (a + b) s [uneEof, exCh 'c', exSpec "letter"]
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| otherwise = let (pre, post) = break (== 'c') s
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in Right (pre, drop 1 post)
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s = abcRow a b c
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prop_someTill :: NonNegative Int -> NonNegative Int
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-> NonNegative Int -> Property
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prop_someTill a' b' c' = checkParser p r s
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where [a,b,c] = getNonNegative <$> [a',b',c']
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p = (,) <$> someTill letterChar (char 'c') <*> many letterChar
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r | null s = posErr 0 s [uneEof, exSpec "letter"]
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| c == 0 = posErr (a + b) s [uneEof, exCh 'c', exSpec "letter"]
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| s == "c" = posErr 1 s [uneEof, exCh 'c', exSpec "letter"]
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| head s == 'c' = Right ("c", drop 2 s)
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| otherwise = let (pre, post) = break (== 'c') s
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in Right (pre, drop 1 post)
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s = abcRow a b c
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prop_option :: String -> String -> String -> Property
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prop_option d a s = checkParser p r s
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where p = option d (string a)
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r = simpleParse (fromMaybe d <$> optional (string a)) s
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prop_sepBy :: NonNegative Int -> Maybe Char -> Property
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prop_sepBy n' c' = checkParser p r s
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where n = getNonNegative n'
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c = fromJust c'
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p = sepBy (char 'a') (char '-')
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r | isNothing c' = Right (replicate n 'a')
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| c == 'a' && n == 0 = Right "a"
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| n == 0 = posErr 0 s [uneCh c, exCh 'a', exEof]
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| c == '-' = posErr (length s) s [uneEof, exCh 'a']
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| otherwise = posErr (g n) s [uneCh c, exCh '-', exEof]
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s = intersperse '-' (replicate n 'a') ++ maybeToList c'
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prop_sepBy1 :: NonNegative Int -> Maybe Char -> Property
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prop_sepBy1 n' c' = checkParser p r s
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where n = getNonNegative n'
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c = fromJust c'
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p = sepBy1 (char 'a') (char '-')
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r | isNothing c' && n >= 1 = Right (replicate n 'a')
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| isNothing c' = posErr 0 s [uneEof, exCh 'a']
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| c == 'a' && n == 0 = Right "a"
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| n == 0 = posErr 0 s [uneCh c, exCh 'a']
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| c == '-' = posErr (length s) s [uneEof, exCh 'a']
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| otherwise = posErr (g n) s [uneCh c, exCh '-', exEof]
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s = intersperse '-' (replicate n 'a') ++ maybeToList c'
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prop_sepEndBy :: NonNegative Int -> Maybe Char -> Property
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prop_sepEndBy n' c' = checkParser p r s
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where n = getNonNegative n'
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c = fromJust c'
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p = sepEndBy (char 'a') (char '-')
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a = Right $ replicate n 'a'
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r | isNothing c' = a
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| c == 'a' && n == 0 = Right "a"
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| n == 0 = posErr 0 s [uneCh c, exCh 'a', exEof]
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| c == '-' = a
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| otherwise = posErr (g n) s [uneCh c, exCh '-', exEof]
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s = intersperse '-' (replicate n 'a') ++ maybeToList c'
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prop_sepEndBy1 :: NonNegative Int -> Maybe Char -> Property
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prop_sepEndBy1 n' c' = checkParser p r s
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where n = getNonNegative n'
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c = fromJust c'
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p = sepEndBy1 (char 'a') (char '-')
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a = Right $ replicate n 'a'
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r | isNothing c' && n >= 1 = a
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| isNothing c' = posErr 0 s [uneEof, exCh 'a']
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| c == 'a' && n == 0 = Right "a"
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| n == 0 = posErr 0 s [uneCh c, exCh 'a']
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| c == '-' = a
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| otherwise = posErr (g n) s [uneCh c, exCh '-', exEof]
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s = intersperse '-' (replicate n 'a') ++ maybeToList c'
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prop_skipMany :: Char -> NonNegative Int -> String -> Property
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prop_skipMany c n' a = checkParser p r s
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where p = skipMany (char c) *> string a
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n = getNonNegative n'
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r = simpleParse (many (char c) >> string a) s
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s = replicate n c ++ a
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prop_skipSome :: Char -> NonNegative Int -> String -> Property
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prop_skipSome c n' a = checkParser p r s
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where p = skipSome (char c) *> string a
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n = getNonNegative n'
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r = simpleParse (some (char c) >> string a) s
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s = replicate n c ++ a
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g :: Int -> Int
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g x = x + if x > 0 then x - 1 else 0
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