IntFormats (empty) → 0.1.0.0
raw patch · 8 files changed
+655/−0 lines, 8 filesdep +IntFormatsdep +QuickCheckdep +basesetup-changed
Dependencies added: IntFormats, QuickCheck, base, hspec, parsec
Files
- ChangeLog.md +4/−0
- IntFormats.cabal +35/−0
- LICENSE +373/−0
- README.md +9/−0
- Setup.hs +2/−0
- src/Text/IntFormats.hs +131/−0
- test/Spec.hs +1/−0
- test/Text/IntFormatsSpec.hs +100/−0
+ ChangeLog.md view
@@ -0,0 +1,4 @@+# Revision history for IntFormats++* 0.1.0.0 released 2019-10-11+ * Initial version
+ IntFormats.cabal view
@@ -0,0 +1,35 @@+name: IntFormats+version: 0.1.0.0+synopsis: Convert integers in various bases to and from strings+description: Parse or show positive and negative intergers in decimal, hexadecimal, octal, and binary.+ When parsing numbers, the base is determined automatically.+homepage: https://github.com/LyraSolomon/IntFormats+license: MPL-2.0+license-file: LICENSE+author: Lyra Solomon <mailtoLyra@gmail.com>+maintainer: Lyra Solomon <mailtoLyra@gmail.com>+copyright: Lyra Solomon 2019+bug-reports: https://github.com/LyraSolomon/IntFormats/issues+category: Text+build-type: Simple+cabal-version: >=1.10++source-repository head+ type: git+ location: https://github.com/LyraSolomon/IntFormats.git++library+ exposed-modules: Text.IntFormats+ hs-source-dirs: src+ build-depends: base ==4.9.*, parsec ==3.1.*, QuickCheck ==2.13.*+ default-language: Haskell2010+ ghc-options: -Wall+ other-extensions: FlexibleContexts++test-suite tests+ type: exitcode-stdio-1.0+ main-is: Spec.hs+ hs-source-dirs: test+ build-depends: base ==4.9.*, hspec ==2.7.*, QuickCheck ==2.13.*, IntFormats+ default-language: Haskell2010+ ghc-options: -Wall
+ LICENSE view
@@ -0,0 +1,373 @@+Mozilla Public License Version 2.0+==================================++1. Definitions+--------------++1.1. "Contributor"+ means each individual or legal entity that creates, contributes to+ the creation of, or owns Covered Software.++1.2. "Contributor Version"+ means the combination of the Contributions of others (if any) used+ by a Contributor and that particular Contributor's Contribution.++1.3. "Contribution"+ means Covered Software of a particular Contributor.++1.4. "Covered Software"+ means Source Code Form to which the initial Contributor has attached+ the notice in Exhibit A, the Executable Form of such Source Code+ Form, and Modifications of such Source Code Form, in each case+ including portions thereof.++1.5. "Incompatible With Secondary Licenses"+ means++ (a) that the initial Contributor has attached the notice described+ in Exhibit B to the Covered Software; or++ (b) that the Covered Software was made available under the terms of+ version 1.1 or earlier of the License, but not also under the+ terms of a Secondary License.++1.6. "Executable Form"+ means any form of the work other than Source Code Form.++1.7. "Larger Work"+ means a work that combines Covered Software with other material, in+ a separate file or files, that is not Covered Software.++1.8. "License"+ means this document.++1.9. "Licensable"+ means having the right to grant, to the maximum extent possible,+ whether at the time of the initial grant or subsequently, any and+ all of the rights conveyed by this License.++1.10. "Modifications"+ means any of the following:++ (a) any file in Source Code Form that results from an addition to,+ deletion from, or modification of the contents of Covered+ Software; or++ (b) any new file in Source Code Form that contains any Covered+ Software.++1.11. "Patent Claims" of a Contributor+ means any patent claim(s), including without limitation, method,+ process, and apparatus claims, in any patent Licensable by such+ Contributor that would be infringed, but for the grant of the+ License, by the making, using, selling, offering for sale, having+ made, import, or transfer of either its Contributions or its+ Contributor Version.++1.12. "Secondary License"+ means either the GNU General Public License, Version 2.0, the GNU+ Lesser General Public License, Version 2.1, the GNU Affero General+ Public License, Version 3.0, or any later versions of those+ licenses.++1.13. "Source Code Form"+ means the form of the work preferred for making modifications.++1.14. "You" (or "Your")+ means an individual or a legal entity exercising rights under this+ License. For legal entities, "You" includes any entity that+ controls, is controlled by, or is under common control with You. For+ purposes of this definition, "control" means (a) the power, direct+ or indirect, to cause the direction or management of such entity,+ whether by contract or otherwise, or (b) ownership of more than+ fifty percent (50%) of the outstanding shares or beneficial+ ownership of such entity.++2. License Grants and Conditions+--------------------------------++2.1. Grants++Each Contributor hereby grants You a world-wide, royalty-free,+non-exclusive license:++(a) under intellectual property rights (other than patent or trademark)+ Licensable by such Contributor to use, reproduce, make available,+ modify, display, perform, distribute, and otherwise exploit its+ Contributions, either on an unmodified basis, with Modifications, or+ as part of a Larger Work; and++(b) under Patent Claims of such Contributor to make, use, sell, offer+ for sale, have made, import, and otherwise transfer either its+ Contributions or its Contributor Version.++2.2. Effective Date++The licenses granted in Section 2.1 with respect to any Contribution+become effective for each Contribution on the date the Contributor first+distributes such Contribution.++2.3. Limitations on Grant Scope++The licenses granted in this Section 2 are the only rights granted under+this License. No additional rights or licenses will be implied from the+distribution or licensing of Covered Software under this License.+Notwithstanding Section 2.1(b) above, no patent license is granted by a+Contributor:++(a) for any code that a Contributor has removed from Covered Software;+ or++(b) for infringements caused by: (i) Your and any other third party's+ modifications of Covered Software, or (ii) the combination of its+ Contributions with other software (except as part of its Contributor+ Version); or++(c) under Patent Claims infringed by Covered Software in the absence of+ its Contributions.++This License does not grant any rights in the trademarks, service marks,+or logos of any Contributor (except as may be necessary to comply with+the notice requirements in Section 3.4).++2.4. Subsequent Licenses++No Contributor makes additional grants as a result of Your choice to+distribute the Covered Software under a subsequent version of this+License (see Section 10.2) or under the terms of a Secondary License (if+permitted under the terms of Section 3.3).++2.5. Representation++Each Contributor represents that the Contributor believes its+Contributions are its original creation(s) or it has sufficient rights+to grant the rights to its Contributions conveyed by this License.++2.6. Fair Use++This License is not intended to limit any rights You have under+applicable copyright doctrines of fair use, fair dealing, or other+equivalents.++2.7. Conditions++Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted+in Section 2.1.++3. Responsibilities+-------------------++3.1. Distribution of Source Form++All distribution of Covered Software in Source Code Form, including any+Modifications that You create or to which You contribute, must be under+the terms of this License. You must inform recipients that the Source+Code Form of the Covered Software is governed by the terms of this+License, and how they can obtain a copy of this License. You may not+attempt to alter or restrict the recipients' rights in the Source Code+Form.++3.2. Distribution of Executable Form++If You distribute Covered Software in Executable Form then:++(a) such Covered Software must also be made available in Source Code+ Form, as described in Section 3.1, and You must inform recipients of+ the Executable Form how they can obtain a copy of such Source Code+ Form by reasonable means in a timely manner, at a charge no more+ than the cost of distribution to the recipient; and++(b) You may distribute such Executable Form under the terms of this+ License, or sublicense it under different terms, provided that the+ license for the Executable Form does not attempt to limit or alter+ the recipients' rights in the Source Code Form under this License.++3.3. Distribution of a Larger Work++You may create and distribute a Larger Work under terms of Your choice,+provided that You also comply with the requirements of this License for+the Covered Software. If the Larger Work is a combination of Covered+Software with a work governed by one or more Secondary Licenses, and the+Covered Software is not Incompatible With Secondary Licenses, this+License permits You to additionally distribute such Covered Software+under the terms of such Secondary License(s), so that the recipient of+the Larger Work may, at their option, further distribute the Covered+Software under the terms of either this License or such Secondary+License(s).++3.4. Notices++You may not remove or alter the substance of any license notices+(including copyright notices, patent notices, disclaimers of warranty,+or limitations of liability) contained within the Source Code Form of+the Covered Software, except that You may alter any license notices to+the extent required to remedy known factual inaccuracies.++3.5. Application of Additional Terms++You may choose to offer, and to charge a fee for, warranty, support,+indemnity or liability obligations to one or more recipients of Covered+Software. However, You may do so only on Your own behalf, and not on+behalf of any Contributor. You must make it absolutely clear that any+such warranty, support, indemnity, or liability obligation is offered by+You alone, and You hereby agree to indemnify every Contributor for any+liability incurred by such Contributor as a result of warranty, support,+indemnity or liability terms You offer. You may include additional+disclaimers of warranty and limitations of liability specific to any+jurisdiction.++4. Inability to Comply Due to Statute or Regulation+---------------------------------------------------++If it is impossible for You to comply with any of the terms of this+License with respect to some or all of the Covered Software due to+statute, judicial order, or regulation then You must: (a) comply with+the terms of this License to the maximum extent possible; and (b)+describe the limitations and the code they affect. Such description must+be placed in a text file included with all distributions of the Covered+Software under this License. Except to the extent prohibited by statute+or regulation, such description must be sufficiently detailed for a+recipient of ordinary skill to be able to understand it.++5. Termination+--------------++5.1. The rights granted under this License will terminate automatically+if You fail to comply with any of its terms. However, if You become+compliant, then the rights granted under this License from a particular+Contributor are reinstated (a) provisionally, unless and until such+Contributor explicitly and finally terminates Your grants, and (b) on an+ongoing basis, if such Contributor fails to notify You of the+non-compliance by some reasonable means prior to 60 days after You have+come back into compliance. Moreover, Your grants from a particular+Contributor are reinstated on an ongoing basis if such Contributor+notifies You of the non-compliance by some reasonable means, this is the+first time You have received notice of non-compliance with this License+from such Contributor, and You become compliant prior to 30 days after+Your receipt of the notice.++5.2. If You initiate litigation against any entity by asserting a patent+infringement claim (excluding declaratory judgment actions,+counter-claims, and cross-claims) alleging that a Contributor Version+directly or indirectly infringes any patent, then the rights granted to+You by any and all Contributors for the Covered Software under Section+2.1 of this License shall terminate.++5.3. In the event of termination under Sections 5.1 or 5.2 above, all+end user license agreements (excluding distributors and resellers) which+have been validly granted by You or Your distributors under this License+prior to termination shall survive termination.++************************************************************************+* *+* 6. Disclaimer of Warranty *+* ------------------------- *+* *+* Covered Software is provided under this License on an "as is" *+* basis, without warranty of any kind, either expressed, implied, or *+* statutory, including, without limitation, warranties that the *+* Covered Software is free of defects, merchantable, fit for a *+* particular purpose or non-infringing. The entire risk as to the *+* quality and performance of the Covered Software is with You. *+* Should any Covered Software prove defective in any respect, You *+* (not any Contributor) assume the cost of any necessary servicing, *+* repair, or correction. This disclaimer of warranty constitutes an *+* essential part of this License. No use of any Covered Software is *+* authorized under this License except under this disclaimer. *+* *+************************************************************************++************************************************************************+* *+* 7. Limitation of Liability *+* -------------------------- *+* *+* Under no circumstances and under no legal theory, whether tort *+* (including negligence), contract, or otherwise, shall any *+* Contributor, or anyone who distributes Covered Software as *+* permitted above, be liable to You for any direct, indirect, *+* special, incidental, or consequential damages of any character *+* including, without limitation, damages for lost profits, loss of *+* goodwill, work stoppage, computer failure or malfunction, or any *+* and all other commercial damages or losses, even if such party *+* shall have been informed of the possibility of such damages. This *+* limitation of liability shall not apply to liability for death or *+* personal injury resulting from such party's negligence to the *+* extent applicable law prohibits such limitation. Some *+* jurisdictions do not allow the exclusion or limitation of *+* incidental or consequential damages, so this exclusion and *+* limitation may not apply to You. *+* *+************************************************************************++8. Litigation+-------------++Any litigation relating to this License may be brought only in the+courts of a jurisdiction where the defendant maintains its principal+place of business and such litigation shall be governed by laws of that+jurisdiction, without reference to its conflict-of-law provisions.+Nothing in this Section shall prevent a party's ability to bring+cross-claims or counter-claims.++9. Miscellaneous+----------------++This License represents the complete agreement concerning the subject+matter hereof. If any provision of this License is held to be+unenforceable, such provision shall be reformed only to the extent+necessary to make it enforceable. Any law or regulation which provides+that the language of a contract shall be construed against the drafter+shall not be used to construe this License against a Contributor.++10. Versions of the License+---------------------------++10.1. New Versions++Mozilla Foundation is the license steward. Except as provided in Section+10.3, no one other than the license steward has the right to modify or+publish new versions of this License. Each version will be given a+distinguishing version number.++10.2. Effect of New Versions++You may distribute the Covered Software under the terms of the version+of the License under which You originally received the Covered Software,+or under the terms of any subsequent version published by the license+steward.++10.3. Modified Versions++If you create software not governed by this License, and you want to+create a new license for such software, you may create and use a+modified version of this License if you rename the license and remove+any references to the name of the license steward (except to note that+such modified license differs from this License).++10.4. Distributing Source Code Form that is Incompatible With Secondary+Licenses++If You choose to distribute Source Code Form that is Incompatible With+Secondary Licenses under the terms of this version of the License, the+notice described in Exhibit B of this License must be attached.++Exhibit A - Source Code Form License Notice+-------------------------------------------++ This Source Code Form is subject to the terms of the Mozilla Public+ License, v. 2.0. If a copy of the MPL was not distributed with this+ file, You can obtain one at http://mozilla.org/MPL/2.0/.++If it is not possible or desirable to put the notice in a particular+file, then You may include the notice in a location (such as a LICENSE+file in a relevant directory) where a recipient would be likely to look+for such a notice.++You may add additional accurate notices of copyright ownership.++Exhibit B - "Incompatible With Secondary Licenses" Notice+---------------------------------------------------------++ This Source Code Form is "Incompatible With Secondary Licenses", as+ defined by the Mozilla Public License, v. 2.0.
+ README.md view
@@ -0,0 +1,9 @@+# Text.IntFormats Haskell Library++This library includes functions for converting from a string to an integer,+with the base determined automatically, and from an integer to a string,+with the user specifying the base. Supports negative numbers.++## Bug? Possible improvements? Let me know!++Just open an issue or pull request
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ src/Text/IntFormats.hs view
@@ -0,0 +1,131 @@+{-# LANGUAGE FlexibleContexts #-}+-- |Includes functions for converting from a string to an integer, with the base determined automatically,+-- and from an integer to a string, with the user specifying the base. Supports negative numbers.+--+-- For examples, see the [test source](https://github.com/LyraSolomon/IntFormats/tree/master/test/Text/IntFormatsSpec.hs)+--+-- @'parseInt' . 'showInt' True _ == Right@ for all inputs, however the reverse is not necessarily true, even in the case of+-- valid input, since 'parseInt' accepts some rather creative capitalization that 'showInt' does not produce.+module Text.IntFormats (IntFormat(..), parseInt, intParser, showInt) where++import Text.Parsec hiding (digit)+import Text.Parsec.Char (alphaNum)+import Data.Char (toUpper)+import Data.List (foldl1')+import Test.QuickCheck (Arbitrary, arbitrary, oneof)++-- |'IntFormat' specifies which base is used for 'showInt'+data IntFormat =+ -- |@0d99@, etc. This will be more commonly used without the prefix.+ Decimal |+ -- |Hexadecimal with lowercase digits, such as @0xff@+ Hexadecimal |+ -- |@0o77@, etc. In some programs, octal is denoted with a leading zero, however that is not used here.+ Octal |+ -- |@0b11@, etc.+ Binary |+ -- |Hexadecimal with uppercase digits. This only affects the digits A-F, not the prefix. For example, @0xFF@+ HexUpper deriving (Show, Eq)++-- |The same as 'parseInt', except the parsec monad isn't evaluated. This is intended for use as part of+-- a larger parser. If you simply want to get a value, use 'parseInt'+intParser :: (Integral a, Stream s m Char) => ParsecT s u m a+intParser = do + negative <- option ' ' (char '-')+ value <- (char '0' >> parseBase) <|> parseDec+ notFollowedBy (alphaNum <|> char '.')+ if negative == '-' then return (-value) else return value++-- |Converts a string to an integer if able, otherwise returns an error message.+-- The number may begin with @0x@, @0d@, @0o@, or @0b@ to specify the numerical base. If no prefix is provided, base 10 is assumed.+-- The prefix is case insensitive. If the number is negative, the sign goes in front of the prefix. The number must+-- not have leading spaces. The number may have characters following it, as long as it is not immediately followed by+-- a digit, a letter, or a decimal point.+parseInt :: Integral a => String -> Either String a+parseInt = mapLeft show . parse intParser ""++parseBase :: (Integral a, Stream s m Char) => ParsecT s u m a+parseBase = (char 'x' >> parseHex) <|> (char 'o' >> parseOct) <|> (char 'b' >> parseBin) <|> (char 'd' >> parseDec) <|>+ (char 'X' >> parseHex) <|> (char 'O' >> parseOct) <|> (char 'B' >> parseBin) <|> (char 'D' >> parseDec) <|> parseDec <|> return 0++-- |Converts a integer to a string, with the chosen numerical base.+showInt :: Integral a+ => Bool -- ^ Whether to include the prefix @0x@, @0d@, @0o@, or @0b@. A value of True is generally recommended for bases other than decimal.+ -> IntFormat -- ^ Which numerical base to use, and if it is hexadecimal, whether the digits are uppercase or lowercase+ -> a -- ^ The number to be converted+ -> String -- ^ The output value.+showInt prefix base n = if n < 0 then '-' : showInt' base (-n) else showInt' base n+ where showInt' Decimal = (if prefix then ("0d"++) else id) . digits 10+ showInt' Hexadecimal = (if prefix then ("0x"++) else id) . digits 16+ showInt' HexUpper = (if prefix then ("0x"++) else id) . map toUpper . digits 16+ showInt' Octal = (if prefix then ("0o"++) else id) . digits 8+ showInt' Binary = (if prefix then ("0b"++) else id) . digits 2++undigits :: Integral a => a -> String -> a+undigits n = foldl1' (\a b -> a*n+b) . map undigit++digits :: Integral a => a -> a -> String+digits n x = if x `div` n == 0 then [digit x] else digits n (x `div` n) ++ [digit (x `mod` n)]++parseDec :: (Integral a, Stream s m Char) => ParsecT s u m a+parseDec = undigits 10 <$> many1 (oneOf "1234567890") <?> "one or more decimal digits"++parseHex :: (Integral a, Stream s m Char) => ParsecT s u m a+parseHex = undigits 16 <$> many1 (oneOf "1234567890abcdefABCDEF") <?> "one or more dexadecimal digits"++parseOct :: (Integral a, Stream s m Char) => ParsecT s u m a+parseOct = undigits 8 <$> many1 (oneOf "12345670") <?> "one or more octal digits"++parseBin :: (Integral a, Stream s m Char) => ParsecT s u m a+parseBin = undigits 2 <$> many1 (oneOf "01") <?> "one or more binary undigits"++undigit :: Integral a => Char -> a+undigit '0' = 0+undigit '1' = 1+undigit '2' = 2+undigit '3' = 3+undigit '4' = 4+undigit '5' = 5+undigit '6' = 6+undigit '7' = 7+undigit '8' = 8+undigit '9' = 9+undigit 'a' = 10+undigit 'b' = 11+undigit 'c' = 12+undigit 'd' = 13+undigit 'e' = 14+undigit 'f' = 15+undigit 'A' = 10+undigit 'B' = 11+undigit 'C' = 12+undigit 'D' = 13+undigit 'E' = 14+undigit 'F' = 15+undigit _ = undefined++digit :: Integral a => a -> Char+digit 0 = '0'+digit 1 = '1'+digit 2 = '2'+digit 3 = '3'+digit 4 = '4'+digit 5 = '5'+digit 6 = '6'+digit 7 = '7'+digit 8 = '8'+digit 9 = '9'+digit 10 = 'a'+digit 11 = 'b'+digit 12 = 'c'+digit 13 = 'd'+digit 14 = 'e'+digit 15 = 'f'+digit _ = undefined++instance Arbitrary IntFormat where+ arbitrary = oneof $ map return [Hexadecimal, HexUpper, Decimal, Octal, Binary]++mapLeft :: (a -> b) -> Either a c -> Either b c+mapLeft f (Left x) = Left $ f x+mapLeft _ (Right x) = Right x
+ test/Spec.hs view
@@ -0,0 +1,1 @@+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
+ test/Text/IntFormatsSpec.hs view
@@ -0,0 +1,100 @@+module Text.IntFormatsSpec (spec) where++import Data.Char (isAlpha, isDigit)+import Test.Hspec+import Text.Read (readEither)+import Test.QuickCheck++import Text.IntFormats++showInt' :: Bool -> IntFormat -> Int -> String+showInt' = showInt++parseInt' :: String -> Either String Int+parseInt' = parseInt++spec :: Spec+spec = do+ describe "showInt" $ do+ it "separates digits in base 16" $+ showInt' False Hexadecimal 0x98765430 `shouldBe` "98765430"+ it "prints digits >9 in lowercase" $+ showInt' True Hexadecimal 0xafbecd `shouldBe` "0xafbecd"+ it "prints digits >9 in uppercase" $+ showInt' True HexUpper 0xafbecd `shouldBe` "0xAFBECD"+ it "only uses uppercase when needed" $+ showInt' False HexUpper 0x400 `shouldBe` "400"+ it "separates digits in base 10" $+ showInt' False Decimal 1234567890 `shouldBe` "1234567890"+ it "has correct decimal prefix" $+ showInt' True Decimal 321 `shouldBe` "0d321"+ it "separates digits in base 8" $+ showInt' False Octal 0o72546310 `shouldBe` "72546310"+ it "has correct octal prefix" $+ showInt' True Octal 0o1234 `shouldBe` "0o1234"+ it "separates digits in base 2" $+ showInt' False Binary 1000 `shouldBe` "1111101000"+ it "has correct binary prefix" $+ showInt' True Binary 100 `shouldBe` "0b1100100"+ it "extends show" $ property $+ equivalentFuncs (showInt' False Decimal) show+ it "works with negative numbers" $ property $+ \(p, m, n) -> showInt' p m (-(abs n)) === (if n == 0 then "" else "-") ++ showInt' p m (abs n)+ it "shows zero" $+ showInt' False Decimal 0 `shouldBe` "0"+ describe "parseInt" $ do+ it "hexadecimal with lowercase prefix" $+ parseInt' "0xaBcDEf01" `shouldBe` Right 0xabcdef01+ it "hexadecimal with uppercase prefix" $+ parseInt' "0X29876FF3" `shouldBe` Right 0x29876ff3+ it "decimal with lowercase prefix" $+ parseInt' "0d9087654321" `shouldBe` Right 9087654321+ it "decimal with uppercase prefix" $+ parseInt' "0D12345" `shouldBe` Right 12345+ it "octal with lowercase prefix" $+ parseInt' "0o71062543" `shouldBe` Right 0o71062543+ it "octal with uppercase prefix" $+ parseInt' "0O11111" `shouldBe` Right 0o11111+ it "binary with lowercase prefix" $+ parseInt' "0b1110" `shouldBe` Right 14+ it "binary with uppercase prefix" $+ parseInt' "0B101010" `shouldBe` Right 42+ it "zero with prefix" $+ parseInt' "0b0" `shouldBe` Right 0+ it "inverts showInt" $ property $+ \(m, n) -> (parseInt' . showInt True m) (abs n) === Right (abs n)+ it "extends read" $ property $+ \s -> parseInt' s `equalRight` readEither s+ it "zero without prefix" $+ parseInt' "0" `shouldBe` Right 0+ it "doesn't require prefix for base 10" $ property $+ equivalentFuncs (parseInt' . show . abs) (Right . abs)+ it "fails on leading alphabetical characters" $ property $+ null . parseInt' . filter isAlpha+ it "fails on empty string" $+ parseInt' "" `shouldSatisfy` null+ it "fails on 8 or 9 in octal" $ property $+ \n -> '8' `elem` show (abs n) || '9' `elem` show (abs n) ==> (null . parseInt') ("0o" ++ show (abs n :: Int))+ it "accepts leading zeros" $ property $+ \(n, m) -> m `mod` 5 /= 0 ==> Right (abs n) === parseInt' (replicate (m `mod` 5) '0' ++ show (abs n))+ it "fails on 2 to 9 in binary" $ property $+ \n -> length (show (abs n)) /= length (filter (\x->x=='0'||x=='1') (show (abs n))) ==> (null . parseInt') ("0b" ++ show (abs n :: Int))+ it "fails on a to f in decimal" $ property $+ \n -> length (showInt' False Hexadecimal (abs n)) /= length (filter isDigit (showInt' False Hexadecimal (abs n))) ==>+ (null . parseInt') (showInt False Hexadecimal (abs n))+ it "fails on trailing '.'" $+ parseInt' "12." `shouldSatisfy` null+ it "stops at separator" $+ parseInt' "12 34" `shouldBe` Right 12+ it "fails on invalid prefix" $ property $+ \c -> isAlpha c && c `notElem` "xdobXDOB" ==> null (parseInt' (c:"100"))+ it "works with negative numbers" $ property $+ \n b -> equivalentFuncs (parseInt' . ('-':) . showInt' True b . abs) (Right . (0-) . abs) n++equivalentFuncs :: (Eq b, Show b) => (a -> b) -> (a -> b) -> a -> Property+equivalentFuncs = (.) (<*>) $ (<$>) (===)++equalRight :: (Eq a, Show a) => Either t a -> Either s a -> Bool+equalRight (Left _) _ = True+equalRight _ (Left _) = True+equalRight (Right a) (Right b) = a == b