safe-money (empty) → 0.1

raw patch · 8 files changed

+2391/−0 lines, 8 filesdep +aesondep +basedep +binarysetup-changed

Dependencies added: aeson, base, binary, bytestring, cereal, constraints, deepseq, hashable, store, tasty, tasty-hunit, tasty-quickcheck

Files

• LICENSE +30/−0
• README.md +3/−0
• Setup.hs +2/−0
• changelog.md +3/−0
• safe-money.cabal +84/−0
• src/Data/Money.hs +769/−0
• src/Data/Money/Internal.hs +1100/−0
• tests/Main.hs +400/−0

@@ -0,0 +1,30 @@+Copyright (c) 2016, Renzo Carbonara++All rights reserved.++Redistribution and use in source and binary forms, with or without+modification, are permitted provided that the following conditions are met:++    * Redistributions of source code must retain the above copyright+      notice, this list of conditions and the following disclaimer.++    * Redistributions in binary form must reproduce the above+      copyright notice, this list of conditions and the following+      disclaimer in the documentation and/or other materials provided+      with the distribution.++    * Neither the name of Renzo Carbonara nor the names of other+      contributors may be used to endorse or promote products derived+      from this software without specific prior written permission.++THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

@@ -0,0 +1,3 @@+The Haskell `safe-money` library offers type-safe and lossless encoding and+operations for monetary values in all world currencies, including fiat+currencies, precious metals and crypto-currencies.

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

@@ -0,0 +1,3 @@+# Version 0.1++* Initial release.

@@ -0,0 +1,84 @@+name: safe-money+version: 0.1+license: BSD3+license-file: LICENSE+copyright: Copyright (c) Renzo Carbonara 2016+author: Renzo Carbonara+maintainer: renλren!zone+stability: Experimental+tested-with: GHC==8.0.1+homepage: https://github.com/k0001/safe-money+bug-reports: https://github.com/k0001/safe-money/issues+category: Money+build-type: Simple+cabal-version: >=1.10+extra-source-files: README.md changelog.md+synopsis: Type-safe and lossless encoding and manipulation of money, world currencies and precious metals.+description: Type-safe and lossless encoding and manipulation of money, world currencies and precious metals.++source-repository head+  type: git+  location: https://github.com/k0001/safe-money++library+  default-language: Haskell2010+  hs-source-dirs: src+  ghc-options: -Wall -O2+  exposed-modules:+      Data.Money+      Data.Money.Internal+  build-depends:+      base (>=4.5 && <5.0)+    , constraints++  if flag(aeson)+    build-depends: aeson+  if flag(binary)+    build-depends: binary+  if flag(cereal)+    build-depends: cereal+  if flag(deepseq)+    build-depends: deepseq+  if flag(hashable)+    build-depends: hashable+  if flag(store)+    build-depends: store++test-suite tests+  default-language: Haskell2010+  type: exitcode-stdio-1.0+  hs-source-dirs: tests src+  main-is: Main.hs+  build-depends:+     aeson+   , base+   , binary+   , bytestring+   , cereal+   , constraints+   , deepseq+   , hashable+   , store+   , tasty+   , tasty-hunit+   , tasty-quickcheck++-- Provide instances for @aeson@+flag aeson+  default: True+-- Provide instances for @binary@+flag binary+  default: True+-- Provide instances for @cereal@+flag cereal+  default: True+-- Provide instances for @store@+flag store+  default: True+-- Provide instances for @hashable@+flag hashable+  default: True+-- Provide instances for @deepseq@+flag deepseq+  default: True+

@@ -0,0 +1,769 @@+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE UndecidableInstances #-}++-- | Import this module qualified:+--+-- @+-- import qualified Data.Money as Money+-- @+module Data.Money+ ( -- * Dense monetary values+   I.Dense+ , I.dense+   -- * Discrete monetary values+ , I.Discrete+ , I.Discrete'+ , I.fromDiscrete+ , I.round+ , I.ceiling+ , I.floor+ , I.truncate+   -- * Currency scales+ , I.Scale+ , I.GoodScale+ , I.scale+   -- * Currency exchange+ , I.ExchangeRate+ , I.exchangeRate+ , I.fromExchangeRate+ , I.flipExchangeRate+ , I.exchange+   -- * Serializable representations+ , I.DenseRep+ , I.denseRep+ , I.fromDenseRep+ , I.withDenseRep+ , I.DiscreteRep+ , I.discreteRep+ , I.fromDiscreteRep+ , I.withDiscreteRep+ , I.ExchangeRateRep+ , I.exchangeRateRep+ , I.fromExchangeRateRep+ , I.withExchangeRateRep+ ) where++import qualified Data.Money.Internal as I++--------------------------------------------------------------------------------+-- Currency scales++-- | United Arab Emirates dirham+type instance I.Scale "AED" "AED" = '(100, 1)+type instance I.Scale "AED" "dirham" = '(1, 1)+type instance I.Scale "AED" "fils" = '(100, 1)+-- | Afghan afghani+type instance I.Scale "AFN" "AFN" = '(100, 1)+type instance I.Scale "AFN" "afghani" = '(1, 1)+type instance I.Scale "AFN" "pul" = '(100, 1)+-- | Albanian lek+type instance I.Scale "ALL" "ALL" = '(100, 1)+type instance I.Scale "ALL" "lek" = '(1, 1)+type instance I.Scale "ALL" "qindarke" = '(100, 1)+-- | Armenian dram+type instance I.Scale "AMD" "AMD" = '(100, 1)+type instance I.Scale "AMD" "dram" = '(1, 1)+type instance I.Scale "AMD" "luma" = '(100, 1)+-- | Netherlands Antillean guilder+type instance I.Scale "ANG" "ANG" = '(100, 1)+type instance I.Scale "ANG" "guilder" = '(1, 1)+type instance I.Scale "ANG" "cent" = '(100, 1)+-- | Angolan kwanza+type instance I.Scale "AOA" "AOA" = '(100, 1)+type instance I.Scale "AOA" "kwanza" = '(1, 1)+type instance I.Scale "AOA" "centimo" = '(100, 1)+-- | Argentine peso+type instance I.Scale "ARS" "ARS" = '(100, 1)+type instance I.Scale "ARS" "peso" = '(1, 1)+type instance I.Scale "ARS" "centavo" = '(100, 1)+-- | Australian dollar+type instance I.Scale "AUD" "AUD" = '(100, 1)+type instance I.Scale "AUD" "dollar" = '(1, 1)+type instance I.Scale "AUD" "cent" = '(100, 1)+-- | Aruban florin+type instance I.Scale "AWG" "AWG" = '(100, 1)+type instance I.Scale "AWG" "florin" = '(1, 1)+type instance I.Scale "AWG" "cent" = '(100, 1)+-- | Azerbaijani manat+type instance I.Scale "AZN" "AZN" = '(100, 1)+type instance I.Scale "AZN" "manat" = '(1, 1)+type instance I.Scale "AZN" "qapik" = '(100, 1)+-- | Bosnia and Herzegovina convertible mark+type instance I.Scale "BAM" "BAM" = '(100, 1)+type instance I.Scale "BAM" "mark" = '(1, 1)+type instance I.Scale "BAM" "fening" = '(100, 1)+-- | Barbadian dollar+type instance I.Scale "BBD" "BBD" = '(100, 1)+type instance I.Scale "BBD" "dollar" = '(1, 1)+type instance I.Scale "BBD" "cent" = '(100, 1)+-- | Bangladeshi taka+type instance I.Scale "BDT" "BDT" = '(100, 1)+type instance I.Scale "BDT" "taka" = '(1, 1)+type instance I.Scale "BDT" "paisa" = '(100, 1)+-- | Bulgarian lev+type instance I.Scale "BGN" "BGN" = '(100, 1)+type instance I.Scale "BGN" "lev" = '(1, 1)+type instance I.Scale "BGN" "stotinka" = '(100, 1)+-- | Bahraini dinar+type instance I.Scale "BHD" "BHD" = '(1000, 1)+type instance I.Scale "BHD" "dinar" = '(1, 1)+type instance I.Scale "BHD" "fils" = '(1000, 1)+-- | Burundi franc+type instance I.Scale "BIF" "BIF" = '(100, 1)+type instance I.Scale "BIF" "franc" = '(1, 1)+type instance I.Scale "BIF" "centime" = '(100, 1)+-- | Bermudian dollar+type instance I.Scale "BMD" "BMD" = '(100, 1)+type instance I.Scale "BMD" "dollar" = '(1, 1)+type instance I.Scale "BMD" "cent" = '(100, 1)+-- | Brunei dollar+type instance I.Scale "BND" "BND" = '(100, 1)+type instance I.Scale "BND" "dollar" = '(1, 1)+type instance I.Scale "BND" "sen" = '(100, 1)+-- | Bolivian boliviano+type instance I.Scale "BOB" "BOB" = '(100, 1)+type instance I.Scale "BOB" "boliviano" = '(1, 1)+type instance I.Scale "BOB" "centavo" = '(100, 1)+-- | Bolivian Mvdol+type instance I.Scale "BOV" "BOV" = '(100, 1)+-- | Brazilian real+type instance I.Scale "BRL" "BRL" = '(100, 1)+type instance I.Scale "BRL" "real" = '(1, 1)+type instance I.Scale "BRL" "centavo" = '(100, 1)+-- | Bahamian dollar+type instance I.Scale "BSD" "BSD" = '(100, 1)+type instance I.Scale "BSD" "dollar" = '(1, 1)+type instance I.Scale "BSD" "cent" = '(1, 1)+-- | Bhutanese ngultrum+type instance I.Scale "BTN" "BTN" = '(100, 1)+type instance I.Scale "BTN" "ngultrum" = '(1, 1)+type instance I.Scale "BTN" "chetrum" = '(100, 1)+-- | Botswana pula+type instance I.Scale "BWP" "BWP" = '(100, 1)+type instance I.Scale "BWP" "pula" = '(1, 1)+type instance I.Scale "BWP" "thebe" = '(100, 1)+-- | Belarusian ruble+type instance I.Scale "BYN" "BYN" = '(100, 1)+-- | Belarusian ruble+type instance I.Scale "BYR" "BYR" = '(100, 1)+type instance I.Scale "BYR" "ruble" = '(1, 1)+type instance I.Scale "BYR" "kapyeyka" = '(100, 1)+-- | Belize dollar+type instance I.Scale "BZD" "BZD" = '(100, 1)+type instance I.Scale "BZD" "dollar" = '(1, 1)+type instance I.Scale "BZD" "cent" = '(100, 1)+-- | Canadian dollar+type instance I.Scale "CAD" "CAD" = '(100, 1)+type instance I.Scale "CAD" "dollar" = '(1, 1)+type instance I.Scale "CAD" "cent" = '(100, 1)+-- | Congolese franc+type instance I.Scale "CDF" "CDF" = '(100, 1)+type instance I.Scale "CDF" "franc" = '(1, 1)+type instance I.Scale "CDF" "centime" = '(100, 1)+-- | WIR euro+type instance I.Scale "CHE" "CHE" = '(100, 1)+-- | Swiss franc+type instance I.Scale "CHF" "CHF" = '(100, 1)+type instance I.Scale "CHF" "franc" = '(1, 1)+type instance I.Scale "CHF" "rappen" = '(100, 1)+-- | WIR franc+type instance I.Scale "CHW" "CHW" = '(100, 1)+-- | Chilean unidad de fomento+type instance I.Scale "CLF" "CLF" = '(100, 1)+-- | Chilean peso+type instance I.Scale "CLP" "CLP" = '(100, 1)+type instance I.Scale "CLP" "peso" = '(1, 1)+type instance I.Scale "CLP" "centavo" = '(100, 1)+-- | Chinese Renminbi+type instance I.Scale "CNY" "CNY" = '(100, 1)+type instance I.Scale "CNY" "yuan" = '(1, 1)+type instance I.Scale "CNY" "fen" = '(100, 1)+-- | Colombian peso+type instance I.Scale "COP" "COP" = '(100, 1)+type instance I.Scale "COP" "peso" = '(1, 1)+type instance I.Scale "COP" "centavo" = '(100, 1)+-- | Colombian unidad de valor real+type instance I.Scale "COU" "COU" = '(100, 1)+-- | Costa Rican colon+type instance I.Scale "CRC" "CRC" = '(100, 1)+type instance I.Scale "CRC" "colon" = '(1, 1)+type instance I.Scale "CRC" "centimo" = '(100, 1)+-- | Cuban peso convertible+type instance I.Scale "CUC" "CUC" = '(100, 1)+type instance I.Scale "CUC" "peso" = '(1, 1)+type instance I.Scale "CUC" "centavo" = '(100, 1)+-- | Cuban peso+type instance I.Scale "CUP" "CUP" = '(100, 1)+type instance I.Scale "CUP" "peso" = '(1, 1)+type instance I.Scale "CUP" "centavo" = '(100, 1)+-- | Cape Verdean escudo+type instance I.Scale "CVE" "CVE" = '(100, 1)+type instance I.Scale "CVE" "escudo" = '(1, 1)+type instance I.Scale "CVE" "centavo" = '(100, 1)+-- | Czech koruna+type instance I.Scale "CZK" "CZK" = '(100, 1)+type instance I.Scale "CZK" "koruna" = '(1, 1)+type instance I.Scale "CZK" "haler" = '(100, 1)+-- | Djiboutian franc+type instance I.Scale "DJF" "DJF" = '(100, 1)+type instance I.Scale "DJF" "franc" = '(1, 1)+type instance I.Scale "DJF" "centime" = '(100, 1)+-- | Danish krone+type instance I.Scale "DKK" "DKK" = '(100, 1)+type instance I.Scale "DKK" "krone" = '(1, 1)+type instance I.Scale "DKK" "ore" = '(100, 1)+-- | Dominican peso+type instance I.Scale "DOP" "DOP" = '(100, 1)+type instance I.Scale "DOP" "peso" = '(1, 1)+type instance I.Scale "DOP" "centavo" = '(100, 1)+-- | Algerian dinar+type instance I.Scale "DZD" "DZD" = '(100, 1)+type instance I.Scale "DZD" "dinar" = '(1, 1)+type instance I.Scale "DZD" "santeem" = '(100, 1)+-- | Egyptian pound+type instance I.Scale "EGP" "EGP" = '(100, 1)+type instance I.Scale "EGP" "pound" = '(1, 1)+type instance I.Scale "EGP" "piastre" = '(100, 1)+-- | Eritrean nakfa+type instance I.Scale "ERN" "ERN" = '(100, 1)+type instance I.Scale "ERN" "nafka" = '(1, 1)+type instance I.Scale "ERN" "cent" = '(100, 1)+-- | Ethiopian birr+type instance I.Scale "ETB" "ETB" = '(100, 1)+type instance I.Scale "ETB" "birr" = '(1, 1)+type instance I.Scale "ETB" "santim" = '(100, 1)+-- | European euro+type instance I.Scale "EUR" "EUR" = '(100, 1)+type instance I.Scale "EUR" "euro" = '(1, 1)+type instance I.Scale "EUR" "cent" = '(100, 1)+-- | Fijian dollar+type instance I.Scale "FJD" "FJD" = '(100, 1)+-- | Falkland Islands pound+type instance I.Scale "FKP" "FKP" = '(100, 1)+type instance I.Scale "FKP" "pound" = '(1, 1)+type instance I.Scale "FKP" "penny" = '(100, 1)+-- | Pound sterling+type instance I.Scale "GBP" "GBP" = '(100, 1)+type instance I.Scale "GBP" "pound" = '(1, 1)+type instance I.Scale "GBP" "penny" = '(100, 1)+-- | Georgian lari+type instance I.Scale "GEL" "GEL" = '(100, 1)+type instance I.Scale "GEL" "lari" = '(1, 1)+type instance I.Scale "GEL" "tetri" = '(100, 1)+-- | Ghanaian cedi+type instance I.Scale "GHS" "GHS" = '(100, 1)+type instance I.Scale "GHS" "cedi" = '(1, 1)+type instance I.Scale "GHS" "pesewa" = '(100, 1)+-- | Gibraltar pound+type instance I.Scale "GIP" "GIP" = '(100, 1)+type instance I.Scale "GIP" "pound" = '(1, 1)+type instance I.Scale "GIP" "penny" = '(100, 1)+-- | Gambian dalasi+type instance I.Scale "GMD" "GMD" = '(100, 1)+type instance I.Scale "GMD" "dalasi" = '(1, 1)+type instance I.Scale "GMD" "butut" = '(100, 1)+-- | Guinean franc+type instance I.Scale "GNF" "GNF" = '(100, 1)+type instance I.Scale "GNF" "franc" = '(1, 1)+type instance I.Scale "GNF" "centime" = '(100, 1)+-- | Guatemalan quetzal+type instance I.Scale "GTQ" "GTQ" = '(100, 1)+type instance I.Scale "GTQ" "quetzal" = '(1, 1)+type instance I.Scale "GTQ" "centavo" = '(100, 1)+-- | Guyanese dollar+type instance I.Scale "GYD" "GYD" = '(100, 1)+type instance I.Scale "GYD" "dollar" = '(1, 1)+type instance I.Scale "GYD" "cent" = '(100, 1)+-- | Hong Kong dollar+type instance I.Scale "HKD" "HKD" = '(100, 1)+type instance I.Scale "HKD" "dollar" = '(1, 1)+type instance I.Scale "HKD" "cent" = '(100, 1)+-- | Honduran lempira+type instance I.Scale "HNL" "HNL" = '(100, 1)+type instance I.Scale "HNL" "lempira" = '(1, 1)+type instance I.Scale "HNL" "centavo" = '(100, 1)+-- | Croatian kuna+type instance I.Scale "HRK" "HRK" = '(100, 1)+type instance I.Scale "HRK" "kuna" = '(1, 1)+type instance I.Scale "HRK" "lipa" = '(100, 1)+-- | Haitian gourde+type instance I.Scale "HTG" "HTG" = '(100, 1)+type instance I.Scale "HTG" "gourde" = '(1, 1)+type instance I.Scale "HTG" "centime" = '(1, 1)+-- | Hungarian forint+type instance I.Scale "HUF" "HUF" = '(100, 1)+type instance I.Scale "HUF" "forint" = '(1, 1)+type instance I.Scale "HUF" "filler" = '(100, 1)+-- | Indonesian rupiah+type instance I.Scale "IDR" "IDR" = '(100, 1)+type instance I.Scale "IDR" "rupiah" = '(1, 1)+type instance I.Scale "IDR" "sen" = '(100, 1)+-- | Israeli new shekel+type instance I.Scale "ILS" "ILS" = '(100, 1)+type instance I.Scale "ILS" "shekel" = '(1, 1)+type instance I.Scale "ILS" "agora" = '(100, 1)+-- | Indian rupee+type instance I.Scale "INR" "INR" = '(100, 1)+type instance I.Scale "INR" "rupee" = '(1, 1)+type instance I.Scale "INR" "paisa" = '(100, 1)+-- | Iraqi dinar+type instance I.Scale "IQD" "IQD" = '(1000, 1)+type instance I.Scale "IQD" "dinar" = '(1, 1)+type instance I.Scale "IQD" "fils" = '(1000, 1)+-- | Iranian rial+type instance I.Scale "IRR" "IRR" = '(100, 1)+type instance I.Scale "IRR" "rial" = '(1, 1)+type instance I.Scale "IRR" "dinar" = '(100, 1)+-- | Icelandic króna+type instance I.Scale "ISK" "ISK" = '(100, 1)+type instance I.Scale "ISK" "krona" = '(1, 1)+type instance I.Scale "ISK" "eyir" = '(100, 1)+-- | Jamaican dollar+type instance I.Scale "JMD" "JMD" = '(100, 1)+type instance I.Scale "JMD" "dollar" = '(1, 1)+type instance I.Scale "JMD" "cent" = '(100, 1)+-- | Jordanian dinar+type instance I.Scale "JOD" "JOD" = '(100, 1)+type instance I.Scale "JOD" "dinar" = '(1, 1)+type instance I.Scale "JOD" "piastre" = '(100, 1)+-- | Japanese yen+type instance I.Scale "JPY" "JPY" = '(100, 1)+type instance I.Scale "JPY" "yen" = '(1, 1)+type instance I.Scale "JPY" "sen" = '(100, 1)+-- | Kenyan shilling+type instance I.Scale "KES" "KES" = '(100, 1)+type instance I.Scale "KES" "shilling" = '(1, 1)+type instance I.Scale "KES" "cent" = '(100, 1)+-- | Kyrgyzstani som+type instance I.Scale "KGS" "KGS" = '(100, 1)+type instance I.Scale "KGS" "som" = '(1, 1)+type instance I.Scale "KGS" "tyiyn" = '(100, 1)+-- | Cambodian riel+type instance I.Scale "KHR" "KHR" = '(100, 1)+type instance I.Scale "KHR" "riel" = '(1, 1)+type instance I.Scale "KHR" "sen" = '(100, 1)+-- | Comorian franc+type instance I.Scale "KMF" "KMF" = '(100, 1)+type instance I.Scale "KMF" "franc" = '(1, 1)+type instance I.Scale "KMF" "centime" = '(100, 1)+-- | North Korean won+type instance I.Scale "KPW" "KPW" = '(100, 1)+type instance I.Scale "KPW" "won" = '(1, 1)+type instance I.Scale "KPW" "chon" = '(100, 1)+-- | South Korean won+type instance I.Scale "KRW" "KRW" = '(100, 1)+type instance I.Scale "KRW" "won" = '(1, 1)+type instance I.Scale "KRW" "jeon" = '(100, 1)+-- | Kuwaiti dinar+type instance I.Scale "KWD" "KWD" = '(1000, 1)+type instance I.Scale "KWD" "dinar" = '(1, 1)+type instance I.Scale "KWD" "fils" = '(1000, 1)+-- | Cayman Islands dollar+type instance I.Scale "KYD" "KYD" = '(100, 1)+type instance I.Scale "KYD" "dollar" = '(1, 1)+type instance I.Scale "KYD" "cent" = '(100, 1)+-- | Kazakhstani tenge+type instance I.Scale "KZT" "KZT" = '(100, 1)+type instance I.Scale "KZT" "tenge" = '(1, 1)+type instance I.Scale "KZT" "tiyin" = '(100, 1)+-- | Lao kip+type instance I.Scale "LAK" "LAK" = '(100, 1)+type instance I.Scale "LAK" "kip" = '(1, 1)+type instance I.Scale "LAK" "att" = '(100, 1)+-- | Lebanese pound+type instance I.Scale "LBP" "LBP" = '(100, 1)+type instance I.Scale "LBP" "pound" = '(1, 1)+type instance I.Scale "LBP" "piastre" = '(100, 1)+-- | Sri Lankan rupee+type instance I.Scale "LKR" "LKR" = '(100, 1)+type instance I.Scale "LKR" "rupee" = '(1, 1)+type instance I.Scale "LKR" "cent" = '(100, 1)+-- | Liberian dollar+type instance I.Scale "LRD" "LRD" = '(100, 1)+type instance I.Scale "LRD" "dollar" = '(1, 1)+type instance I.Scale "LRD" "cent" = '(100, 1)+-- | Lesotho loti+type instance I.Scale "LSL" "LSL" = '(100, 1)+type instance I.Scale "LSL" "loti" = '(1, 1)+type instance I.Scale "LSL" "sente" = '(100, 1)+-- | Libyan dinar+type instance I.Scale "LYD" "LYD" = '(100, 1)+type instance I.Scale "LYD" "dinar" = '(1, 1)+type instance I.Scale "LYD" "dirham" = '(1000, 1)+-- | Moroccan dirham+type instance I.Scale "MAD" "MAD" = '(100, 1)+type instance I.Scale "MAD" "dirham" = '(1, 1)+type instance I.Scale "MAD" "centime" = '(100, 1)+-- | Moldovan leu+type instance I.Scale "MDL" "MDL" = '(100, 1)+type instance I.Scale "MDL" "leu" = '(100, 1)+type instance I.Scale "MDL" "ban" = '(100, 1)+-- | Malagasy ariary+type instance I.Scale "MGA" "MGA" = '(5, 1)+type instance I.Scale "MGA" "ariary" = '(1, 1)+type instance I.Scale "MGA" "iraimbilanja" = '(5, 1)+-- | Macedonian denar+type instance I.Scale "MKD" "MKD" = '(100, 1)+type instance I.Scale "MKD" "denar" = '(1, 1)+type instance I.Scale "MKD" "deni" = '(100, 1)+-- | Myanmar kyat+type instance I.Scale "MMK" "MMK" = '(100, 1)+type instance I.Scale "MMK" "kyat" = '(1, 1)+type instance I.Scale "MMK" "pya" = '(100, 1)+-- | Mongolian tugrik+type instance I.Scale "MNT" "MNT" = '(100, 1)+type instance I.Scale "MNT" "tugrik" = '(1, 1)+type instance I.Scale "MNT" "mongo" = '(100, 1)+-- | Macanese pataca+type instance I.Scale "MOP" "MOP" = '(100, 1)+type instance I.Scale "MOP" "pataca" = '(1, 1)+type instance I.Scale "MOP" "avo" = '(100, 1)+-- | Mauritanian ouguiya+type instance I.Scale "MRO" "MRO" = '(5, 1)+type instance I.Scale "MRO" "ouguiya" = '(1, 1)+type instance I.Scale "MRO" "khoums" = '(5, 1)+-- | Mauritian rupee+type instance I.Scale "MUR" "MUR" = '(100, 1)+type instance I.Scale "MUR" "rupee" = '(1, 1)+type instance I.Scale "MUR" "cent" = '(100, 1)+-- | Maldivian rufiyaa+type instance I.Scale "MVR" "MVR" = '(100, 1)+type instance I.Scale "MVR" "rufiyaa" = '(1, 1)+type instance I.Scale "MVR" "laari" = '(100, 1)+-- | Malawian kwacha+type instance I.Scale "MWK" "MWK" = '(100, 1)+type instance I.Scale "MWK" "kwacha" = '(1, 1)+type instance I.Scale "MWK" "tambala" = '(100, 1)+-- | Mexican peso+type instance I.Scale "MXN" "MXN" = '(100, 1)+type instance I.Scale "MXN" "peso" = '(1, 1)+type instance I.Scale "MXN" "centavo" = '(100, 1)+-- | Mexican unidad de inversion+type instance I.Scale "MXV" "MXV" = '(100, 1)+-- | Malaysian ringgit+type instance I.Scale "MYR" "MYR" = '(100, 1)+type instance I.Scale "MYR" "ringgit" = '(1, 1)+type instance I.Scale "MYR" "sen" = '(100, 1)+-- | Mozambican metical+type instance I.Scale "MZN" "MZN" = '(100, 1)+type instance I.Scale "MZN" "metical" = '(1, 1)+type instance I.Scale "MZN" "centavo" = '(100, 1)+-- | Namibian dollar+type instance I.Scale "NAD" "NAD" = '(100, 1)+type instance I.Scale "NAD" "dollar" = '(1, 1)+type instance I.Scale "NAD" "cent" = '(100, 1)+-- | Nigerian naira+type instance I.Scale "NGN" "NGN" = '(100, 1)+type instance I.Scale "NGN" "naira" = '(1, 1)+type instance I.Scale "NGN" "kobo" = '(100, 1)+-- | Nicaraguan cordoba+type instance I.Scale "NIO" "NIO" = '(100, 1)+type instance I.Scale "NIO" "cordoba" = '(1, 1)+type instance I.Scale "NIO" "centavo" = '(100, 1)+-- | Norwegian krone+type instance I.Scale "NOK" "NOK" = '(100, 1)+type instance I.Scale "NOK" "krone" = '(1, 1)+type instance I.Scale "NOK" "ore" = '(100, 1)+-- | Nepalese rupee+type instance I.Scale "NPR" "NPR" = '(100, 1)+type instance I.Scale "NPR" "rupee" = '(1, 1)+type instance I.Scale "NPR" "paisa" = '(100, 1)+-- | New Zealand dollar+type instance I.Scale "NZD" "NZD" = '(100, 1)+type instance I.Scale "NZD" "dollar" = '(1, 1)+type instance I.Scale "NZD" "cent" = '(100, 1)+-- | Omani rial+type instance I.Scale "OMR" "OMR" = '(1000, 1)+type instance I.Scale "OMR" "rial" = '(1, 1)+type instance I.Scale "OMR" "baisa" = '(1000, 1)+-- | Panamenian balboa+type instance I.Scale "PAB" "PAB" = '(100, 1)+type instance I.Scale "PAB" "balboa" = '(1, 1)+type instance I.Scale "PAB" "centesimo" = '(100, 1)+-- | Peruvian sol+type instance I.Scale "PEN" "PEN" = '(100, 1)+type instance I.Scale "PEN" "sol" = '(1, 1)+type instance I.Scale "PEN" "centimo" = '(100, 1)+-- | Papua New Guinean kina+type instance I.Scale "PGK" "PGK" = '(100, 1)+type instance I.Scale "PGK" "kina" = '(1, 1)+type instance I.Scale "PGK" "toea" = '(100, 1)+-- | Philippine peso+type instance I.Scale "PHP" "PHP" = '(100, 1)+type instance I.Scale "PHP" "peso" = '(1, 1)+type instance I.Scale "PHP" "centavo" = '(100, 1)+-- | Pakistani rupee+type instance I.Scale "PKR" "PKR" = '(100, 1)+type instance I.Scale "PKR" "rupee" = '(1, 1)+type instance I.Scale "PKR" "paisa" = '(100, 1)+-- | Polish zloty+type instance I.Scale "PLN" "PLN" = '(100, 1)+type instance I.Scale "PLN" "zloty" = '(1, 1)+type instance I.Scale "PLN" "grosz" = '(100, 1)+-- | Paraguayan guarani+type instance I.Scale "PYG" "PYG" = '(100, 1)+type instance I.Scale "PYG" "guarani" = '(1, 1)+type instance I.Scale "PYG" "centimo" = '(100, 1)+-- | Qatari riyal+type instance I.Scale "QAR" "QAR" = '(100, 1)+type instance I.Scale "QAR" "riyal" = '(1, 1)+type instance I.Scale "QAR" "dirham" = '(100, 1)+-- | Romanian leu+type instance I.Scale "RON" "RON" = '(100, 1)+type instance I.Scale "RON" "leu" = '(1, 1)+type instance I.Scale "RON" "ban" = '(100, 1)+-- | Serbian dinar+type instance I.Scale "RSD" "RSD" = '(100, 1)+type instance I.Scale "RSD" "dinar" = '(1, 1)+type instance I.Scale "RSD" "para" = '(100, 1)+-- | Russian ruble+type instance I.Scale "RUB" "RUB" = '(100, 1)+type instance I.Scale "RUB" "ruble" = '(1, 1)+type instance I.Scale "RUB" "kopek" = '(100, 1)+-- | Rwandan franc+type instance I.Scale "RWF" "RWF" = '(100, 1)+type instance I.Scale "RWF" "franc" = '(1, 1)+type instance I.Scale "RWF" "centime" = '(100, 1)+-- | Saudi Arabian riyal+type instance I.Scale "SAR" "SAR" = '(100, 1)+type instance I.Scale "SAR" "riyal" = '(1, 1)+type instance I.Scale "SAR" "halala" = '(100, 1)+-- | Solomon Islands dollar+type instance I.Scale "SBD" "SBD" = '(100, 1)+type instance I.Scale "SBD" "dollar" = '(100, 1)+type instance I.Scale "SBD" "cent" = '(100, 1)+-- | Seychellois rupee+type instance I.Scale "SCR" "SCR" = '(100, 1)+type instance I.Scale "SCR" "rupee" = '(1, 1)+type instance I.Scale "SCR" "cent" = '(100, 1)+-- | Sudanese pound+type instance I.Scale "SDG" "SDG" = '(100, 1)+type instance I.Scale "SDG" "pound" = '(1, 1)+type instance I.Scale "SDG" "piastre" = '(100, 1)+-- | Swedish krona+type instance I.Scale "SEK" "SEK" = '(100, 1)+type instance I.Scale "SEK" "krona" = '(1, 1)+type instance I.Scale "SEK" "ore" = '(100, 1)+-- | Singapore dollar+type instance I.Scale "SGD" "SGD" = '(100, 1)+type instance I.Scale "SGD" "dollar" = '(1, 1)+type instance I.Scale "SGD" "cent" = '(100, 1)+-- | Saint Helena pound+type instance I.Scale "SHP" "SHP" = '(100, 1)+type instance I.Scale "SHP" "pound" = '(1, 1)+type instance I.Scale "SHP" "penny" = '(100, 1)+-- | Sierra Leonean leone+type instance I.Scale "SLL" "SLL" = '(100, 1)+type instance I.Scale "SLL" "leone" = '(1, 1)+type instance I.Scale "SLL" "cent" = '(100, 1)+-- | Somali shilling+type instance I.Scale "SOS" "SOS" = '(100, 1)+type instance I.Scale "SOS" "shilling" = '(1, 1)+type instance I.Scale "SOS" "cent" = '(100, 1)+-- | Surinamese dollar+type instance I.Scale "SRD" "SRD" = '(100, 1)+type instance I.Scale "SRD" "dollar" = '(1, 1)+type instance I.Scale "SRD" "cent" = '(100, 1)+-- | South Sudanese pound+type instance I.Scale "SSP" "SSP" = '(100, 1)+type instance I.Scale "SSP" "pound" = '(1, 1)+type instance I.Scale "SSP" "piastre" = '(100, 1)+-- | Sao Tome and Principe dobra+type instance I.Scale "STD" "STD" = '(100, 1)+type instance I.Scale "STD" "dobra" = '(1, 1)+type instance I.Scale "STD" "centimo" = '(100, 1)+-- | Salvadoran colon+type instance I.Scale "SVC" "SVC" = '(100, 1)+type instance I.Scale "SVC" "colon" = '(1, 1)+type instance I.Scale "SVC" "centavo" = '(100, 1)+-- | Syrian pound+type instance I.Scale "SYP" "SYP" = '(100, 1)+type instance I.Scale "SYP" "pound" = '(1, 1)+type instance I.Scale "SYP" "piastre" = '(100, 1)+-- | Swazi lilangeni+type instance I.Scale "SZL" "SZL" = '(100, 1)+type instance I.Scale "SZL" "lilangeni" = '(1, 1)+type instance I.Scale "SZL" "cent" = '(100, 1)+-- | Thai baht+type instance I.Scale "THB" "THB" = '(100, 1)+type instance I.Scale "THB" "baht" = '(1, 1)+type instance I.Scale "THB" "satang" = '(100, 1)+-- | Tajikistani somoni+type instance I.Scale "TJS" "TJS" = '(100, 1)+type instance I.Scale "TJS" "somoni" = '(1, 1)+type instance I.Scale "TJS" "diram" = '(100, 1)+-- | Turkmen manat+type instance I.Scale "TMT" "TMT" = '(100, 1)+type instance I.Scale "TMT" "manat" = '(1, 1)+type instance I.Scale "TMT" "tennesi" = '(100, 1)+-- | Tunisian dinar+type instance I.Scale "TND" "TND" = '(1000, 1)+type instance I.Scale "TND" "dinar" = '(1, 1)+type instance I.Scale "TND" "millime" = '(1000, 1)+-- | Tongan pa’anga+type instance I.Scale "TOP" "TOP" = '(100, 1)+type instance I.Scale "TOP" "pa'anga" = '(1, 1)+type instance I.Scale "TOP" "seniti" = '(100, 1)+-- | Turkish lira+type instance I.Scale "TRY" "TRY" = '(100, 1)+type instance I.Scale "TRY" "lira" = '(1, 1)+type instance I.Scale "TRY" "kurus" = '(100, 1)+-- | Tobago Trinidad and Tobago dollar+type instance I.Scale "TTD" "TTD" = '(100, 1)+type instance I.Scale "TTD" "dollar" = '(1, 1)+type instance I.Scale "TTD" "cent" = '(100, 1)+-- | New Taiwan dollar+type instance I.Scale "TWD" "TWD" = '(100, 1)+type instance I.Scale "TWD" "dollar" = '(1, 1)+type instance I.Scale "TWD" "cent" = '(100, 1)+-- | Tanzanian shilling+type instance I.Scale "TZS" "TZS" = '(100, 1)+type instance I.Scale "TZS" "shilling" = '(1, 1)+type instance I.Scale "TZS" "cent" = '(100, 1)+-- | Ukrainian hryvnia+type instance I.Scale "UAH" "UAH" = '(100, 1)+type instance I.Scale "UAH" "hryvnia" = '(1, 1)+type instance I.Scale "UAH" "kopiyka" = '(100, 1)+-- | Ugandan shilling+type instance I.Scale "UGX" "UGX" = '(100, 1)+type instance I.Scale "UGX" "shilling" = '(1, 1)+type instance I.Scale "UGX" "cent" = '(100, 1)+-- | United States dollar+type instance I.Scale "USD" "USD" = '(100, 1)+type instance I.Scale "USD" "dollar" = '(1, 1)+type instance I.Scale "USD" "cent" = '(100, 1)+-- | United States dollar (next day)+type instance I.Scale "USN" "USN" = '(100, 1)+-- | Uruguayan peso en unidades+type instance I.Scale "UYI" "UYI" = '(100, 1)+-- | Uruguayan peso+type instance I.Scale "UYU" "UYU" = '(100, 1)+type instance I.Scale "UYU" "peso" = '(1, 1)+type instance I.Scale "UYU" "centesimo" = '(100, 1)+-- | Uzbekistani som+type instance I.Scale "UZS" "UZS" = '(100, 1)+type instance I.Scale "UZS" "som" = '(1, 1)+type instance I.Scale "UZS" "tiyin" = '(100, 1)+-- | Venezuelan bolivar+type instance I.Scale "VEF" "VEF" = '(100, 1)+type instance I.Scale "VEF" "bolivar" = '(1, 1)+type instance I.Scale "VEF" "centimo" = '(100, 1)+-- | Vietnamese dong+type instance I.Scale "VND" "VND" = '(10, 1)+type instance I.Scale "VND" "dong" = '(1, 1)+type instance I.Scale "VND" "hao" = '(10, 1)+-- | Vanuatu vatu+type instance I.Scale "VUV" "VUV" = '(1, 1)+type instance I.Scale "VUV" "vatu" = '(1, 1)+-- | Samoan tālā+type instance I.Scale "WST" "WST" = '(100, 1)+type instance I.Scale "WST" "tala" = '(1, 1)+type instance I.Scale "WST" "sene" = '(100, 1)+-- | Central African CFA franc+type instance I.Scale "XAF" "XAF" = '(100, 1)+type instance I.Scale "XAF" "franc" = '(1, 1)+type instance I.Scale "XAF" "centime" = '(100, 1)+-- | East Caribbean dollar+type instance I.Scale "XCD" "XCD" = '(100, 1)+type instance I.Scale "XCD" "dollar" = '(1, 1)+type instance I.Scale "XCD" "cent" = '(100, 1)+-- | International Monetary Fund Special Drawing Right+type instance I.Scale "XDR" "XDR" = '(100, 1)+-- | West African CFA franc+type instance I.Scale "XOF" "XOF" = '(100, 1)+type instance I.Scale "XOF" "franc" = '(1, 1)+type instance I.Scale "XOF" "centime" = '(100, 1)+-- | CFP franc+type instance I.Scale "XPF" "XPF" = '(100, 1)+type instance I.Scale "XPF" "franc" = '(1, 1)+type instance I.Scale "XPF" "centime" = '(100, 1)+-- | Sucre+type instance I.Scale "XSU" "XSU" = '(100, 1)+-- | African Development Bank unit of account+type instance I.Scale "XUA" "XUA" = '(100, 1)+-- | Yemeni rial+type instance I.Scale "YER" "YER" = '(100, 1)+type instance I.Scale "YER" "rial" = '(1, 1)+type instance I.Scale "YER" "fils" = '(100, 1)+-- | South African rand+type instance I.Scale "ZAR" "ZAR" = '(100, 1)+type instance I.Scale "ZAR" "rand" = '(1, 1)+type instance I.Scale "ZAR" "cent" = '(100, 1)+-- | Zambian kwacha+type instance I.Scale "ZMW" "ZMW" = '(100, 1)+type instance I.Scale "ZMW" "kwacha" = '(1, 1)+type instance I.Scale "ZMW" "ngwee" = '(100, 1)+-- | Zimbawe dollar+type instance I.Scale "ZWL" "ZWL" = '(100, 1)+type instance I.Scale "ZWL" "dollar" = '(1, 1)+type instance I.Scale "ZWL" "cent" = '(100, 1)++-- | Gold+type instance I.Scale "XAU" "XAU" = I.ErrScaleNonCanonical "XAU"+type instance I.Scale "XAU" "troy-ounce" = '(1, 1)+type instance I.Scale "XAU" "grain" = '(480, 1)+type instance I.Scale "XAU" "milligrain" = '(480000, 1)+type instance I.Scale "XAU" "micrograin" = '(480000000, 1)+type instance I.Scale "XAU" "kilogram" = '(31103477, 1000000000)+type instance I.Scale "XAU" "gram" = '(31103477, 1000000)+type instance I.Scale "XAU" "milligram" = '(31103477, 1000)+type instance I.Scale "XAU" "microgram" = '(31103477, 1)++-- | Silver+type instance I.Scale "XAG" "XAG" = I.ErrScaleNonCanonical "XAG"+type instance I.Scale "XAG" "troy-ounce" = '(1, 1)+type instance I.Scale "XAG" "grain" = '(480, 1)+type instance I.Scale "XAG" "milligrain" = '(480000, 1)+type instance I.Scale "XAG" "micrograin" = '(480000000, 1)+type instance I.Scale "XAG" "kilogram" = '(31103477, 1000000000)+type instance I.Scale "XAG" "gram" = '(31103477, 1000000)+type instance I.Scale "XAG" "milligram" = '(31103477, 1000)+type instance I.Scale "XAG" "microgram" = '(31103477, 1)++-- | Palladium+type instance I.Scale "XPD" "XPD" = I.ErrScaleNonCanonical "XPD"+type instance I.Scale "XPD" "troy-ounce" = '(1, 1)+type instance I.Scale "XPD" "grain" = '(480, 1)+type instance I.Scale "XPD" "milligrain" = '(480000, 1)+type instance I.Scale "XPD" "micrograin" = '(480000000, 1)+type instance I.Scale "XPD" "kilogram" = '(31103477, 1000000000)+type instance I.Scale "XPD" "gram" = '(31103477, 1000000)+type instance I.Scale "XPD" "milligram" = '(31103477, 1000)+type instance I.Scale "XPD" "microgram" = '(31103477, 1)++-- | Platinum+type instance I.Scale "XPT" "XPT" = I.ErrScaleNonCanonical "XPT"+type instance I.Scale "XPT" "troy-ounce" = '(1, 1)+type instance I.Scale "XPT" "grain" = '(480, 1)+type instance I.Scale "XPT" "milligrain" = '(480000, 1)+type instance I.Scale "XPT" "micrograin" = '(480000000, 1)+type instance I.Scale "XPT" "kilogram" = '(31103477, 1000000000)+type instance I.Scale "XPT" "gram" = '(31103477, 1000000)+type instance I.Scale "XPT" "milligram" = '(31103477, 1000)+type instance I.Scale "XPT" "microgram" = '(31103477, 1)++-- | Bitcoin+type instance I.Scale "BTC" "BTC" = '(100000000, 1)+type instance I.Scale "BTC" "bitcoin" = '(1, 1)+type instance I.Scale "BTC" "satoshi" = '(100000000, 1)++-- | Bitcoin+type instance I.Scale "XBT" "XBT" = '(100000000, 1)+type instance I.Scale "XBT" "bitcoin" = '(1, 1)+type instance I.Scale "XBT" "satoshi" = '(100000000, 1)++-- | Ether+type instance I.Scale "ETH" "ETH" = '(1000000000000000000, 1)+type instance I.Scale "ETH" "ether" = '(1, 1)+type instance I.Scale "ETH" "kwei" = '(1000, 1)+type instance I.Scale "ETH" "babbage" = '(1000, 1)+type instance I.Scale "ETH" "mwei" = '(1000000, 1)+type instance I.Scale "ETH" "lovelace" = '(1000000, 1)+type instance I.Scale "ETH" "gwei" = '(1000000000, 1)+type instance I.Scale "ETH" "shannon" = '(1000000000, 1)+type instance I.Scale "ETH" "microether" = '(1000000000000, 1)+type instance I.Scale "ETH" "szabo" = '(1000000000000, 1)+type instance I.Scale "ETH" "finney" = '(1000000000000000, 1)+type instance I.Scale "ETH" "milliether" = '(1000000000000000, 1)+type instance I.Scale "ETH" "wei" = '(1000000000000000000, 1)

@@ -0,0 +1,1100 @@+{-# LANGUAGE BangPatterns #-}+{-# LANGUAGE CPP #-}+{-# LANGUAGE ConstraintKinds #-}+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE DeriveGeneric #-}+{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE KindSignatures #-}+{-# LANGUAGE LambdaCase #-}+{-# LANGUAGE PolyKinds #-}+{-# LANGUAGE RankNTypes #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE StandaloneDeriving #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TypeOperators #-}+{-# LANGUAGE UndecidableInstances #-}+{-# OPTIONS_GHC -Wno-redundant-constraints #-}++-- | This is an internal module. Import "Data.Money" instead.+module Data.Money.Internal+ ( -- * Dense monetary values+   Dense+ , dense+   -- * Discrete monetary values+ , Discrete+ , Discrete'+ , fromDiscrete+ , round+ , ceiling+ , floor+ , truncate+   -- * Currency scales+ , Scale+ , GoodScale+ , ErrScaleNonCanonical+ , scale+   -- * Currency exchange+ , ExchangeRate+ , exchangeRate+ , fromExchangeRate+ , flipExchangeRate+ , exchange+   -- * Serializable representations+ , DenseRep+ , denseRep+ , denseRepCurrency+ , denseRepAmount+ , denseRepAmountNumerator+ , denseRepAmountDenominator+ , mkDenseRep+ , fromDenseRep+ , withDenseRep+ , DiscreteRep+ , discreteRep+ , discreteRepCurrency+ , discreteRepScale+ , discreteRepScaleNumerator+ , discreteRepScaleDenominator+ , discreteRepAmount+ , mkDiscreteRep+ , fromDiscreteRep+ , withDiscreteRep+ , ExchangeRateRep+ , exchangeRateRep+ , exchangeRateRepSrcCurrency+ , exchangeRateRepDstCurrency+ , exchangeRateRepRate+ , exchangeRateRepRateNumerator+ , exchangeRateRepRateDenominator+ , mkExchangeRateRep+ , fromExchangeRateRep+ , withExchangeRateRep+ ) where++import Control.Applicative (empty)+import Control.Monad ((<=<))+import Data.Constraint (Dict(Dict))+import Data.Proxy (Proxy(..))+import Data.Ratio ((%), numerator, denominator)+import qualified GHC.Generics as GHC+import GHC.Real (infinity, notANumber)+import GHC.TypeLits+  (Symbol, SomeSymbol(..), Nat, SomeNat(..), CmpNat, KnownSymbol, KnownNat,+   natVal, someNatVal, symbolVal, someSymbolVal)+import qualified GHC.TypeLits as GHC+import Prelude hiding (round, ceiling, floor, truncate)+import qualified Prelude+import qualified Text.ParserCombinators.ReadPrec as ReadPrec+import qualified Text.ParserCombinators.ReadP as ReadP+import Text.Read (readPrec)+import Unsafe.Coerce (unsafeCoerce)++#ifdef VERSION_aeson+import qualified Data.Aeson as Ae+#endif++#ifdef VERSION_binary+import qualified Data.Binary as Binary+#endif++#ifdef VERSION_cereal+import qualified Data.Serialize as Cereal+#endif++#ifdef VERSION_deepseq+import Control.DeepSeq (NFData)+#endif++#ifdef VERSION_hashable+import Data.Hashable (Hashable)+#endif++#ifdef VERSION_store+import qualified Data.Store as Store+#endif++--------------------------------------------------------------------------------+-- | 'Dense' represents a dense monetary value for @currency@ (usually a+-- ISO-4217 currency code, but not necessarily) as a rational number.+--+-- While monetary values associated with a particular currency are discrete, you+-- can still treat monetary values as dense while operating on them. For+-- example, the half of @USD 3.41@ is @USD 1.705@, which is not an amount that+-- can't be represented as a number of USD cents (the smallest unit that can+-- represent USD amounts). Nevertheless, if you eventually multiply @USD 1.705@+-- by @4@, for example, you end up with @USD 6.82@, which is again a value+-- representable as USD cents. In other words, 'Dense' monetary values+-- allow us to perform precise calculations deferring the conversion to a+-- 'Discrete' monetary values as much as posible. Once you are ready to+-- aproximate a 'Dense' value to a 'Discrete' value you can use one of+-- 'round', 'floor', 'ceiling' or 'truncate'. Otherwise, using 'toRational' you+-- can obtain a precise 'Rational' representation.+--+-- Construct 'Dense' monetary values using 'dense', or+-- 'fromInteger' / 'fromIntegral' if that suffices.+--+-- /WARNING/ if you want to treat a dense monetary value as a /Real/ number (for+-- example, to take the square root of that monetary value), then you are on+-- your own. We can only guarantee lossless manipulation of rational values, so+-- you will need to convert back and forth betwen the 'Rational' representation+-- for 'Dense' and your (likely lossy) representation for /Real/ numbers.+newtype Dense (currency :: Symbol) = Dense Rational+  deriving (Eq, Ord, Num, Real, Fractional, GHC.Generic)++instance forall currency. KnownSymbol currency => Show (Dense currency) where+  show = \(Dense r0) ->+    let c = symbolVal (Proxy :: Proxy currency)+    in concat [ "Dense ", show c, " (", show r0, ")" ]++instance forall currency. KnownSymbol currency => Read (Dense currency) where+  readPrec = do+    let c = symbolVal (Proxy :: Proxy currency)+    _ <- ReadPrec.lift (ReadP.string ("Dense " ++ show c ++ " "))+    maybe empty pure =<< fmap dense readPrec++-- | Build a 'Dense' monetary value from a 'Rational' value.+--+-- For example, if you want to represent @USD 12.52316@, then you can use:+--+-- @+-- 'dense' (125316 % 10000)+-- @+--+-- This function returns 'Nothing' in case the given 'Rational' is 'infinity' or+-- 'notANumber'.+dense :: Rational -> Maybe (Dense currency)+dense = \r0 ->+  if (infinity == r0 || notANumber == r0)+  then Nothing else Just (Dense r0)+{-# INLINE dense #-}++-- | 'Discrete' represents a discrete monetary value for a @currency@ expresed+-- as an integer amount of a particular @unit@. For example, with @currency ~+-- \"USD\"@ and @unit ~ \"cent\"@ you can represent United States Dollars to+-- their full extent.+--+-- @currency@ is usually a ISO-4217 currency code, but not necessarily.+--+-- Construct 'Discrete' values using 'fromInteger'.+--+-- For example, if you want to represent @GBP 21.05@, where the smallest+-- represetable unit for a GBP (United Kingdom Pound) is the /penny/, and 100+-- /pennies/ equal 1 GBP (i.e., @'Scale' \"GBP\" ~ '(100, 1)@), then you can+-- use:+--+-- @+-- 'fromInteger' 2105 :: Discrete \"GBP\" \"penny\"+-- @+--+-- Because @2015 / 100 == 20.15@.+type Discrete (currency :: Symbol) (unit :: Symbol)+  = Discrete' currency (Scale currency unit)++-- | 'Discrete'' represents a discrete monetary value for a @currency@ expresed+-- as an amount of @scale@, which is a rational number expressed as @(numerator,+-- denominator)@.+--+-- You'll be using 'Discrete' instead of 'Discrete'' most of the time, which+-- mentions the unit name (such as /cent/ or /centavo/) instead of explicitely+-- mentioning the unit scale.+newtype Discrete' (currency :: Symbol) (scale :: (Nat, Nat))+  = Discrete Integer+  deriving (Eq, Ord, Enum, Num, Real, Integral, GHC.Generic)++instance forall currency scale.+  ( KnownSymbol currency, GoodScale scale+  ) => Show (Discrete' currency scale) where+  show = \d0@(Discrete i0) ->+    let c = symbolVal (Proxy :: Proxy currency)+    in concat [ "Discrete ", show c, " (", show (scale d0), ") ", show i0 ]++instance forall currency scale.+  ( KnownSymbol currency, GoodScale scale+  ) => Read (Discrete' currency scale) where+  readPrec = do+    let c = symbolVal (Proxy :: Proxy currency)+        s = scale (Proxy :: Proxy scale)+    _ <- ReadPrec.lift (ReadP.string+           ("Discrete " ++ show c ++ " (" ++ show s ++ ") ") )+    Discrete <$> readPrec++instance+  ( GHC.TypeError+      (('GHC.Text "The ") 'GHC.:<>:+       ('GHC.ShowType Discrete') 'GHC.:<>:+       ('GHC.Text " type is deliberately not a ") 'GHC.:<>:+       ('GHC.ShowType Fractional) 'GHC.:$$:+       ('GHC.Text "instance. Convert the ") 'GHC.:<>:+       ('GHC.ShowType Discrete') 'GHC.:<>:+       ('GHC.Text " value to a ") 'GHC.:<>:+       ('GHC.ShowType Dense) 'GHC.:$$:+       ('GHC.Text "value and use the ") 'GHC.:<>:+       ('GHC.ShowType Fractional) 'GHC.:<>:+       ('GHC.Text " features on it instead.")) )+  => Fractional (Discrete' currency scale) where+  fromRational = undefined+  recip = undefined++-- | Convert currency 'Discrete' monetary value into a 'Dense' monetary+-- value.+fromDiscrete+  :: GoodScale scale+  => Discrete' currency scale+  -> Dense currency -- ^+fromDiscrete = \c@(Discrete i) -> Dense (fromInteger i / scale c)+{-# INLINE fromDiscrete #-}++-- | Internal. Used to implement 'round', 'ceiling', 'floor' and 'truncate'.+roundf+  :: GoodScale scale+  => (Rational -> Integer) -- ^ 'Prelude.round', 'Prelude.ceiling' or similar.+  -> Dense currency+  -> (Discrete' currency scale, Maybe (Dense currency))+roundf f = \c0 ->+  let !r0 = toRational c0 :: Rational+      !i2 = f (r0 * scale d2) :: Integer+      !r2 = fromInteger i2 / scale d2 :: Rational+      !ycrest | r0 == r2  = Nothing+              | otherwise = Just (Dense (r0 - r2))+      !d2 = Discrete i2+  in (d2, ycrest)+{-# INLINE roundf #-}++-- | Round a 'Dense' value @x@ to the nearest value fully representable in+-- its @currency@'s @unit@ 'Scale', which might be @x@ itself.+--+-- If @x@ is already fully representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'round' x == (x, 'Nothing')+-- @+--+-- Otherwise, if the nearest value to @x@ that is fully representable in its+-- @currency@'s @unit@ 'Scale' is greater than @x@, then the following holds:+--+-- @+-- 'round' == 'ceiling'+-- @+--+-- Otherwise, the nearest value to @x@ that is fully representable in its+-- @currency@'s @unit@ 'Scale' is smaller than @x@, and the following holds:+--+-- @+-- 'round' == 'floor'+-- @+--+-- Proof that 'round' doesn't lose money:+--+-- @+-- x == case 'round' x of+--        (y, 'Nothing') -> y+--        (y, 'Just' z)  -> y + z+-- @+round+  :: GoodScale scale+  => Dense currency+  -> (Discrete' currency scale, Maybe (Dense currency)) -- ^+round = roundf Prelude.round+{-# INLINE round #-}++-- | Round a 'Dense' value @x@ to the nearest value fully representable in+-- its @currency@'s @unit@ 'Scale' which is greater than @x@ or equal to @x@.+--+--+-- If @x@ is already fully representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'ceiling' x == (x, 'Nothing')+-- @+--+-- Otherwise, if @x@ is not representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'ceiling' x == (y, 'Just' z)+-- @+--+-- @+-- x /= y+-- @+--+-- @+-- z < 'zero'+-- @+--+-- Proof that 'ceiling' doesn't lose money:+--+-- @+-- x == case 'ceiling' x of+--        (y, 'Nothing') -> y+--        (y, 'Just' z)  -> y + z+-- @+ceiling+  :: GoodScale scale+  => Dense currency+  -> (Discrete' currency scale, Maybe (Dense currency)) -- ^+ceiling = roundf Prelude.ceiling+{-# INLINE ceiling #-}++-- | Round a 'Dense' value @x@ to the nearest value fully representable in+-- its @currency@'s @unit@ 'Scale' which is smaller than @x@ or equal to @x@.+--+--+-- If @x@ is already fully representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'floor' x == (x, 'Nothing')+-- @+--+-- Otherwise, if @x@ is not representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'floor' x == (y, 'Just' z)+-- @+--+-- @+-- x /= y+-- @+--+-- @+-- z > 'zero'+-- @+--+-- Proof that 'floor' doesn't lose money:+--+-- @+-- x == case 'floor' x of+--        (y, 'Nothing') -> y+--        (y, 'Just' z)  -> y + z+-- @+floor+  :: GoodScale scale+  => Dense currency+  -> (Discrete' currency scale, Maybe (Dense currency)) -- ^+floor = roundf Prelude.floor+{-# INLINE floor #-}++-- | Round a 'Dense' value @x@ to the nearest value between zero and+-- @x@ (inclusive) which is fully representable in its @currency@'s @unit@+-- 'Scale'.+--+-- If @x@ is already fully representable in its @currency@'s @unit@ 'Scale',+-- then the following holds:+--+-- @+-- 'truncate' x == (x, 'Nothing')+-- @+--+-- Otherwise, if @x@ is positive, then the following holds:+--+-- @+-- 'truncate' == 'floor'+-- @+--+-- Otherwise, if @x@ is negative, the following holds:+--+-- @+-- 'truncate' == 'ceiling'+-- @+--+-- Proof that 'truncate' doesn't lose money:+--+-- @+-- x == case 'truncate' x of+--        (y, 'Nothing') -> y+--        (y, 'Just' z)  -> y + z+-- @+truncate+  :: GoodScale scale+  => Dense currency+  -> (Discrete' currency scale, Maybe (Dense currency)) -- ^+truncate = roundf Prelude.truncate+{-# INLINE truncate #-}++--------------------------------------------------------------------------------++-- | @'Scale' currency unit@ is a rational number (expressed as @'(numerator,+-- denominator)@) indicating how many pieces of @unit@ fit in @currency@.+--+-- @currency@ is usually a ISO-4217 currency code, but not necessarily.+--+-- The 'Scale' will determine how to convert a 'Dense' value into a+-- 'Discrete' value and vice-versa.+--+-- For example, there are 100 USD cents in 1 USD, so the scale for this+-- relationship is:+--+-- @+-- type instance 'Scale' \"USD\" \"cent\" = '(100, 1)+-- @+--+-- As another example, there is 1 dollar in USD, so the scale for this+-- relationship is:+--+-- @+-- type instance 'Scale' \"USD\" \"dollar\" = '(1, 1)+-- @+--+-- When using 'Discrete' values to represent money, it will be impossible to+-- represent an amount of @currency@ smaller than @unit@. So, if you decide to+-- use @Scale \"USD\" \"dollar\"@ as your scale, you will not be able to+-- represent values such as USD 3.50 or USD 21.87, since they are not exact+-- multiples of a dollar.+--+-- If there exists a cannonical smallest @unit@ that can fully represent the+-- currency, then an instance @'Scale' currency currency@ exists.+--+-- @+-- type instance 'Scale' \"USD\" \"USD\" = Scale \"USD\" \"cent\"+-- @+--+-- For some monetary values, such as precious metals, the smallest representable+-- unit is not obvious, since you can continue to split the precious metal many+-- times before it stops being a precious metal. Still, for practical purposes+-- we can make a sane arbitrary choice of smallest unit. For example, the base+-- unit for XAU (Gold) is the /troy ounce/, which is too big to be considered+-- the smallest unit, but we can arbitrarily choose the /milligrain/ as our+-- smallest unit, which is about as heavy as a single grain of table salt and+-- should be sufficiently precise for all monetary practical purposes. A /troy+-- ounce/ equals 480000 /milligrains/.+--+-- @+-- type instance 'Scale' \"XAG\" \"milligrain\" = '(480000, 1)+-- @+--+-- You can use other units such as /milligrams/ for measuring XAU, for example.+-- However, since the amount of /milligrams/ in a /troy ounce/ (31103.477) is+-- not integral, we need to use rational number to express it.+--+-- @+-- type instance 'Scale' \"XAU\" \"milligram\" = '(31103477, 1000)+-- @+--+-- If you try to obtain the 'Scale of a @currency@ without an obvious smallest+-- representable @unit@, like XAU, you will get a compile error.+type family Scale (currency :: Symbol) (unit :: Symbol) :: (Nat, Nat)++-- | A friendly 'GHC.TypeError' to use for a @currency@ that doesn't have a+-- cannonical small unit.+type family ErrScaleNonCanonical (currency :: Symbol) :: k where+  ErrScaleNonCanonical c = GHC.TypeError+    ( 'GHC.Text c 'GHC.:<>:+      'GHC.Text " is not a currency with a canonical smallest unit," 'GHC.:$$:+      'GHC.Text "be explicit about the currency unit you want to use." )++-- | Constraints to a scale (like the one returned by @'Scale' currency unit@)+-- expected to always be satisfied. In particular, the scale is always+-- guaranteed to be a positive rational number ('infinity' and 'notANumber' are+-- forbidden by 'GoodScale').+type GoodScale (scale :: (Nat, Nat))+   = ( CmpNat 0 (Fst scale) ~ 'LT+     , CmpNat 0 (Snd scale) ~ 'LT+     , KnownNat (Fst scale)+     , KnownNat (Snd scale)+     )++-- | If the specified @num@ and @den@ satisfy the expectations of 'GoodScale' at+-- the type level, then construct a proof for 'GoodScale'.+mkGoodScale+  :: forall num den+  .  (KnownNat num, KnownNat den)+  => Maybe (Dict (GoodScale '(num, den)))+mkGoodScale =+  let n = natVal (Proxy :: Proxy num)+      d = natVal (Proxy :: Proxy den)+  in if (n > 0) && (d > 0)+     then Just (unsafeCoerce (Dict :: Dict ('LT ~ 'LT, 'LT ~ 'LT,+                                            KnownNat num, KnownNat den)))+     else Nothing+{-# INLINE mkGoodScale #-}++-- | Term-level representation for the @currency@'s @unit@ 'Scale'.+--+-- For example, the 'Scale' for @\"USD\"@ in @\"cent\"@s is @100/1@.+--+-- The returned 'Rational' is statically guaranteed to be a positive number, and+-- to be different from both 'notANumber' and 'infinity'.+scale :: forall proxy scale. GoodScale scale => proxy scale -> Rational -- ^+scale = \_ ->+   natVal (Proxy :: Proxy (Fst scale)) %+   natVal (Proxy :: Proxy (Snd scale))+{-# INLINE scale #-}++--------------------------------------------------------------------------------++-- | Exchange rate for converting monetary values of currency @src@ into+-- monetary values of currency @dst@ by multiplying for it.+--+-- For example, if in order to convert USD to GBP we have to multiply by 1.2345,+-- then we can represent this situaion using:+--+-- @+-- 'exchangeRate' (12345 % 10000) :: 'Maybe' ('ExchangeRate' \"USD\" \"GBP\")+-- @+newtype ExchangeRate (src :: Symbol) (dst :: Symbol) = ExchangeRate Rational+  deriving (Eq, Ord, GHC.Generic)++instance forall src dst.+  ( KnownSymbol src, KnownSymbol dst+  ) => Show (ExchangeRate src dst) where+  show = \(ExchangeRate r0) ->+    let s = symbolVal (Proxy :: Proxy src)+        d = symbolVal (Proxy :: Proxy dst)+    in concat [ "ExchangeRate ", show s, " ", show d, " (", show r0, ")" ]++instance forall src dst.+  ( KnownSymbol src, KnownSymbol dst+  ) => Read (ExchangeRate (src :: Symbol) (dst :: Symbol)) where+  readPrec = do+    let s = symbolVal (Proxy :: Proxy src)+        d = symbolVal (Proxy :: Proxy dst)+    _ <- ReadPrec.lift (ReadP.string+            ("ExchangeRate " ++ show s ++ " " ++ show d ++ " "))+    maybe empty pure =<< fmap exchangeRate readPrec++-- | Obtain a 'Rational' representation of the 'ExchangeRate'.+--+-- This 'Rational' is statically guaranteed to be greater than 0, different+-- from 'infinity' and different from 'notANumber'.+fromExchangeRate :: ExchangeRate src dst -> Rational+fromExchangeRate = \(ExchangeRate r0) -> r0+{-# INLINE fromExchangeRate #-}++-- | Safely construct an 'ExchangeRate' from a 'Rational' number.+--+-- For construction to succeed, this 'Rational' must be greater than 0,+-- different from 'infinity' and different from 'notANumber'.+exchangeRate :: Rational -> Maybe (ExchangeRate src dst)+exchangeRate = \r0 ->+  if (r0 <= 0 || infinity == r0 || notANumber == r0)+  then Nothing else Just (ExchangeRate r0)+{-# INLINE exchangeRate #-}++-- | Flip the direction of an 'ExchangeRate'.+--+-- Identity law:+--+-- @+-- 'flipExchangeRate' . 'flipExchangeRate'   ==  'id'+-- @+flipExchangeRate :: ExchangeRate a b -> ExchangeRate b a+flipExchangeRate = \(ExchangeRate x) -> ExchangeRate (1 / x)+{-# INLINE flipExchangeRate #-}++-- | Apply the 'ExchangeRate' to the given @'Dense' src@ monetary value.+--+-- Identity law:+--+-- @+-- 'exchange' ('flipExchangeRate' x) . 'exchange' x  ==  'id'+-- @+--+-- Use the /Identity law/ for reasoning about going back and forth between @src@+-- and @dst@ in order to manage any leftovers that might not be representable as+-- a 'Discrete' monetary value of @src@.+exchange :: ExchangeRate src dst -> Dense src -> Dense dst+exchange = \(ExchangeRate r) -> \(Dense s) -> Dense (r * s)+{-# INLINE exchange #-}++--------------------------------------------------------------------------------+-- DenseRep++-- | A monomorphic representation of 'Dense' that is easier to serialize and+-- deserialize than 'Dense' in case you don't know the type indexes involved.+data DenseRep = DenseRep+  { _denseRepCurrency          :: !String+  , _denseRepAmountNumerator   :: !Integer+  , _denseRepAmountDenominator :: !Integer  -- ^ Positive, non-zero.+  } deriving (Eq, Show, GHC.Generic)++-- | WARNING: This instance does not compare monetary amounts, it just helps you+-- sort 'DenseRep' values in case you need to put them in a 'Data.Set.Set' or+-- similar.+deriving instance Ord DenseRep++-- | Currency name.+denseRepCurrency :: DenseRep -> String+denseRepCurrency = _denseRepCurrency+{-# INLINE denseRepCurrency #-}++-- | Currency unit amount.+denseRepAmount :: DenseRep -> Rational+denseRepAmount = \dr ->+  denseRepAmountNumerator dr % denseRepAmountDenominator dr+{-# INLINE denseRepAmount #-}++-- | Currency unit amount numerator.+denseRepAmountNumerator :: DenseRep -> Integer+denseRepAmountNumerator = _denseRepAmountNumerator+{-# INLINE denseRepAmountNumerator #-}++-- | Currency unit amount denominator. Positive, non-zero.+denseRepAmountDenominator :: DenseRep -> Integer+denseRepAmountDenominator = _denseRepAmountDenominator+{-# INLINE denseRepAmountDenominator #-}++-- | Internal. Build a 'DenseRep' from raw values.+mkDenseRep+  :: String -- ^ Currency.+  -> Integer -- ^ Scale nominator.+  -> Integer -- ^ Scale denominator (positive, non zero)+  -> Maybe DenseRep+mkDenseRep = \c n d -> case d > 0 of+  False -> Nothing+  True -> Just (DenseRep c n d)+{-# INLINE mkDenseRep #-}++-- | Convert a 'Dense' to a 'DenseRep' for ease of serialization.+denseRep :: KnownSymbol currency => Dense currency -> DenseRep+denseRep = \(Dense r0 :: Dense currency) ->+  let c = symbolVal (Proxy :: Proxy currency)+  in DenseRep c (numerator r0) (denominator r0)+{-# INLINE denseRep #-}++-- | Attempt to convert a 'DenseRep' to a 'Dense', provided you know the target+-- @currency@.+fromDenseRep+  :: forall currency+  .  KnownSymbol currency+  => DenseRep+  -> Maybe (Dense currency)  -- ^+fromDenseRep = \dr ->+  case denseRepCurrency dr == symbolVal (Proxy :: Proxy currency) of+     False -> Nothing+     True -> Just (Dense (denseRepAmount dr))+{-# INLINE fromDenseRep #-}++-- | Convert a 'DenseRep' to a 'Dense' without knowing the target @currency@.+--+-- Notice that @currency@ here can't leave its intended scope unless you can+-- prove equality with some other type at the outer scope, but in that case you+-- would be better off using 'fromDenseRep' directly.+withDenseRep+  :: DenseRep+  -> (forall currency. KnownSymbol currency => Dense currency -> r)+  -> r  -- ^+withDenseRep dr = \f ->+   case someSymbolVal (denseRepCurrency dr) of+      SomeSymbol (Proxy :: Proxy currency) ->+         f (Dense (denseRepAmount dr) :: Dense currency)+{-# INLINE withDenseRep #-}++--------------------------------------------------------------------------------+-- DiscreteRep++-- | A monomorphic representation of 'Discrete' that is easier to serialize and+-- deserialize than 'Discrete' in case you don't know the type indexes involved.+data DiscreteRep = DiscreteRep+  { _discreteRepCurrency         :: !String   -- ^ Currency name.+  , _discreteRepScaleNumerator   :: !Integer  -- ^ Positive, non-zero.+  , _discreteRepScaleDenominator :: !Integer  -- ^ Positive, non-zero.+  , _discreteRepAmount           :: !Integer  -- ^ Amount of unit.+  } deriving (Eq, Show, GHC.Generic)++-- | WARNING: This instance does not compare monetary amounts, it just helps you+-- sort 'DiscreteRep' values in case you need to put them in a 'Data.Set.Set' or+-- similar.+deriving instance Ord DiscreteRep++-- | Currency name.+discreteRepCurrency :: DiscreteRep -> String+discreteRepCurrency = _discreteRepCurrency+{-# INLINE discreteRepCurrency #-}++-- | Positive, non-zero.+discreteRepScale :: DiscreteRep -> Rational+discreteRepScale = \dr ->+  discreteRepScaleNumerator dr % discreteRepScaleDenominator dr+{-# INLINE discreteRepScale #-}++-- | Positive, non-zero.+discreteRepScaleNumerator :: DiscreteRep -> Integer+discreteRepScaleNumerator = _discreteRepScaleNumerator+{-# INLINE discreteRepScaleNumerator #-}++-- | Positive, non-zero.+discreteRepScaleDenominator :: DiscreteRep -> Integer+discreteRepScaleDenominator = _discreteRepScaleDenominator+{-# INLINE discreteRepScaleDenominator #-}++-- | Amount of currency unit.+discreteRepAmount :: DiscreteRep -> Integer+discreteRepAmount = _discreteRepAmount+{-# INLINE discreteRepAmount #-}++-- | Internal. Build a 'DiscreteRep' from raw values.+mkDiscreteRep+  :: String   -- ^ Currency name.+  -> Integer  -- ^ Scale numerator. Positive, non-zero.+  -> Integer  -- ^ Scale denominator. Positive, non-zero.+  -> Integer  -- ^ Amount of unit.+  -> Maybe DiscreteRep+mkDiscreteRep = \c n d a -> case (n > 0) && (d > 0) of+  False -> Nothing+  True -> Just (DiscreteRep c n d a)+{-# INLINE mkDiscreteRep #-}++-- | Convert a 'Discrete' to a 'DiscreteRep' for ease of serialization.+discreteRep+  :: (KnownSymbol currency, GoodScale scale)+  => Discrete' currency scale+  -> DiscreteRep -- ^+discreteRep = \(Discrete i0 :: Discrete' currency scale) ->+  let c = symbolVal (Proxy :: Proxy currency)+      n = natVal (Proxy :: Proxy (Fst scale))+      d = natVal (Proxy :: Proxy (Snd scale))+  in DiscreteRep c n d i0+{-# INLINE discreteRep #-}++-- | Attempt to convert a 'DiscreteRep' to a 'Discrete', provided you know the+-- target @currency@ and @unit@.+fromDiscreteRep+  :: forall currency scale+  .  (KnownSymbol currency, GoodScale scale)+  => DiscreteRep+  -> Maybe (Discrete' currency scale)  -- ^+fromDiscreteRep = \dr ->+   if (discreteRepCurrency dr == symbolVal (Proxy :: Proxy currency)) &&+      (discreteRepScaleNumerator dr == natVal (Proxy :: Proxy (Fst scale))) &&+      (discreteRepScaleDenominator dr == natVal (Proxy :: Proxy (Snd scale)))+   then Just (Discrete (discreteRepAmount dr))+   else Nothing+{-# INLINE fromDiscreteRep #-}++-- | Convert a 'DiscreteRep' to a 'Discrete' without knowing the target+-- @currency@ and @unit@.+--+-- Notice that @currency@ and @unit@ here can't leave its intended scope unless+-- you can prove equality with some other type at the outer scope, but in that+-- case you would be better off using 'fromDiscreteRep' directly.+--+-- Notice that you may need to add an explicit type to the result of this+-- function in order to keep the compiler happy.+withDiscreteRep+  :: forall r+  .  DiscreteRep+  -> ( forall currency scale.+         ( KnownSymbol currency+         , GoodScale scale+         ) => Discrete' currency scale+           -> r )+  -> r  -- ^+withDiscreteRep dr = \f ->+  case someSymbolVal (discreteRepCurrency dr) of+    SomeSymbol (Proxy :: Proxy currency) ->+      case someNatVal (discreteRepScaleNumerator dr) of+        Nothing -> error "withDiscreteRep: impossible: numerator < 0"+        Just (SomeNat (Proxy :: Proxy num)) ->+          case someNatVal (discreteRepScaleDenominator dr) of+            Nothing -> error "withDiscreteRep: impossible: denominator < 0"+            Just (SomeNat (Proxy :: Proxy den)) ->+              case mkGoodScale of+                Nothing -> error "withDiscreteRep: impossible: mkGoodScale"+                Just (Dict :: Dict (GoodScale '(num, den))) ->+                  f (Discrete (discreteRepAmount dr)+                       :: Discrete' currency '(num, den))+{-# INLINABLE withDiscreteRep #-}++--------------------------------------------------------------------------------+-- ExchangeRateRep++-- | A monomorphic representation of 'ExchangeRate' that is easier to serialize+-- and deserialize than 'ExchangeRate' in case you don't know the type indexes+-- involved.+data ExchangeRateRep = ExchangeRateRep+  { _exchangeRateRepSrcCurrency     :: !String+  , _exchangeRateRepDstCurrency     :: !String+  , _exchangeRateRepRateNumerator   :: !Integer  -- ^ Positive, non-zero.+  , _exchangeRateRepRateDenominator :: !Integer  -- ^ Positive, non-zero.+  } deriving (Eq, Show, GHC.Generic)++-- | WARNING: This instance does not compare monetary amounts, it just helps you+-- sort 'ExchangeRateRep' values in case you need to put them in a+-- 'Data.Set.Set' or similar.+deriving instance Ord ExchangeRateRep++-- | Source currency name.+exchangeRateRepSrcCurrency :: ExchangeRateRep -> String+exchangeRateRepSrcCurrency = _exchangeRateRepSrcCurrency+{-# INLINE exchangeRateRepSrcCurrency #-}++-- | Destination currency name.+exchangeRateRepDstCurrency :: ExchangeRateRep -> String+exchangeRateRepDstCurrency = _exchangeRateRepDstCurrency+{-# INLINE exchangeRateRepDstCurrency #-}++-- | Exchange rate. Positive, non-zero.+exchangeRateRepRate :: ExchangeRateRep -> Rational+exchangeRateRepRate = \x ->+  exchangeRateRepRateNumerator x % _exchangeRateRepRateDenominator x+{-# INLINE exchangeRateRepRate #-}++-- | Exchange rate numerator. Positive, non-zero.+exchangeRateRepRateNumerator :: ExchangeRateRep -> Integer+exchangeRateRepRateNumerator = _exchangeRateRepRateNumerator+{-# INLINE exchangeRateRepRateNumerator #-}++-- | Exchange rate denominator. Positive, non-zero.+exchangeRateRepRateDenominator :: ExchangeRateRep -> Integer+exchangeRateRepRateDenominator = _exchangeRateRepRateDenominator+{-# INLINE exchangeRateRepRateDenominator #-}++-- | Internal. Build a 'ExchangeRateRep' from raw values.+mkExchangeRateRep+  :: String   -- ^ Source currency name.+  -> String   -- ^ Destination currency name.+  -> Integer  -- ^ Exchange rate numerator. Positive, non-zero.+  -> Integer  -- ^ Exchange rate denominator. Positive, non-zero.+  -> Maybe ExchangeRateRep+mkExchangeRateRep = \src dst n d -> case (n > 0) && (d > 0) of+  False -> Nothing+  True -> Just (ExchangeRateRep src dst n d)+{-# INLINE mkExchangeRateRep #-}++-- | Convert a 'ExchangeRate' to a 'DiscreteRep' for ease of serialization.+exchangeRateRep+  :: (KnownSymbol src, KnownSymbol dst)+  => ExchangeRate src dst+  -> ExchangeRateRep -- ^+exchangeRateRep = \(ExchangeRate r0 :: ExchangeRate src dst) ->+  let src = symbolVal (Proxy :: Proxy src)+      dst = symbolVal (Proxy :: Proxy dst)+  in ExchangeRateRep src dst (numerator r0) (denominator r0)+{-# INLINE exchangeRateRep #-}++-- | Attempt to convert a 'ExchangeRateRep' to a 'ExchangeRate', provided you+-- know the target @src@ and @dst@ types.+fromExchangeRateRep+  :: forall src dst+  .  (KnownSymbol src, KnownSymbol dst)+  => ExchangeRateRep+  -> Maybe (ExchangeRate src dst)  -- ^+fromExchangeRateRep = \x ->+   if (exchangeRateRepSrcCurrency x == symbolVal (Proxy :: Proxy src)) &&+      (exchangeRateRepDstCurrency x == symbolVal (Proxy :: Proxy dst))+   then Just (ExchangeRate (exchangeRateRepRate x))+   else Nothing+{-# INLINE fromExchangeRateRep #-}++-- | Convert a 'ExchangeRateRep' to a 'ExchangeRate' without knowing the target+-- @currency@ and @unit@.+--+-- Notice that @src@ and @dst@ here can't leave its intended scope unless+-- you can prove equality with some other type at the outer scope, but in that+-- case you would be better off using 'fromExchangeRateRep' directly.+withExchangeRateRep+  :: ExchangeRateRep+  -> ( forall src dst.+         ( KnownSymbol src+         , KnownSymbol dst+         ) => ExchangeRate src dst+           -> r )+  -> r  -- ^+withExchangeRateRep x = \f ->+  case someSymbolVal (exchangeRateRepSrcCurrency x) of+    SomeSymbol (Proxy :: Proxy src) ->+      case someSymbolVal (exchangeRateRepDstCurrency x) of+        SomeSymbol (Proxy :: Proxy dst) ->+          f (ExchangeRate (exchangeRateRepRate x) :: ExchangeRate src dst)+{-# INLINABLE withExchangeRateRep #-}++--------------------------------------------------------------------------------+-- Miscellaneous++type family Fst (ab :: (ka, kb)) :: ka where Fst '(a,b) = a+type family Snd (ab :: (ka, kb)) :: ka where Snd '(a,b) = b++--------------------------------------------------------------------------------+-- Extra instances: hashable+#ifdef VERSION_hashable+instance Hashable (Dense currency)+instance Hashable DenseRep+instance Hashable (Discrete' currency scale)+instance Hashable DiscreteRep+instance Hashable (ExchangeRate src dst)+instance Hashable ExchangeRateRep+#endif++--------------------------------------------------------------------------------+-- Extra instances: deepseq+#ifdef VERSION_deepseq+instance NFData (Dense currency)+instance NFData DenseRep+instance NFData (Discrete' currency scale)+instance NFData DiscreteRep+instance NFData (ExchangeRate src dst)+instance NFData ExchangeRateRep+#endif++--------------------------------------------------------------------------------+-- Extra instances: cereal+#ifdef VERSION_cereal+-- | Compatible with 'DenseRep'.+instance (KnownSymbol currency) => Cereal.Serialize (Dense currency) where+  put = Cereal.put . denseRep+  get = maybe empty pure =<< fmap fromDenseRep Cereal.get+-- | Compatible with 'DiscreteRep'.+instance+  ( KnownSymbol currency, GoodScale scale+  ) => Cereal.Serialize (Discrete' currency scale) where+  put = Cereal.put . discreteRep+  get = maybe empty pure =<< fmap fromDiscreteRep Cereal.get+-- | Compatible with 'ExchangeRateRep'.+instance+  ( KnownSymbol src, KnownSymbol dst+  ) => Cereal.Serialize (ExchangeRate src dst) where+  put = Cereal.put . exchangeRateRep+  get = maybe empty pure =<< fmap fromExchangeRateRep Cereal.get+-- | Compatible with 'Dense'.+instance Cereal.Serialize DenseRep where+  put = \(DenseRep c n d) -> Cereal.put c >> Cereal.put n >> Cereal.put d+  get = maybe empty pure =<< mkDenseRep+    <$> Cereal.get <*> Cereal.get <*> Cereal.get+-- | Compatible with 'Discrete'.+instance Cereal.Serialize DiscreteRep where+  put = \(DiscreteRep c n d a) ->+    Cereal.put c >> Cereal.put n >> Cereal.put d >> Cereal.put a+  get = maybe empty pure =<< mkDiscreteRep+    <$> Cereal.get <*> Cereal.get <*> Cereal.get <*> Cereal.get+-- | Compatible with 'ExchangeRate'.+instance Cereal.Serialize ExchangeRateRep where+  put = \(ExchangeRateRep src dst n d) ->+    Cereal.put src >> Cereal.put dst >> Cereal.put n >> Cereal.put d+  get = maybe empty pure =<< mkExchangeRateRep+    <$> Cereal.get <*> Cereal.get <*> Cereal.get <*> Cereal.get+#endif++--------------------------------------------------------------------------------+-- Extra instances: binary+#ifdef VERSION_binary+-- | Compatible with 'DenseRep'.+instance (KnownSymbol currency) => Binary.Binary (Dense currency) where+  put = Binary.put . denseRep+  get = maybe empty pure =<< fmap fromDenseRep Binary.get+-- | Compatible with 'DiscreteRep'.+instance+  ( KnownSymbol currency, GoodScale scale+  ) => Binary.Binary (Discrete' currency scale) where+  put = Binary.put . discreteRep+  get = maybe empty pure =<< fmap fromDiscreteRep Binary.get+-- | Compatible with 'ExchangeRateRep'.+instance+  ( KnownSymbol src, KnownSymbol dst+  ) => Binary.Binary (ExchangeRate src dst) where+  put = Binary.put . exchangeRateRep+  get = maybe empty pure =<< fmap fromExchangeRateRep Binary.get+-- | Compatible with 'Dense'.+instance Binary.Binary DenseRep where+  put = \(DenseRep c n d) -> Binary.put c >> Binary.put n >> Binary.put d+  get = maybe empty pure =<< mkDenseRep+    <$> Binary.get <*> Binary.get <*> Binary.get+-- | Compatible with 'Discrete'.+instance Binary.Binary DiscreteRep where+  put = \(DiscreteRep c n d a) ->+    Binary.put c >> Binary.put n >> Binary.put d >> Binary.put a+  get = maybe empty pure =<< mkDiscreteRep+    <$> Binary.get <*> Binary.get <*> Binary.get <*> Binary.get+-- | Compatible with 'ExchangeRate'.+instance Binary.Binary ExchangeRateRep where+  put = \(ExchangeRateRep src dst n d) ->+    Binary.put src >> Binary.put dst >> Binary.put n >> Binary.put d+  get = maybe empty pure =<< mkExchangeRateRep+    <$> Binary.get <*> Binary.get <*> Binary.get <*> Binary.get+#endif++--------------------------------------------------------------------------------+-- Extra instances: aeson+#ifdef VERSION_aeson+-- | Compatible with 'DenseRep'+instance KnownSymbol currency => Ae.ToJSON (Dense currency) where+  toJSON = Ae.toJSON . denseRep+-- | Compatible with 'DenseRep'+instance KnownSymbol currency => Ae.FromJSON (Dense currency) where+  parseJSON = maybe empty pure <=< fmap fromDenseRep . Ae.parseJSON+-- | Compatible with 'Dense'+instance Ae.ToJSON DenseRep where+  toJSON = \(DenseRep c n d) -> Ae.toJSON ("Dense", c, n, d)+-- | Compatible with 'Dense'+instance Ae.FromJSON DenseRep where+  parseJSON = \v -> do+    ("Dense", c, n, d) <- Ae.parseJSON v+    maybe empty pure (mkDenseRep c n d)+-- | Compatible with 'DiscreteRep'+instance+  ( KnownSymbol currency, GoodScale scale+  ) => Ae.ToJSON (Discrete' currency scale) where+  toJSON = Ae.toJSON . discreteRep+-- | Compatible with 'DiscreteRep'+instance+  ( KnownSymbol currency, GoodScale scale+  ) => Ae.FromJSON (Discrete' currency scale) where+  parseJSON = maybe empty pure <=< fmap fromDiscreteRep . Ae.parseJSON+-- | Compatible with 'Discrete''+instance Ae.ToJSON DiscreteRep where+  toJSON = \(DiscreteRep c n d a) -> Ae.toJSON ("Discrete", c, n, d, a)+-- | Compatible with 'Discrete''+instance Ae.FromJSON DiscreteRep where+  parseJSON = \v -> do+    ("Discrete", c, n, d, a) <- Ae.parseJSON v+    maybe empty pure (mkDiscreteRep c n d a)+-- | Compatible with 'ExchangeRateRep'+instance+  ( KnownSymbol src, KnownSymbol dst+  ) => Ae.ToJSON (ExchangeRate src dst) where+  toJSON = Ae.toJSON . exchangeRateRep+-- | Compatible with 'ExchangeRateRep'+instance+  ( KnownSymbol src, KnownSymbol dst+  ) => Ae.FromJSON (ExchangeRate src dst) where+  parseJSON = maybe empty pure <=< fmap fromExchangeRateRep . Ae.parseJSON+-- | Compatible with 'ExchangeRate'+instance Ae.ToJSON ExchangeRateRep where+  toJSON = \(ExchangeRateRep src dst n d) ->+    Ae.toJSON ("ExchangeRate", src, dst, n, d)+-- | Compatible with 'ExchangeRate'+instance Ae.FromJSON ExchangeRateRep where+  parseJSON = \v -> do+    ("ExchangeRate", src, dst, n, d) <- Ae.parseJSON v+    maybe empty pure (mkExchangeRateRep src dst n d)+#endif++--------------------------------------------------------------------------------+-- Extra instances: store+#ifdef VERSION_store+-- | Compatible with 'DenseRep'.+instance (KnownSymbol currency) => Store.Store (Dense currency) where+  poke = Store.poke . denseRep+  peek = maybe (fail "peek") pure =<< fmap fromDenseRep Store.peek+-- | Compatible with 'Dense'.+instance Store.Store DenseRep where+  poke = \(DenseRep c n d) -> Store.poke (c, n, d)+  peek = do (c, n, d) <- Store.peek+            maybe (fail "peek") pure (mkDenseRep c n d)+-- | Compatible with 'DiscreteRep'.+instance+  ( KnownSymbol currency, GoodScale scale+  ) => Store.Store (Discrete' currency scale) where+  poke = Store.poke . discreteRep+  peek = maybe (fail "peek") pure =<< fmap fromDiscreteRep Store.peek+-- | Compatible with 'Discrete''.+instance Store.Store DiscreteRep where+  poke = \(DiscreteRep c n d a) -> Store.poke (c, n, d, a)+  peek = do (c, n, d, a) <- Store.peek+            maybe (fail "peek") pure (mkDiscreteRep c n d a)+-- | Compatible with 'ExchangeRateRep'.+instance+  ( KnownSymbol src, KnownSymbol dst+  ) => Store.Store (ExchangeRate src dst) where+  poke = Store.poke . exchangeRateRep+  peek = maybe (fail "peek") pure =<< fmap fromExchangeRateRep Store.peek+-- | Compatible with 'ExchangeRate'.+instance Store.Store ExchangeRateRep where+  poke = \(ExchangeRateRep src dst n d) -> Store.poke (src, dst, n, d)+  peek = do (src, dst, n, d) <- Store.peek+            maybe (fail "peek") pure (mkExchangeRateRep src dst n d)+#endif

@@ -0,0 +1,400 @@+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE PolyKinds #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE UndecidableInstances #-}+{-# LANGUAGE TypeFamilies #-}++module Main where++import qualified Test.Tasty as Tasty+import qualified Test.Tasty.Runners as Tasty+import Test.Tasty.QuickCheck ((===), (==>))+import qualified Test.Tasty.QuickCheck as QC++import qualified Data.Aeson as Ae+import qualified Data.Binary as Binary+import qualified Data.ByteString.Lazy as BSL+import Data.Maybe (catMaybes, isJust, isNothing)+import Data.Proxy (Proxy(Proxy))+import qualified Data.Serialize as Cereal+import qualified Data.Store as Store+import GHC.TypeLits (Nat, Symbol, KnownSymbol, symbolVal)++import qualified Data.Money as Money+import qualified Data.Money.Internal as Money++--------------------------------------------------------------------------------++instance QC.Arbitrary (Money.Discrete' currency scale) where+  arbitrary = fmap fromInteger QC.arbitrary+  shrink = fmap fromInteger . QC.shrink . toInteger++instance QC.Arbitrary Money.DiscreteRep where+  arbitrary = do+    let md = Money.mkDiscreteRep <$> QC.arbitrary <*> QC.arbitrary+                                 <*> QC.arbitrary <*> QC.arbitrary+    Just x <- QC.suchThat md isJust+    pure x+  shrink = \x -> Money.withDiscreteRep x (map Money.discreteRep . QC.shrink)++instance QC.Arbitrary (Money.Dense currency) where+  arbitrary = do+    Just x <- QC.suchThat (Money.dense <$> QC.arbitrary) isJust+    pure x+  shrink = catMaybes . fmap Money.dense . QC.shrink . toRational++instance QC.Arbitrary Money.DenseRep where+  arbitrary = do+    let md = Money.mkDenseRep <$> QC.arbitrary <*> QC.arbitrary <*> QC.arbitrary+    Just x <- QC.suchThat md isJust+    pure x+  shrink = \x -> Money.withDenseRep x (map Money.denseRep . QC.shrink)++instance QC.Arbitrary (Money.ExchangeRate src dst) where+  arbitrary = do+    Just x <- QC.suchThat (fmap Money.exchangeRate QC.arbitrary) isJust+    pure x+  shrink =+    catMaybes . fmap Money.exchangeRate . QC.shrink . Money.fromExchangeRate++instance QC.Arbitrary Money.ExchangeRateRep where+  arbitrary = do+    let md = Money.mkExchangeRateRep <$> QC.arbitrary <*> QC.arbitrary+                                     <*> QC.arbitrary <*> QC.arbitrary+    Just x <- QC.suchThat md isJust+    pure x+  shrink = \x ->+    Money.withExchangeRateRep x (map Money.exchangeRateRep . QC.shrink)++--------------------------------------------------------------------------------++main :: IO ()+main =  Tasty.defaultMainWithIngredients+  [ Tasty.consoleTestReporter+  , Tasty.listingTests+  ] tests++tests :: Tasty.TestTree+tests =+  Tasty.testGroup "root"+  [ testCurrencies+  , testCurrencyUnits+  , testExchange+  ]++testCurrencies :: Tasty.TestTree+testCurrencies =+  Tasty.testGroup "Currency"+  [ testDense (Proxy :: Proxy "BTC")  -- A cryptocurrency.+  , testDense (Proxy :: Proxy "USD")  -- A fiat currency with decimal fractions.+  , testDense (Proxy :: Proxy "VUV")  -- A fiat currency with non-decimal fractions.+  , testDense (Proxy :: Proxy "XAU")  -- A precious metal.+  ]++testCurrencyUnits :: Tasty.TestTree+testCurrencyUnits =+  Tasty.testGroup "Currency units"+  [ testDiscrete (Proxy :: Proxy "BTC") (Proxy :: Proxy "BTC")+  , testDiscrete (Proxy :: Proxy "BTC") (Proxy :: Proxy "satoshi")+  , testDiscrete (Proxy :: Proxy "BTC") (Proxy :: Proxy "bitcoin")+  , testDiscrete (Proxy :: Proxy "USD") (Proxy :: Proxy "USD")+  , testDiscrete (Proxy :: Proxy "USD") (Proxy :: Proxy "cent")+  , testDiscrete (Proxy :: Proxy "USD") (Proxy :: Proxy "dollar")+  , testDiscrete (Proxy :: Proxy "VUV") (Proxy :: Proxy "vatu")+  , testDiscrete (Proxy :: Proxy "XAU") (Proxy :: Proxy "micrograin")+  , testDiscrete (Proxy :: Proxy "XAU") (Proxy :: Proxy "milligrain")+  , testDiscrete (Proxy :: Proxy "XAU") (Proxy :: Proxy "grain")+  ]++testDense+  :: forall currency+  .  KnownSymbol currency+  => Proxy currency+  -> Tasty.TestTree+testDense pc =+  Tasty.testGroup ("Dense " ++ show (symbolVal pc))+  [ QC.testProperty "read . show == id" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         x === read (show x)+  , QC.testProperty "fromDenseRep . denseRep == Just" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Just x === Money.fromDenseRep (Money.denseRep x)+  , QC.testProperty "fromDenseRep works only for same currency" $+      QC.forAll QC.arbitrary $ \(dr :: Money.DenseRep) ->+        (Money.denseRepCurrency dr /= symbolVal pc)+           ==> isNothing (Money.fromDenseRep dr :: Maybe (Money.Dense currency))+  , QC.testProperty "withDenseRep" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+        let dr = Money.denseRep x+        in Money.withDenseRep dr $ \x' ->+             (show x, dr, Money.denseRep (x + 1))+                === (show x', Money.denseRep x', Money.denseRep (x' + 1))++  , QC.testProperty "Aeson encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Just x === Ae.decode (Ae.encode x)+  , QC.testProperty "Aeson encoding roundtrip (DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let x' = Money.denseRep x+         in Just x' === Ae.decode (Ae.encode x')+  , QC.testProperty "Aeson encoding roundtrip (Dense through DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Just x === Ae.decode (Ae.encode (Money.denseRep x))+  , QC.testProperty "Aeson encoding roundtrip (DenseRep through Dense)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Just (Money.denseRep x) === Ae.decode (Ae.encode x)++  , QC.testProperty "Binary encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)+         in x === y+  , QC.testProperty "Binary encoding roundtrip (DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let x' = Money.denseRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (Dense through DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let x' = Money.denseRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x) === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (DenseRep through Dense)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let x' = Money.denseRep x+             bs = Binary.encode x+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs++  , QC.testProperty "Cereal encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Right x === Cereal.decode (Cereal.encode x)+  , QC.testProperty "Cereal encoding roundtrip (DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         let x' = Money.denseRep x+         in Right x' === Cereal.decode (Cereal.encode x')+  , QC.testProperty "Cereal encoding roundtrip (Dense through DenseRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Right x === Cereal.decode (Cereal.encode (Money.denseRep x))+  , QC.testProperty "Cereal encoding roundtrip (DenseRep through Dense)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->+         Right (Money.denseRep x) === Cereal.decode (Cereal.encode x)+  ]++testExchange :: Tasty.TestTree+testExchange =+  Tasty.testGroup "Exchange"+  [ testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "BTC")+  , testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "USD")+  , testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "VUV")+  , testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "XAU")+  , testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "BTC")+  , testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "USD")+  , testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "VUV")+  , testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "XAU")+  , testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "BTC")+  , testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "USD")+  , testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "VUV")+  , testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "XAU")+  , testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "BTC")+  , testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "USD")+  , testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "VUV")+  , testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "XAU")+  ]++testDiscrete+  :: forall (currency :: Symbol) (unit :: Symbol)+  .  ( Money.GoodScale (Money.Scale currency unit)+     , KnownSymbol currency+     , KnownSymbol unit )+  => Proxy currency+  -> Proxy unit+  -> Tasty.TestTree+testDiscrete pc pu =+  Tasty.testGroup ("Discrete " ++ show (symbolVal pc) ++ " "+                               ++ show (symbolVal pu))+  [ testRounding pc pu+  , QC.testProperty "read . show == id" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         x === read (show x)+  , QC.testProperty "fromDiscreteRep . discreteRep == Just" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Just x === Money.fromDiscreteRep (Money.discreteRep x)+  , QC.testProperty "fromDiscreteRep works only for same currency and scale" $+      QC.forAll QC.arbitrary $ \(dr :: Money.DiscreteRep) ->+        ((Money.discreteRepCurrency dr /= symbolVal pc) &&+         (Money.discreteRepScale dr /=+             Money.scale (Proxy :: Proxy (Money.Scale currency unit)))+        ) ==> isNothing (Money.fromDiscreteRep dr+                          :: Maybe (Money.Discrete currency unit))+  , QC.testProperty "withDiscreteRep" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+        let dr = Money.discreteRep x+        in ( Money.withDiscreteRep dr $ \x' ->+                (show x, dr, Money.discreteRep (x + 1))+                   === (show x', Money.discreteRep x', Money.discreteRep (x' + 1))+           ) :: QC.Property++  , QC.testProperty "Aeson encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Just x === Ae.decode (Ae.encode x)+  , QC.testProperty "Aeson encoding roundtrip (DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let x' = Money.discreteRep x+         in Just x' === Ae.decode (Ae.encode x')+  , QC.testProperty "Aeson encoding roundtrip (Discrete through DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Just x === Ae.decode (Ae.encode (Money.discreteRep x))+  , QC.testProperty "Aeson encoding roundtrip (DiscreteRep through Discrete)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Just (Money.discreteRep x) === Ae.decode (Ae.encode x)++  , QC.testProperty "Binary encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)+         in x === y+  , QC.testProperty "Binary encoding roundtrip (DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let x' = Money.discreteRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (Discrete through DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let x' = Money.discreteRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x) === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (DiscreteRep through Discrete)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let x' = Money.discreteRep x+             bs = Binary.encode x+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs++  , QC.testProperty "Cereal encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Right x === Cereal.decode (Cereal.encode x)+  , QC.testProperty "Cereal encoding roundtrip (DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         let x' = Money.discreteRep x+         in Right x' === Cereal.decode (Cereal.encode x')+  , QC.testProperty "Cereal encoding roundtrip (Discrete through DiscreteRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Right x === Cereal.decode (Cereal.encode (Money.discreteRep x))+  , QC.testProperty "Cereal encoding roundtrip (DiscreteRep through Discrete)" $+      QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->+         Right (Money.discreteRep x) === Cereal.decode (Cereal.encode x)+  ]++testExchangeRate+  :: forall (src :: Symbol) (dst :: Symbol)+  .  (KnownSymbol src, KnownSymbol dst)+  => Proxy src+  -> Proxy dst+  -> Tasty.TestTree+testExchangeRate ps pd =+  Tasty.testGroup ("ExchangeRate " ++ show (symbolVal ps) ++ " "+                                   ++ show (symbolVal pd))+  [ QC.testProperty "read . show == id" $+      QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->+         xr === read (show xr)+  , QC.testProperty "flipExchangeRate . flipExchangeRate == id" $+      QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->+         let xr' = Money.flipExchangeRate xr+         in (Money.fromExchangeRate xr /= Money.fromExchangeRate xr')+               ==> (xr === Money.flipExchangeRate xr')+  , QC.testProperty "exchange (flipExchangeRate x) . exchange x == id" $+      QC.forAll QC.arbitrary $+         \( c0 :: Money.Dense src+          , xr :: Money.ExchangeRate src dst+          ) -> c0 === Money.exchange (Money.flipExchangeRate xr)+                                     (Money.exchange xr c0)+  , QC.testProperty "x == 1 ===> exchange x == id" $+      QC.forAll QC.arbitrary $+         \( c0 :: Money.Dense src+          ) -> let Just xr = Money.exchangeRate 1+               in toRational c0 === toRational (Money.exchange xr c0)+  , QC.testProperty "x /= 1 ===> exchange x /= id" $+      QC.forAll QC.arbitrary $+         \( c0 :: Money.Dense src+          , xr :: Money.ExchangeRate src dst+          ) -> (Money.fromExchangeRate xr /= 1)+                  ==> (toRational c0 /= toRational (Money.exchange xr c0))+  , QC.testProperty "fromExchangeRateRep . exchangeRateRep == Just" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Just x === Money.fromExchangeRateRep (Money.exchangeRateRep x)+  , QC.testProperty "fromExchangeRateRep works only for same currencies" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRateRep) ->+        ((Money.exchangeRateRepSrcCurrency x /= symbolVal ps) &&+         (Money.exchangeRateRepDstCurrency x /= symbolVal pd))+            ==> isNothing (Money.fromExchangeRateRep x+                            :: Maybe (Money.ExchangeRate src dst))+  , QC.testProperty "withExchangeRateRep" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+        let dr = Money.exchangeRateRep x+        in Money.withExchangeRateRep dr $ \x' ->+             (show x, dr) === (show x', Money.exchangeRateRep x')++  , QC.testProperty "Aeson encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Just x === Ae.decode (Ae.encode x)+  , QC.testProperty "Aeson encoding roundtrip (ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let x' = Money.exchangeRateRep x+         in Just x' === Ae.decode (Ae.encode x')+  , QC.testProperty "Aeson encoding roundtrip (ExchangeRate through ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Just x === Ae.decode (Ae.encode (Money.exchangeRateRep x))+  , QC.testProperty "Aeson encoding roundtrip (ExchangeRateRep through ExchangeRate)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Just (Money.exchangeRateRep x) === Ae.decode (Ae.encode x)++  , QC.testProperty "Binary encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)+         in x === y+  , QC.testProperty "Binary encoding roundtrip (ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let x' = Money.exchangeRateRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (ExchangeRate through ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let x' = Money.exchangeRateRep x+             bs = Binary.encode x'+         in Right (mempty, BSL.length bs, x) === Binary.decodeOrFail bs+  , QC.testProperty "Binary encoding roundtrip (ExchangeRateRep through ExchangeRate)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let x' = Money.exchangeRateRep x+             bs = Binary.encode x+         in Right (mempty, BSL.length bs, x') === Binary.decodeOrFail bs++  , QC.testProperty "Cereal encoding roundtrip" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Right x === Cereal.decode (Cereal.encode x)+  , QC.testProperty "Cereal encoding roundtrip (ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         let x' = Money.exchangeRateRep x+         in Right x' === Cereal.decode (Cereal.encode x')+  , QC.testProperty "Cereal encoding roundtrip (ExchangeRate through ExchangeRateRep)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Right x === Cereal.decode (Cereal.encode (Money.exchangeRateRep x))+  , QC.testProperty "Cereal encoding roundtrip (ExchangeRateRep through ExchangeRate)" $+      QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->+         Right (Money.exchangeRateRep x) === Cereal.decode (Cereal.encode x)+  ]++testRounding+  :: forall (currency :: Symbol) (unit :: Symbol)+  .  (Money.GoodScale (Money.Scale currency unit), KnownSymbol currency)+  => Proxy currency+  -> Proxy unit+  -> Tasty.TestTree+testRounding _ _ =+    Tasty.testGroup "Rounding"+    [ QC.testProperty "floor"    $ QC.forAll QC.arbitrary (g Money.floor)+    , QC.testProperty "ceiling"  $ QC.forAll QC.arbitrary (g Money.ceiling)+    , QC.testProperty "round"    $ QC.forAll QC.arbitrary (g Money.round)+    , QC.testProperty "truncate" $ QC.forAll QC.arbitrary (g Money.truncate)+    ]+  where+    g f = \(x :: Money.Dense currency) -> x === case f x of+      (y, Nothing) -> Money.fromDiscrete (y :: Money.Discrete currency unit)+      (y, Just z)  -> Money.fromDiscrete y + z