composite-cassava (empty) → 0.0.1.0

raw patch · 5 files changed

+111/−0 lines, 5 filesdep +basedep +cassavadep +composite-base

Dependencies added: base, cassava, composite-base, text, unordered-containers

Files

• ChangeLog.md +5/−0
• LICENSE +30/−0
• README.md +3/−0
• composite-cassava.cabal +39/−0
• src/Composite/Csv.hs +34/−0

@@ -0,0 +1,5 @@+# Changelog for composite-cassava++## v0.0.1.0++Add `FromNamedRecord` and `ToNamedRecord` instances for `Rec f xs`.

@@ -0,0 +1,30 @@+Copyright Daniel Firth (c) 2021++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 Daniel Firth 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 @@+# composite-cassava++Provides `FromNamedRecord` and `ToNamedRecord` instances for composite records.

@@ -0,0 +1,39 @@+cabal-version: 1.12++-- This file has been generated from package.yaml by hpack version 0.34.4.+--+-- see: https://github.com/sol/hpack++name:           composite-cassava+version:        0.0.1.0+synopsis:       Csv parsing functionality for composite.+description:    Csv parsing functionality for composite.+category:       Composite, Csv+author:         Daniel Firth+maintainer:     dan.firth@homtopic.tech+copyright:      Daniel Firth+license:        MIT+license-file:   LICENSE+build-type:     Simple+extra-source-files:+    README.md+    ChangeLog.md++source-repository head+  type: git+  location: https://gitlab.homotopic.tech/haskell/composite-cassava++library+  exposed-modules:+      Composite.Csv+  other-modules:+      Paths_composite_cassava+  hs-source-dirs:+      src+  build-depends:+      base >=4.7 && <5+    , cassava >=0.5.0.0 && <0.6+    , composite-base >=0.7.0.0 && <0.8+    , text+    , unordered-containers+  default-language: Haskell2010

@@ -0,0 +1,34 @@+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE FlexibleInstances #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE TypeApplications #-}+{-# LANGUAGE TypeOperators #-}++module Composite.Csv where++import Composite.Record+import Data.Csv+import Data.HashMap.Strict as HM+import Data.Text.Encoding as T+import GHC.TypeLits++instance FromNamedRecord (Rec f '[]) where+  parseNamedRecord m = pure RNil++instance ToNamedRecord (Rec f '[]) where+  toNamedRecord m = mempty++instance (Functor f, KnownSymbol s, FromField (f x), FromNamedRecord (Rec f xs)) => FromNamedRecord (Rec f ((s :-> x) ': xs)) where+  parseNamedRecord m = do+    let nL :: (s :-> x)+        nL = undefined+    x <- m .: T.encodeUtf8 (valName nL)+    f <- parseNamedRecord @(Rec f xs) m+    pure $ x :^: f++instance (Functor f, KnownSymbol s, ToField (f x), ToNamedRecord (Rec f xs)) => ToNamedRecord (Rec f ((s :-> x) ': xs)) where+  toNamedRecord (x :^: xs) =+    let nL :: (s :-> x)+        nL = undefined+     in HM.singleton (T.encodeUtf8 (valName nL)) (toField x)