Use Decoding parsers as default

Move Data.Aeson.Parser(.Internal) into new package attoparsec-aeson

Update tests and benchmarks (mostly cleanup).
Very few error messages are now different, e.g. on unexpected
end-of-input.

.github/workflows/haskell-ci.yml

@@ -213,6 +213,7 @@ jobs:
           touch cabal.project
           echo "packages: $GITHUB_WORKSPACE/source/." >> cabal.project
           echo "packages: $GITHUB_WORKSPACE/source/attoparsec-iso8601" >> cabal.project
+          echo "packages: $GITHUB_WORKSPACE/source/attoparsec-aeson" >> cabal.project
           echo "packages: $GITHUB_WORKSPACE/source/text-iso8601" >> cabal.project
           echo "packages: $GITHUB_WORKSPACE/source/examples" >> cabal.project
           echo "packages: $GITHUB_WORKSPACE/source/benchmarks" >> cabal.project
@@ -231,6 +232,8 @@ jobs:
           echo "PKGDIR_aeson=${PKGDIR_aeson}" >> "$GITHUB_ENV"
           PKGDIR_attoparsec_iso8601="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/attoparsec-iso8601-[0-9.]*')"
           echo "PKGDIR_attoparsec_iso8601=${PKGDIR_attoparsec_iso8601}" >> "$GITHUB_ENV"
+          PKGDIR_attoparsec_aeson="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/attoparsec-aeson-[0-9.]*')"
+          echo "PKGDIR_attoparsec_aeson=${PKGDIR_attoparsec_aeson}" >> "$GITHUB_ENV"
           PKGDIR_text_iso8601="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/text-iso8601-[0-9.]*')"
           echo "PKGDIR_text_iso8601=${PKGDIR_text_iso8601}" >> "$GITHUB_ENV"
           PKGDIR_aeson_examples="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/aeson-examples-[0-9.]*')"
@@ -242,13 +245,16 @@ jobs:
           touch cabal.project.local
           echo "packages: ${PKGDIR_aeson}" >> cabal.project
           echo "packages: ${PKGDIR_attoparsec_iso8601}" >> cabal.project
+          echo "packages: ${PKGDIR_attoparsec_aeson}" >> cabal.project
           echo "packages: ${PKGDIR_text_iso8601}" >> cabal.project
           echo "packages: ${PKGDIR_aeson_examples}" >> cabal.project
           echo "packages: ${PKGDIR_aeson_benchmarks}" >> cabal.project
           echo "package aeson" >> cabal.project
           echo "    ghc-options: -Werror=missing-methods" >> cabal.project
           echo "package attoparsec-iso8601" >> cabal.project
           echo "    ghc-options: -Werror=missing-methods" >> cabal.project
+          echo "package attoparsec-aeson" >> cabal.project
+          echo "    ghc-options: -Werror=missing-methods" >> cabal.project
           echo "package text-iso8601" >> cabal.project
           echo "    ghc-options: -Werror=missing-methods" >> cabal.project
           echo "package aeson-examples" >> cabal.project
@@ -258,7 +264,7 @@ jobs:
           cat >> cabal.project <<EOF
           allow-newer: hermes-json:attoparsec-iso8601
           EOF
-          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(aeson|aeson-benchmarks|aeson-examples|attoparsec-iso8601|text-iso8601)$/; }' >> cabal.project.local
+          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(aeson|aeson-benchmarks|aeson-examples|attoparsec-aeson|attoparsec-iso8601|text-iso8601)$/; }' >> cabal.project.local
           cat cabal.project
           cat cabal.project.local
       - name: dump install plan
@@ -286,8 +292,9 @@ jobs:
           cabal-docspec $ARG_COMPILER
       - name: hlint
         run: |
-          if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_aeson} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src attoparsec-iso8601/src src-pure) ; fi
+          if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_aeson} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src) ; fi
           if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_attoparsec_iso8601} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src) ; fi
+          if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_attoparsec_aeson} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src) ; fi
           if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_text_iso8601} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src) ; fi
           if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_aeson_examples} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 src/) ; fi
           if [ $((HCNUMVER >= 90200 && HCNUMVER < 90400)) -ne 0 ] ; then (cd ${PKGDIR_aeson_benchmarks} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml -XHaskell2010 .) ; fi

.hlint.yaml

@@ -30,6 +30,7 @@
 - ignore:
     name: "Unused LANGUAGE pragma"
     within:
+      - Data.Aeson.Internal.ByteString
       - Data.Aeson.Internal.Text
       - Compare.JsonBench
 

Makefile

@@ -1,2 +1,2 @@
 lint:
-	./run-hlint.sh --cpp-include include/ src/ attoparsec-iso8601/ benchmarks/ examples/ src-pure/ tests/ text-iso8601/src text-iso8601/tests
+	./run-hlint.sh --cpp-include include/ src/ attoparsec-iso8601/ benchmarks/ examples/ tests/ text-iso8601/src text-iso8601/tests attoparsec-aeson/src

aeson.cabal

@@ -40,7 +40,6 @@ extra-source-files:
   benchmarks/json-data/*.json
   changelog.md
   README.markdown
-  src-pure/Data/Aeson/Parser/*.hs
   tests/golden/*.expected
   tests/JSONTestSuite/results/*.tok
   tests/JSONTestSuite/results/*.txt
@@ -54,7 +53,7 @@ flag ordered-keymap
 
 library
   default-language: Haskell2010
-  hs-source-dirs:   src attoparsec-iso8601/src
+  hs-source-dirs:   src
   exposed-modules:
     Data.Aeson
     Data.Aeson.Decoding
@@ -65,31 +64,28 @@ library
     Data.Aeson.Encoding.Internal
     Data.Aeson.Key
     Data.Aeson.KeyMap
-    Data.Aeson.Parser
-    Data.Aeson.Parser.Internal
     Data.Aeson.QQ.Simple
     Data.Aeson.Text
     Data.Aeson.TH
     Data.Aeson.Types
 
   other-modules:
+    Data.Aeson.Decoding.Conversion
     Data.Aeson.Decoding.Internal
     Data.Aeson.Encoding.Builder
     Data.Aeson.Internal.ByteString
     Data.Aeson.Internal.Functions
     Data.Aeson.Internal.Prelude
     Data.Aeson.Internal.Text
     Data.Aeson.Internal.TH
+    Data.Aeson.Internal.Unescape
     Data.Aeson.Internal.Word8
     Data.Aeson.Parser.Time
-    Data.Aeson.Parser.Unescape
     Data.Aeson.Types.Class
     Data.Aeson.Types.FromJSON
     Data.Aeson.Types.Generic
     Data.Aeson.Types.Internal
     Data.Aeson.Types.ToJSON
-    Data.Attoparsec.Time
-    Data.Attoparsec.Time.Internal
 
   -- GHC bundled libs
   build-depends:
@@ -138,8 +134,6 @@ library
   ghc-options:      -Wall
 
   -- String unescaping
-  hs-source-dirs:   src-pure
-  other-modules:    Data.Aeson.Parser.UnescapePure
 
   if flag(ordered-keymap)
     cpp-options: -DUSE_ORDEREDMAP=1

attoparsec-aeson/LICENSE

@@ -0,0 +1,30 @@
+Copyright (c) 2011, MailRank, Inc.
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+2. 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.
+
+3. Neither the name of the author nor the names of his contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE 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 AUTHORS 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.

attoparsec-aeson/attoparsec-aeson.cabal

@@ -0,0 +1,59 @@
+cabal-version: 1.12
+name:          attoparsec-aeson
+version:       2.2
+synopsis:      Parsing of aeson's Value with attoparsec
+description:
+  Parsing of aeson's Value with attoparsec, originally from aeson.
+
+license:       BSD3
+license-file:  LICENSE
+category:      Parsing
+copyright:
+  (c) 2011-2016 Bryan O'Sullivan
+  (c) 2011 MailRank, Inc.
+
+author:        Bryan O'Sullivan <[email protected]>
+maintainer:    Oleg Grenrus <[email protected]>
+stability:     experimental
+homepage:      https://github.com/haskell/aeson
+bug-reports:   https://github.com/haskell/aeson/issues
+build-type:    Simple
+tested-with:
+  GHC ==8.2.2
+   || ==8.4.4
+   || ==8.6.5
+   || ==8.8.4
+   || ==8.10.7
+   || ==9.0.2
+   || ==9.2.8
+   || ==9.4.5
+   || ==9.6.2
+
+library
+  hs-source-dirs:   src
+  default-language: Haskell2010
+  ghc-options:      -Wall
+  exposed-modules:
+    Data.Aeson.Parser
+    Data.Aeson.Parser.Internal
+
+  other-modules:
+    Data.Aeson.Internal.ByteString
+    Data.Aeson.Internal.Text
+    Data.Aeson.Internal.Word8
+
+  build-depends:
+      aeson               >=2.2      && <2.3
+    , attoparsec          >=0.14.2   && <0.15
+    , base                >=4.10.0.0 && <5
+    , bytestring          >=0.10.8.2 && <0.12
+    , integer-conversion  >=0.1      && <0.2
+    , primitive           >=0.8.0.0  && <0.9
+    , scientific          >=0.3.7.0  && <0.4
+    , text                >=1.2.3.0  && <1.3  || >=2.0 && <2.1
+    , vector              >=0.12.0.1 && <0.14
+
+source-repository head
+  type:     git
+  location: git://github.com/haskell/aeson.git
+  subdir:   attoparsec-aeson

attoparsec-aeson/src/Data/Aeson/Internal/ByteString.hs

@@ -0,0 +1 @@
+../../../../../src/Data/Aeson/Internal/ByteString.hs

attoparsec-aeson/src/Data/Aeson/Internal/Text.hs

@@ -0,0 +1 @@
+../../../../../src/Data/Aeson/Internal/Text.hs

attoparsec-aeson/src/Data/Aeson/Internal/Word8.hs

@@ -0,0 +1 @@
+../../../../../src/Data/Aeson/Internal/Word8.hs

src/Data/Aeson/Parser/Internal.hs → attoparsec-aeson/src/Data/Aeson/Parser/Internal.hs

@@ -44,25 +44,36 @@ module Data.Aeson.Parser.Internal
     , unescapeText
     ) where
 
-import Data.Aeson.Internal.Prelude
-
-import Data.Aeson.Types.Internal (IResult(..), JSONPath, Object, Result(..), Value(..), Key)
-import qualified Data.Aeson.KeyMap as KM
-import qualified Data.Aeson.Key as Key
+import Control.Applicative ((<|>))
+import Control.Monad (when, void)
 import Data.Attoparsec.ByteString.Char8 (Parser, char, decimal, endOfInput, isDigit_w8, signed, string)
+import Data.Function (fix)
+import Data.Functor (($>))
 import Data.Integer.Conversion (byteStringToInteger)
-import qualified Data.Vector as Vector (empty, fromList, fromListN, reverse)
+import Data.Scientific (Scientific)
+import Data.Text (Text)
+import Data.Vector (Vector)
+
+#if !MIN_VERSION_base(4,11,0)
+import Data.Semigroup ((<>))
+#endif
+
+import qualified Data.Aeson.Key as Key
+import qualified Data.Aeson.KeyMap as KM
 import qualified Data.Attoparsec.ByteString as A
 import qualified Data.Attoparsec.Lazy as L
 import qualified Data.ByteString as B
-import qualified Data.ByteString.Unsafe as B
-import qualified Data.ByteString.Lazy as L
+import qualified Data.ByteString.Builder as B
 import qualified Data.ByteString.Lazy as BSL
+import qualified Data.ByteString.Lazy as L
 import qualified Data.ByteString.Lazy.Char8 as C
-import qualified Data.ByteString.Builder as B
+import qualified Data.ByteString.Unsafe as B
 import qualified Data.Scientific as Sci
-import Data.Aeson.Parser.Unescape (unescapeText)
+import qualified Data.Vector as Vector (empty, fromList, fromListN, reverse)
+
+import Data.Aeson.Types (IResult(..), JSONPath, Object, Result(..), Value(..), Key)
 import Data.Aeson.Internal.Text
+import Data.Aeson.Decoding (unescapeText)
 import Data.Aeson.Internal.Word8
 
 -- $setup

benchmarks/aeson-benchmarks.cabal

@@ -49,6 +49,7 @@ executable aeson-benchmark-suite
   build-depends:
       aeson
     , attoparsec
+    , attoparsec-aeson
     , base
     , base-compat-batteries
     , base16-bytestring

benchmarks/bench/CompareWithJSON.hs

@@ -49,8 +49,8 @@ decode' s = fromMaybe (error "fail to parse via Aeson") $ A.decode' s
 decodeS :: BS.ByteString -> A.Value
 decodeS s = fromMaybe (error "fail to parse via Aeson") $ A.decodeStrict' s
 
-decodeIP :: BL.ByteString -> A.Value
-decodeIP s = fromMaybe (error "fail to parse via Parser.decodeWith") $
+decodeAtto :: BL.ByteString -> A.Value
+decodeAtto s = fromMaybe (error "fail to parse via Parser.decodeWith") $
     I.decodeWith I.jsonEOF A.fromJSON s
 
 encodeJ :: J.JSValue -> BL.ByteString
@@ -73,11 +73,11 @@ benchmark =
   bgroup "compare-json" [
       bgroup "decode" [
         bgroup "en" [
-          bench "aeson/lazy"     $ nf decode enA
-        , bench "aeson/strict"   $ nf decode' enA
-        , bench "aeson/stricter" $ nf decodeS enS
-        , bench "aeson/parser"   $ nf decodeIP enA
-        , bench "json"           $ nf decodeJ enJ
+          bench "aeson/lazy"       $ nf decode enA
+        , bench "aeson/strict"     $ nf decode' enA
+        , bench "aeson/stricter"   $ nf decodeS enS
+        , bench "aeson/attoparsec" $ nf decodeAtto enA
+        , bench "json"             $ nf decodeJ enJ
         ]
       , bgroup "jp" [
           bench "aeson"          $ nf decode jpA