free 5.1 → 5.1.1

raw patch · 10 files changed

+180/−139 lines, 10 filesdep ~basedep ~template-haskellPVP: major bump suggested

API removals or changes: PVP suggests a major version bump

Dependency ranges changed: base, template-haskell

API changes (from Hackage documentation)

Files

• .travis.yml +138/−117
• CHANGELOG.markdown +4/−0
• examples/PerfTH.hs +2/−1
• examples/RetryTH.hs +6/−5
• examples/free-examples.cabal +12/−5
• free.cabal +4/−3
• src/Control/Monad/Free.hs +2/−2
• src/Control/Monad/Trans/Free.hs +5/−3
• src/Control/Monad/Trans/Free/Ap.hs +5/−3
• src/Control/Monad/Trans/Iter.hs +2/−0

@@ -1,159 +1,180 @@ # This Travis job script has been generated by a script via #-#   runghc make_travis_yml_2.hs '-o' '.travis.yml' '--ghc-head' '--irc-channel=irc.freenode.org#haskell-lens' '--no-no-tests-no-bench' '--no-unconstrained' 'cabal.project'+#   haskell-ci '--output=.travis.yml' '--config=cabal.haskell-ci' 'cabal.project' #-# For more information, see https://github.com/hvr/multi-ghc-travis+# For more information, see https://github.com/haskell-CI/haskell-ci #+# version: 0.3.20190425+# language: c-sudo: false-+dist: xenial git:-  submodules: false  # whether to recursively clone submodules-+  # whether to recursively clone submodules+  submodules: false notifications:   irc:     channels:-      - "irc.freenode.org#haskell-lens"+      - irc.freenode.org#haskell-lens     skip_join: true     template:-      - "\x0313free\x03/\x0306%{branch}\x03 \x0314%{commit}\x03 %{build_url} %{message}"-+      - "\"\\x0313free\\x03/\\x0306%{branch}\\x03 \\x0314%{commit}\\x03 %{build_url} %{message}\"" cache:   directories:     - $HOME/.cabal/packages     - $HOME/.cabal/store- before_cache:-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log+  - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log   # remove files that are regenerated by 'cabal update'-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.*-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/*.json-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.cache-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar.idx--  - rm -rfv $HOME/.cabal/packages/head.hackage-+  - rm -fv $CABALHOME/packages/hackage.haskell.org/00-index.*+  - rm -fv $CABALHOME/packages/hackage.haskell.org/*.json+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx+  - rm -rfv $CABALHOME/packages/head.hackage matrix:   include:-    - compiler: "ghc-8.6.1"+    - compiler: ghc-8.8.1+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.8.1","cabal-install-3.0"]}}       env: GHCHEAD=true-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-8.6.1], sources: [hvr-ghc]}}-    - compiler: "ghc-8.4.3"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.4.3], sources: [hvr-ghc]}}-    - compiler: "ghc-8.2.2"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.2.2], sources: [hvr-ghc]}}-    - compiler: "ghc-8.0.2"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.0.2], sources: [hvr-ghc]}}-    - compiler: "ghc-7.10.3"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.10.3], sources: [hvr-ghc]}}-    - compiler: "ghc-7.8.4"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.8.4], sources: [hvr-ghc]}}-    - compiler: "ghc-7.6.3"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.6.3], sources: [hvr-ghc]}}-    - compiler: "ghc-7.4.2"-    # env: TEST=--disable-tests BENCH=--disable-benchmarks-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.4.2], sources: [hvr-ghc]}}-    - compiler: "ghc-head"+    - compiler: ghc-8.6.5+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}+    - compiler: ghc-8.4.4+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.4.4","cabal-install-2.4"]}}+    - compiler: ghc-8.2.2+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.2.2","cabal-install-2.4"]}}+    - compiler: ghc-8.0.2+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.0.2","cabal-install-2.4"]}}+    - compiler: ghc-7.10.3+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-7.10.3","cabal-install-2.4"]}}+    - compiler: ghc-7.8.4+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-7.8.4","cabal-install-2.4"]}}+    - compiler: ghc-7.6.3+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-7.6.3","cabal-install-2.4"]}}+    - compiler: ghc-7.4.2+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-7.4.2","cabal-install-2.4"]}}+    - compiler: ghc-head+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-head","cabal-install-head"]}}       env: GHCHEAD=true-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-head], sources: [hvr-ghc]}}-   allow_failures:-    - compiler: "ghc-head"-    - compiler: "ghc-8.6.1"-+    - compiler: ghc-head+    - compiler: ghc-8.8.1 before_install:-  - HC=${CC}-  - HCPKG=${HC/ghc/ghc-pkg}+  - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')+  - HCPKG="$HC-pkg"   - unset CC-  - ROOTDIR=$(pwd)-  - mkdir -p $HOME/.local/bin-  - "PATH=/opt/ghc/bin:/opt/ghc-ppa-tools/bin:$HOME/local/bin:$PATH"+  - CABAL=/opt/ghc/bin/cabal+  - CABALHOME=$HOME/.cabal+  - export PATH="$CABALHOME/bin:$PATH"+  - TOP=$(pwd)   - HCNUMVER=$(( $(${HC} --numeric-version|sed -E 's/([0-9]+)\.([0-9]+)\.([0-9]+).*/\1 * 10000 + \2 * 100 + \3/') ))   - echo $HCNUMVER-+  - CABAL="$CABAL -vnormal+nowrap+markoutput"+  - set -o pipefail+  - |+    echo 'function blue(s) { printf "\033[0;34m" s "\033[0m " }'           >> .colorful.awk+    echo 'BEGIN { state = "output"; }'                                     >> .colorful.awk+    echo '/^-----BEGIN CABAL OUTPUT-----$/ { state = "cabal" }'            >> .colorful.awk+    echo '/^-----END CABAL OUTPUT-----$/ { state = "output" }'             >> .colorful.awk+    echo '!/^(-----BEGIN CABAL OUTPUT-----|-----END CABAL OUTPUT-----)/ {' >> .colorful.awk+    echo '  if (state == "cabal") {'                                       >> .colorful.awk+    echo '    print blue($0)'                                              >> .colorful.awk+    echo '  } else {'                                                      >> .colorful.awk+    echo '    print $0'                                                    >> .colorful.awk+    echo '  }'                                                             >> .colorful.awk+    echo '}'                                                               >> .colorful.awk+  - cat .colorful.awk+  - |+    color_cabal_output () {+      awk -f $TOP/.colorful.awk+    }+  - echo text | color_cabal_output install:-  - cabal --version+  - ${CABAL} --version   - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"-  - BENCH=${BENCH---enable-benchmarks}-  - TEST=${TEST---enable-tests}-  - HADDOCK=${HADDOCK-true}-  - UNCONSTRAINED=${UNCONSTRAINED-true}-  - NOINSTALLEDCONSTRAINTS=${NOINSTALLEDCONSTRAINTS-false}+  - TEST=--enable-tests+  - BENCH=--enable-benchmarks   - GHCHEAD=${GHCHEAD-false}-  - travis_retry cabal update -v-  - "sed -i.bak 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config"-  - rm -fv cabal.project cabal.project.local-  # Overlay Hackage Package Index for GHC HEAD: https://github.com/hvr/head.hackage+  - rm -f $CABALHOME/config   - |+    echo "verbose: normal +nowrap +markoutput"          >> $CABALHOME/config+    echo "remote-build-reporting: anonymous"            >> $CABALHOME/config+    echo "remote-repo-cache: $CABALHOME/packages"       >> $CABALHOME/config+    echo "logs-dir:          $CABALHOME/logs"           >> $CABALHOME/config+    echo "world-file:        $CABALHOME/world"          >> $CABALHOME/config+    echo "extra-prog-path:   $CABALHOME/bin"            >> $CABALHOME/config+    echo "symlink-bindir:    $CABALHOME/bin"            >> $CABALHOME/config+    echo "installdir:        $CABALHOME/bin"            >> $CABALHOME/config+    echo "build-summary:     $CABALHOME/logs/build.log" >> $CABALHOME/config+    echo "store-dir:         $CABALHOME/store"          >> $CABALHOME/config+    echo "install-dirs user"                            >> $CABALHOME/config+    echo "  prefix: $CABALHOME"                         >> $CABALHOME/config+    echo "repository hackage.haskell.org"               >> $CABALHOME/config+    echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config+  - |     if $GHCHEAD; then-      sed -i 's/-- allow-newer: .*/allow-newer: *:base/' ${HOME}/.cabal/config-      for pkg in $($HCPKG list --simple-output); do pkg=$(echo $pkg | sed 's/-[^-]*$//'); sed -i "s/allow-newer: /allow-newer: *:$pkg, /" ${HOME}/.cabal/config; done--      echo 'repository head.hackage'                                                        >> ${HOME}/.cabal/config-      echo '   url: http://head.hackage.haskell.org/'                                       >> ${HOME}/.cabal/config-      echo '   secure: True'                                                                >> ${HOME}/.cabal/config-      echo '   root-keys: 07c59cb65787dedfaef5bd5f987ceb5f7e5ebf88b904bbd4c5cbdeb2ff71b740' >> ${HOME}/.cabal/config-      echo '              2e8555dde16ebd8df076f1a8ef13b8f14c66bad8eafefd7d9e37d0ed711821fb' >> ${HOME}/.cabal/config-      echo '              8f79fd2389ab2967354407ec852cbe73f2e8635793ac446d09461ffb99527f6e' >> ${HOME}/.cabal/config-      echo '   key-threshold: 3'                                                            >> ${HOME}/.cabal.config--      grep -Ev -- '^\s*--' ${HOME}/.cabal/config | grep -Ev '^\s*$'--      cabal new-update head.hackage -v+    echo "allow-newer: $($HCPKG list --simple-output | sed -E 's/([a-zA-Z-]+)-[0-9.]+/*:\1/g')" >> $CABALHOME/config+    +    echo "repository head.hackage"                                                        >> $CABALHOME/config+    echo "   url: http://head.hackage.haskell.org/"                                       >> $CABALHOME/config+    echo "   secure: True"                                                                >> $CABALHOME/config+    echo "   root-keys: 07c59cb65787dedfaef5bd5f987ceb5f7e5ebf88b904bbd4c5cbdeb2ff71b740" >> $CABALHOME/config+    echo "              2e8555dde16ebd8df076f1a8ef13b8f14c66bad8eafefd7d9e37d0ed711821fb" >> $CABALHOME/config+    echo "              8f79fd2389ab2967354407ec852cbe73f2e8635793ac446d09461ffb99527f6e" >> $CABALHOME/config+    echo "   key-threshold: 3"                                                            >> $CABALHOME/config     fi-  - grep -Ev -- '^\s*--' ${HOME}/.cabal/config | grep -Ev '^\s*$'-  - "printf 'packages: \".\" \"./examples\"\\n' > cabal.project"-  - echo 'package free-examples' >> cabal.project-  - "echo '  flags: -mandelbrot-iter' >> cabal.project"-  - touch cabal.project.local-  - "if ! $NOINSTALLEDCONSTRAINTS; then for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/^/constraints: /' | sed 's/-[^-]*$/ installed/' >> cabal.project.local; done; fi"+  - cat $CABALHOME/config+  - rm -fv cabal.project cabal.project.local cabal.project.freeze+  - travis_retry ${CABAL} v2-update -v+  # Generate cabal.project+  - rm -rf cabal.project cabal.project.local cabal.project.freeze+  - touch cabal.project+  - |+    echo 'packages: "."' >> cabal.project+    echo 'packages: "./examples"' >> cabal.project+  - |+    echo "package free-examples"               >> cabal.project+    echo "  flags: -mandelbrot-iter"           >> cabal.project+    echo ""                                    >> cabal.project+    echo "write-ghc-environment-files: always" >> cabal.project+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | grep -vE -- '^(free|free-examples)$' | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"   - cat cabal.project || true   - cat cabal.project.local || true-  - if [ -f "./configure.ac" ]; then-      (cd "." && autoreconf -i);-    fi-  - if [ -f "./examples/configure.ac" ]; then-      (cd "./examples" && autoreconf -i);-    fi-  - rm -f cabal.project.freeze-  - cabal new-build -w ${HC} ${TEST} ${BENCH} --project-file="cabal.project" --dep -j2 all-  - rm -rf .ghc.environment.* "."/dist "./examples"/dist-  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)--# Here starts the actual work to be performed for the package under test;-# any command which exits with a non-zero exit code causes the build to fail.+  - if [ -f "./configure.ac" ]; then (cd "." && autoreconf -i); fi+  - if [ -f "./examples/configure.ac" ]; then (cd "./examples" && autoreconf -i); fi+  - ${CABAL} v2-freeze -w ${HC} ${TEST} ${BENCH} | color_cabal_output+  - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"+  - rm  cabal.project.freeze+  - ${CABAL} v2-build -w ${HC} ${TEST} ${BENCH} --dep -j2 all | color_cabal_output script:-  # test that source-distributions can be generated-  - (cd "." && cabal sdist)-  - (cd "./examples" && cabal sdist)-  - mv "."/dist/free-*.tar.gz "./examples"/dist/free-examples-*.tar.gz ${DISTDIR}/+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)+  # Packaging...+  - ${CABAL} v2-sdist all | color_cabal_output+  # Unpacking...+  - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/   - cd ${DISTDIR} || false   - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;-  - "printf 'packages: free-*/*.cabal free-examples-*/*.cabal\\n' > cabal.project"-  - echo 'package free-examples' >> cabal.project-  - "echo '  flags: -mandelbrot-iter' >> cabal.project"-  - touch cabal.project.local-  - "if ! $NOINSTALLEDCONSTRAINTS; then for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/^/constraints: /' | sed 's/-[^-]*$/ installed/' >> cabal.project.local; done; fi"+  # Generate cabal.project+  - rm -rf cabal.project cabal.project.local cabal.project.freeze+  - touch cabal.project+  - |+    echo 'packages: "free-*/*.cabal"' >> cabal.project+    echo 'packages: "free-examples-*/*.cabal"' >> cabal.project+  - |+    echo "package free-examples"               >> cabal.project+    echo "  flags: -mandelbrot-iter"           >> cabal.project+    echo ""                                    >> cabal.project+    echo "write-ghc-environment-files: always" >> cabal.project+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | grep -vE -- '^(free|free-examples)$' | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"   - cat cabal.project || true   - cat cabal.project.local || true-+  # Building with tests and benchmarks...   # build & run tests, build benchmarks-  - cabal new-build -w ${HC} ${TEST} ${BENCH} all--  # cabal check-  - (cd free-* && cabal check)-  - (cd free-examples-* && cabal check)--  # haddock-  - rm -rf ./dist-newstyle-  - if $HADDOCK; then cabal new-haddock -w ${HC} ${TEST} ${BENCH} all; else echo "Skipping haddock generation";fi+  - ${CABAL} v2-build -w ${HC} ${TEST} ${BENCH} all | color_cabal_output+  # cabal check...+  - (cd free-* && ${CABAL} -vnormal check)+  - (cd free-examples-* && ${CABAL} -vnormal check)+  # haddock...+  - ${CABAL} v2-haddock -w ${HC} ${TEST} ${BENCH} all | color_cabal_output -# REGENDATA ["-o",".travis.yml","--ghc-head","--irc-channel=irc.freenode.org#haskell-lens","--no-no-tests-no-bench","--no-unconstrained","cabal.project"]+# REGENDATA ["--output=.travis.yml","--config=cabal.haskell-ci","cabal.project"] # EOF

@@ -1,3 +1,7 @@+5.1.1 [2019.05.02]+------------------+* Allow building with `base-4.13` (GHC 8.8).+ 5.1 [2018.07.03] ---------------- * Generalize the type of `_Free`.

@@ -12,6 +12,7 @@ import Data.Word import Control.Monad import Control.Monad.State.Strict+import Control.Monad.Fail (MonadFail) import Control.Monad.Free import Control.Monad.Free.TH import qualified Control.Monad.Free.Church as Church@@ -65,7 +66,7 @@     return a  -- | Church-based interpreter-runPerfF :: (MonadIO m) => [String] -> Church.F PerfF () -> m ()+runPerfF :: (MonadFail m, MonadIO m) => [String] -> Church.F PerfF () -> m () runPerfF [] _ = return () runPerfF ss0 f =   fst `liftM` do

@@ -5,9 +5,11 @@ module Main where  import Control.Monad+import Control.Monad.Fail as Fail import Control.Monad.Free import Control.Monad.Free.TH import Control.Monad.IO.Class+import Control.Monad.Trans.Instances () import Control.Monad.Trans.Maybe import qualified Data.Foldable as F import Text.Read.Compat (readMaybe)@@ -53,10 +55,10 @@ -- retry      :: MonadFree RetryF m => m a  -- | We can run a retriable program in any MonadIO.-runRetry :: MonadIO m => Retry a -> m a+runRetry :: (MonadFail m, MonadIO m) => Retry a -> m a runRetry = iterM run   where-    run :: MonadIO m => RetryF (m a) -> m a+    run :: (MonadFail m, MonadIO m) => RetryF (m a) -> m a      run (Output s next) = do       liftIO $ putStrLn s@@ -66,7 +68,7 @@       s <- liftIO getLine       case readMaybe s of         Just x  -> next x-        Nothing -> fail "invalid input"+        Nothing -> Fail.fail "invalid input"      run (WithRetry block next) = do       -- Here we use@@ -76,7 +78,7 @@       Just x <- runMaybeT . F.msum $ repeat (runRetry block)       next x -    run Retry = fail "forced retry"+    run Retry = Fail.fail "forced retry"  -- | Sample program. test :: Retry ()@@ -92,4 +94,3 @@  main :: IO () main = runRetry test-

@@ -16,8 +16,9 @@              , GHC == 7.10.3              , GHC == 8.0.2              , GHC == 8.2.2-             , GHC == 8.4.3-             , GHC == 8.6.1+             , GHC == 8.4.4+             , GHC == 8.6.5+             , GHC == 8.8.1 synopsis:      Monads for free description:   Examples projects using @free@ build-type:    Simple@@ -41,6 +42,9 @@     mtl          >= 2.0.1 && < 2.3,     transformers >= 0.2   && < 0.6 +-- This example depends on the HGL library which, unfortunately, fails to+-- compile on GHC 8.4 or later. (See https://github.com/xpika/hgl/issues/3.)+-- Build at your own risk. executable free-mandelbrot-iter   if !flag(mandelbrot-iter)     buildable: False@@ -73,6 +77,7 @@   build-depends:     base         == 4.*,     base-compat,+    fail         == 4.9.*,     free,     mtl          >= 2.0.1 && < 2.3,     rdtsc,@@ -82,12 +87,14 @@   hs-source-dirs: .   default-language: Haskell2010   main-is: RetryTH.hs-  ghc-options: -Wall+  ghc-options: -Wall -fno-warn-orphans   build-depends:-    base         == 4.*,+    base                == 4.*,     base-compat,+    fail                == 4.9.*,     free,-    transformers >= 0.2 && < 0.6+    transformers        >= 0.2   && < 0.6,+    transformers-compat >= 0.6.4 && < 0.7  executable free-teletype   hs-source-dirs: .

@@ -1,6 +1,6 @@ name:          free category:      Control, Monads-version:       5.1+version:       5.1.1 license:       BSD3 cabal-version: 1.18 license-file:  LICENSE@@ -16,8 +16,9 @@              , GHC == 7.10.3              , GHC == 8.0.2              , GHC == 8.2.2-             , GHC == 8.4.3-             , GHC == 8.6.1+             , GHC == 8.4.4+             , GHC == 8.6.5+             , GHC == 8.8.1 synopsis:      Monads for free description:   Free monads are useful for many tree-like structures and domain specific languages.

@@ -82,7 +82,7 @@ -- -- then 'Free' is the left adjoint to @U@. ----- Being 'Free' being left adjoint to @U@ means that there is an isomorphism between+-- 'Free' being left adjoint to @U@ means that there is an isomorphism between -- -- @'Free' f -> m@ in the category of monads and @f -> U m@ in the category of functors. --@@ -355,7 +355,7 @@ iterM _   (Pure x) = return x iterM phi (Free f) = phi (iterM phi <$> f) --- | Lift a natural transformation from @f@ to @g@ into a natural transformation from @'FreeT' f@ to @'FreeT' g@.+-- | Lift a natural transformation from @f@ to @g@ into a natural transformation from @'Free' f@ to @'Free' g@. hoistFree :: Functor g => (forall a. f a -> g a) -> Free f b -> Free g b hoistFree _ (Pure a)  = Pure a hoistFree f (Free as) = Free (hoistFree f <$> f as)

@@ -308,10 +308,12 @@     Pure a -> runFreeT (f a)     Free w -> return (Free (fmap (>>= f) w)) -  fail = Fail.fail--instance (Functor f, Monad m) => Fail.MonadFail (FreeT f m) where+#if !MIN_VERSION_base(4,13,0)   fail e = FreeT (fail e)+#endif++instance (Functor f, Fail.MonadFail m) => Fail.MonadFail (FreeT f m) where+  fail e = FreeT (Fail.fail e)  instance MonadTrans (FreeT f) where   lift = FreeT . liftM Pure

@@ -307,10 +307,12 @@   FreeT m >>= f = FreeT $ m >>= \v -> case v of     Pure a -> runFreeT (f a)     Free w -> return (Free (fmap (>>= f) w))-  fail = Fail.fail--instance (Applicative f, Applicative m, Monad m) => Fail.MonadFail (FreeT f m) where+#if !MIN_VERSION_base(4,13,0)   fail e = FreeT (fail e)+#endif++instance (Applicative f, Applicative m, Fail.MonadFail m) => Fail.MonadFail (FreeT f m) where+  fail e = FreeT (Fail.fail e)  instance MonadTrans (FreeT f) where   lift = FreeT . liftM Pure

@@ -219,8 +219,10 @@   {-# INLINE return #-}   IterT m >>= k = IterT $ m >>= either (runIterT . k) (return . Right . (>>= k))   {-# INLINE (>>=) #-}+#if !MIN_VERSION_base(4,13,0)   fail = Fail.fail   {-# INLINE fail #-}+#endif  instance Monad m => Fail.MonadFail (IterT m) where   fail _ = never