Add flake/HIE/README.
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# direnv
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*.sw?
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.direnv
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.gopath
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/direnv
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/direnv.test
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/dist
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/test/config
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/test/data
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/test/scenarios/inherited/.envrc
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# fused-effects
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.stack-work
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dist-newstyle
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dist
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# fused-effects-exceptions
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[](https://hackage.haskell.org/package/fused-effects-exceptions)
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[](LICENSE)
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[](https://github.com/fused-effects/fused-effects-exceptions/actions)
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<!--
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Setup, hidden from the rendered markdown.
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@ -20,7 +18,7 @@ main = pure ()
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-->
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This package provides `Control.Effect.Exception`, a module that wraps the [`Control.Exception`](http://hackage.haskell.org/package/base/docs/Control-Exception.html) API from `base` with the vocabulary provided by the [`fused-effects`](http://hackage.haskell.org/package/fused-effects) library. These functions interact with GHC's support for dynamic exceptions, including functions like `catch` for exception handling and `bracket` for resource management.
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This fork provides `Control.Effect.Exception[.UnliftIO]`, a module that wraps the [`Control.Exception`](http://hackage.haskell.org/package/base/docs/Control-Exception.html) and [`UnliftIO.Exception`](https://hackage.haskell.org/package/unliftio-0.2.21.0/docs/UnliftIO-Exception.html) API from `base` with the vocabulary provided by the [`fused-effects`](http://hackage.haskell.org/package/fused-effects) library. These functions interact with GHC's support for dynamic exceptions, including functions like `catch` for exception handling and `bracket` for resource management.
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Please be aware that injudicious use of these functions may provoke surprising interactions with carriers that thread a monadic state as a parameter, à la the `Control.Carrier.State` types provided by `fused-effects`. For example, a function like `finally`, which does not thread any state from its body to its handler block, may discard state writes in cleanup handlers:
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{
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"nodes": {
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"flake-utils": {
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"locked": {
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"lastModified": 1648297722,
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"narHash": "sha256-W+qlPsiZd8F3XkzXOzAoR+mpFqzm3ekQkJNa+PIh1BQ=",
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"owner": "numtide",
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"repo": "flake-utils",
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"rev": "0f8662f1319ad6abf89b3380dd2722369fc51ade",
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"type": "github"
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},
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"original": {
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"owner": "numtide",
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"repo": "flake-utils",
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"type": "github"
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}
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},
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"nixpkgs": {
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"locked": {
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"lastModified": 1648648646,
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"narHash": "sha256-pHAq/GvsP7zRHkUTCs+4d31C0IEtTIuC6/TFASIA+zg=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "efea022d6fe0da84aa6613d4ddeafb80de713457",
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"type": "github"
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},
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"original": {
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"owner": "nixos",
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"ref": "nixos-21.11",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"root": {
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"inputs": {
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"flake-utils": "flake-utils",
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"nixpkgs": "nixpkgs"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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{
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description = "Handle exceptions thrown in IO with fused-effects.";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-21.11";
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flake-utils = {
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url = "github:numtide/flake-utils";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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};
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outputs = { self, nixpkgs, flake-utils }:
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let
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name = "fused-effects-exceptions";
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in
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{
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overlay = final: prev: {
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haskellPackages = prev.haskellPackages.override {
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overrides = _self: _super: {
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"${name}" = prev.haskellPackages.callCabal2nix name self { };
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};
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};
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};
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} // (flake-utils.lib.eachDefaultSystem (system:
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let
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pkgs = import nixpkgs {
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inherit system;
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overlays = [ self.overlay ];
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};
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haskell = {
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ghc = pkgs.haskellPackages.ghc;
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hls = pkgs.haskell-language-server.override {
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supportedGhcVersions = [ "8107" ];
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};
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};
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in
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with pkgs; {
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packages = {
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"${name}" = pkgs.haskellPackages.callCabal2nix name self { };
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};
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defaultPackage = self.packages.${system}.${name};
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devShell = mkShell {
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buildInputs = [
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haskell.ghc
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haskell.hls
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gdb
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haskellPackages.cabal-install
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haskellPackages.stylish-haskell
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];
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};
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}));
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}
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@ -47,7 +47,7 @@ test-suite test
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base
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, fused-effects-exceptions
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, fused-effects
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, tasty ^>= 1.2
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, tasty ^>= 1.4
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, tasty-hunit ^>= 0.10
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, transformers
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