cabal-version: 3.0 name: no-recursion version: 0.1.0.0 synopsis: A GHC plugin to remove support for recursion description: General recursion can be the cause of a lot of problems. This removes recursion from GHC, allowing you to guarantee you’re using other mechanisms, like recursion schemes. author: Greg Pfeil maintainer: Greg Pfeil copyright: 2024 Greg Pfeil homepage: https://github.com/sellout/no-recursion#readme bug-reports: https://github.com/sellout/no-recursion/issues category: Recursion build-type: Custom license: AGPL-3.0-or-later license-files: LICENSE tested-with: GHC == { -- GHCup Nixpkgs 8.0.2, 8.2.2, 8.4.1, 8.6.1, 8.8.1, 8.8.4, 8.10.1, 8.10.7, 9.0.1, 9.0.2, 9.2.1, 9.2.8, 9.4.1, 9.4.8, 9.6.1, 9.6.2, 9.8.1 } source-repository head type: git location: https://github.com/sellout/no-recursion -- This mimics the GHC2021 extension -- (https://ghc.gitlab.haskell.org/ghc/doc/users_guide/exts/control.html?highlight=doandifthenelse#extension-GHC2021), -- but supporting compilers back to GHC 7.10. If the oldest supported compiler -- is GHC 9.2, then this stanza can be removed and `import: GHC2021` can be -- replaced by `default-language: GHC2021`. common GHC2021 default-language: Haskell2010 default-extensions: BangPatterns BinaryLiterals ConstraintKinds DeriveDataTypeable DeriveGeneric -- DeriveLift -- uncomment if the oldest supported version is GHC 8.10.1+ DeriveTraversable -- DerivingStrategies -- uncomment if the oldest supported version is GHC 8.2.1+ DoAndIfThenElse EmptyCase ExistentialQuantification FlexibleContexts FlexibleInstances GADTSyntax GeneralizedNewtypeDeriving -- HexFloatLiterals -- uncomment if the oldest supported version is GHC 8.4.1+ -- ImportQualifiedPost -- uncomment if the oldest supported version is GHC 8.10.1+ InstanceSigs LambdaCase MagicHash MonadComprehensions MonomorphismRestriction MultiParamTypeClasses NamedFieldPuns NamedWildCards -- NumericUnderscores -- uncomment if the oldest supported version is GHC 8.6.1+ PolyKinds PostfixOperators RankNTypes ScopedTypeVariables StandaloneDeriving -- StandaloneKindSignatures -- uncomment if the oldest supported version is GHC 8.10.1+ TupleSections -- TypeApplications -- uncomment if the oldest supported version is GHC 8.0.1+ TypeOperators UnicodeSyntax NoExplicitNamespaces flag noisy-deprecations description: Prior to GHC 9.10, the `DEPRECATED` pragma can’t distinguish between terms and types. Consenquently, you can get spurious warnings when there’s a name collision and the name in the other namespace is deprecated. Or you can choose to not get those warnings, at the risk of not being warned when there’s a name collision and the namespace you’re referencing is the one that’s deprecated. common defaults import: GHC2021 build-depends: base ^>= {4.9.1, 4.10.1, 4.11.0, 4.12.0, 4.13.0, 4.14.0, 4.15.0, 4.16.0, 4.17.0, 4.18.0, 4.19.0}, ghc-options: -Weverything -fpackage-trust -trust base if impl(ghc >= 8.0.1) ghc-options: -- This one just reports unfixable things, AFAICT. -Wno-all-missed-specialisations -- Type inference good. -Wno-missing-local-signatures -- Warns even when `Unsafe` is explicit, not inferred. See -- https://gitlab.haskell.org/ghc/ghc/-/issues/16689 -Wno-unsafe if impl(ghc < 8.8.1) ghc-options: -- This used to warn even when `Safe` was explicit. -Wno-safe if impl(ghc >= 8.10.1) ghc-options: -- If we didn’t allow inferred-safe imports, nothing would be `Safe`. -Wno-inferred-safe-imports -- We support GHC versions without qualified-post. -Wno-prepositive-qualified-module -- `-trust` triggers this warning when applied to transitive dependencies. -Wno-unused-packages if impl(ghc >= 9.2.1) ghc-options: -- We support GHC versions without kind signatures. -Wno-missing-kind-signatures if impl(ghc >= 9.8.1) ghc-options: -- We support GHC versions without kind signatures. -Wno-missing-poly-kind-signatures -- Inference good. -Wno-missing-role-annotations default-extensions: DefaultSignatures ExplicitNamespaces FunctionalDependencies LiberalTypeSynonyms -- replace with `LexicalNegation` if the oldest supported version is GHC 9.0.1+ NegativeLiterals PackageImports ParallelListComp -- QualifiedDo - uncomment if the oldest supported version is GHC 9.0.1+ RecursiveDo -- RequiredTypeArguments - uncomment if the oldest supported version is GHC 9.10.1+ -- TemplateHaskellQuotes - uncomment if the oldest supported version is GHC 8.0.1+ TransformListComp NoGeneralizedNewtypeDeriving NoImplicitPrelude NoMonomorphismRestriction NoPatternGuards -- NoStarIsType - uncomment if the oldest supported version is GHC 8.6.1+ -- NoTypeApplications - uncomment if the oldest supported version is GHC 8.0.1+ if impl(ghc >= 8.0.1) default-extensions: StrictData if flag(noisy-deprecations) cpp-options: -DSELLOUT_NOISY_DEPRECATIONS custom-setup setup-depends: -- TODO: Remove `Cabal` dep once haskell/cabal#3751 is fixed. Cabal ^>= {3.0.0, 3.2.0, 3.4.0, 3.6.0, 3.8.0, 3.10.0}, base ^>= {4.8.2, 4.9.0, 4.10.0, 4.11.0, 4.12.0, 4.13.0, 4.14.0, 4.15.0, 4.16.0, 4.17.0, 4.18.0, 4.19.0}, cabal-doctest ^>= 1.0.0, library import: defaults hs-source-dirs: src build-depends: ghc ^>= {8.0.2, 8.2.2, 8.4.1, 8.6.1, 8.8.1, 8.10.1, 9.0.1, 9.2.1, 9.4.1, 9.6.1, 9.8.1}, exposed-modules: NoRecursion test-suite doctests import: defaults type: exitcode-stdio-1.0 hs-source-dirs: tests main-is: doctests.hs build-depends: doctest ^>= {0.16.0, 0.18.1, 0.20.1, 0.21.1, 0.22.2}, no-recursion, -- TODO: The sections below here are necessary because we don’t have control -- over the generated `Build_doctests.hs` file. So we have to silence -- all of its warnings one way or another. ghc-options: -Wno-missing-import-lists -Wno-safe if impl(ghc >= 8.4.1) ghc-options: -Wno-missing-export-lists if impl(ghc >= 8.8.1) ghc-options: -- This used to warn even when `Safe` was explicit. -Wno-missing-deriving-strategies default-extensions: -- Since we can’t add `{-# LANGUAGE Safe -#}` to the generated -- “Build_doctests.hs”, we set it here, and that means it has to match -- doctests.hs, which is `Unsafe`. Unsafe