cabal-version: 2.4 name: fastsum version: 0.2.0.0 synopsis: A fast open-union type suitable for 100+ contained alternatives homepage: https://github.com/patrickt/fastsum#readme license: BSD-3-Clause license-file: LICENSE author: Rob Rix, Josh Vera, Allele Dev, Patrick Thomson maintainer: patrickt@github.com copyright: Rob Rix, Josh Vera, Allele Dev, Patrick Thomson 2016-2018 category: Data build-type: Simple extra-source-files: README.md ChangeLog.md tested-with: GHC == 8.2.2 GHC == 8.4.3 GHC == 8.6.3 GHC == 8.8.1 GHC == 8.10.7 GHC == 9.2.1 description: This package provides Data.Sum, an open-union type, similar to the Union type that powers the implementation of Oleg Kiselyov's extensible-effects library. . Unlike most open-union implementations, this type is very fast to compile, even when the type-level list of alternatives contains hundreds of entries. Membership queries are constant-time, compiling to a single type-level natural lookup in a closed type family, unlike the traditional encoding of Union, which relies on recursive typeclass lookups. As such, this type lends itself to representing abstract syntax trees or other rich data structures. . This project is safe to use in production. Any performance problems at compile-time or runtime should be filed as bugs. flag build-examples default: False library hs-source-dirs: src exposed-modules: Data.Sum other-modules: Data.Sum.Templates build-depends: base >= 4.7 && < 5 , deepseq >= 1.4 && <2 , ghc-prim >= 0.5 && <1 , hashable >= 1.2 && <2 , template-haskell >= 2.12 && < 2.19 default-language: Haskell2010 executable examples hs-source-dirs: examples main-is: Main.hs build-depends: base, fastsum default-language: Haskell2010 if !flag(build-examples) buildable: False source-repository head type: git location: https://github.com/patrickt/fastsum