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| -rw-r--r-- | gnu/packages/haskell-xyz.scm | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm index cef3261f45..510a77d9fb 100644 --- a/gnu/packages/haskell-xyz.scm +++ b/gnu/packages/haskell-xyz.scm @@ -6660,6 +6660,42 @@ of getters, folds, isomorphisms, traversals, setters and lenses and their indexed variants.") (license license:bsd-3))) +(define-public ghc-lens-family-core + (package + (name "ghc-lens-family-core") + (version "1.2.3") + (source + (origin + (method url-fetch) + (uri (string-append + "mirror://hackage/package/lens-family-core/lens-family-core-" + version + ".tar.gz")) + (sha256 + (base32 + "009rf10pj1cb50v44cc1pq7qvfrmkkk9dikahs9qmvbvgl3mykwi")))) + (build-system haskell-build-system) + (home-page + "http://hackage.haskell.org/package/lens-family-core") + (synopsis "Haskell 98 Lens Families") + (description + "This package provides first class functional references. In addition to +the usual operations of getting, setting and composition, plus integration +with the state monad, lens families provide some unique features: + +@itemize +@item Polymorphic updating +@item Traversals +@item Cast projection functions to read-only lenses +@item Cast @code{toList} functions to read-only traversals +@item Cast semantic editor combinators to modify-only traversals +@end itemize + +For optimal first-class support use the lens-family package with rank 2/rank N +polymorphism. @code{Lens.Family.Clone} allows for first-class support of +lenses and traversals for those who require Haskell 98.") + (license license:bsd-3))) + (define-public ghc-libffi (package (name "ghc-libffi") |