@@ -3078,6 +3078,45 @@ It includes hashing functions for all basic Haskell98 types.")
"This module provides set and multiset operations on ordered lists.")
(license license:bsd-3)))
+(define-public ghc-data-tree-print
+ (package
+ (name "ghc-data-tree-print")
+ (version "0.1.0.2")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append
+ "https://hackage.haskell.org/package/data-tree-print/data-tree-print-"
+ version
+ ".tar.gz"))
+ (sha256
+ (base32
+ "00jh37anim8qsn553467gmfhajcz1c61zrgh1ypkqsll0gc29vy3"))))
+ (build-system haskell-build-system)
+ (inputs `(("ghc-syb" ,ghc-syb)))
+ (arguments
+ `(#:cabal-revision
+ ("2"
+ "00qpzhm3lndhpql8aj93aj6r3x9n0gw3nx6n0q60xxrd6agyjifq")))
+ (home-page "https://github.com/lspitzner/data-tree-print")
+ (synopsis "Print Data instances as a nested tree")
+ (description "This package provides functionality similar to that of the
+@code{Show} class: Taking some arbitrary value and returning a String.
+
+@itemize
+@item
+Output is not intended to be valid haskell.
+@item
+Requires a @code{Data.Data.Data} instance instead of a @code{Text.Show} one.
+@item
+Output, if large, is often easier to parse than @code{show} output due to the
+formatting as a nested tree.
+@item
+The user can adapt the behaviour at runtime using custom layouting expressed
+via syb-style extension.
+@end itemize")
+ (license license:bsd-3)))
+
(define-public ghc-dbus
(package
(name "ghc-dbus")