The generic-deepseq package

[ Tags: bsd3, control, generics, library ] [ Propose Tags ]

This package provides a deepseq function analogous to seq, except that it traverses the entire data structure, evaluating it fully, and not just up to head normal form.

Using lists as an example:

> [1,2,undefined] `seq` 3

Whereas with deepseq:

> [1,2,undefined] `deepseq` 3
*** Exception: Prelude.undefined

Unlike the deepseq package, this implementation is based on the GHC.Generics framework as found in GHC >= 7.2, so that it can generate instances automatically for any datatype that has a Generic instance, without further code.

data MyType = MyType String Int (Maybe Double)
  deriving Generic
instance DeepSeq MyType

Changes in version

Changes in version


Dependencies base (>=4.4 && <5), ghc-prim (>=0.2) [details]
License BSD3
Copyright 2012, Maxime Henrion
Author Maxime Henrion
Maintainer Maxime Henrion <>
Category Control, Generics
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Source repository head: hg clone
Uploaded Sat Feb 25 11:00:47 UTC 2012 by MaximeHenrion
Updated Sat May 9 12:17:29 UTC 2015 by AdamBergmark to revision 1
Distributions NixOS:
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