The generic-deepseq package
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 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 2.0.0.0:
Vastly improved performance. As a consequence of these changes, the member function of the DeepSeq class is now rnf, instead of deepseq.
New instances for functions, Ratio and Complex types.
Changes in version 2.0.1.0:
Fix the U1 and V1 instances.
Changes in version 2.0.1.1:
No functional changes, updated to correct the URLs of the repository and the issue tracker.
- No changelog available
Properties
| Versions | 1.0.0.0, 2.0.0.0, 2.0.1.0, 2.0.1.1 |
|---|---|
| Dependencies | base (>=3 && <5), ghc-prim (>=0.2) |
| License | BSD3 |
| Copyright | 2012, Maxime Henrion |
| Author | Maxime Henrion |
| Maintainer | Maxime Henrion <mhenrion@gmail.com> |
| Category | Control, Generics |
| Bug tracker | http://bitbucket.org/mux/generic-deepseq/issues/ |
| Source repository | head: hg clone http://bitbucket.org/mux/generic-deepseq/ |
| Upload date | Tue Feb 28 20:53:40 UTC 2012 |
| Uploaded by | MaximeHenrion |
| Downloads | 39 total |
Modules
- Control
Downloads
- generic-deepseq-2.0.1.1.tar.gz [browse] (Cabal source package)
- Package description (included in the package)
Maintainers' corner
For package maintainers and hackage trustees