storable-enum: Wrapper that makes any Enum type Storable
In foreign function interfaces you will often want to use enumeration types
but defining Storable
instances is cumbersome.
This package provides the type Enum.Storable.T w e
,
where e.g. Enum.Storable.T Word8 Ordering
means that values of type Ordering
are stored in a Word8
.
The Storable
methods store the numeric values of the enumeration elements
as obtained by fromEnum
.
E.g. EQ
is stored as 1
.
The type itself stores a Haskell enumeration element,
such that GHC can apply all of its optimizations for enumerations.
It is not checked, whether the storage type w
is large enough
to hold all admissible numeric values of e
.
It is also not checked, whether the storage type w
supports negative values
whenever the enumeration of e
contains ones.
See the bool8
package for the special case of a Bool
stored in a Word8
.
Downloads
- storable-enum-0.0.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
Versions [RSS] | 0.0 |
---|---|
Dependencies | base (>=3 && <5), prelude-compat (>=0.0 && <0.0.1) [details] |
Tested with | ghc ==7.4.2, ghc ==8.6.5 |
License | BSD-3-Clause |
Author | Henning Thielemann |
Maintainer | haskell@henning-thielemann.de |
Category | Foreign |
Source repo | this: darcs get http://hub.darcs.net/thielema/storable-enum --tag 0.0 head: darcs get http://hub.darcs.net/thielema/storable-enum |
Uploaded | by HenningThielemann at 2019-10-08T15:52:20Z |
Distributions | NixOS:0.0 |
Reverse Dependencies | 3 direct, 6 indirect [details] |
Downloads | 674 total (8 in the last 30 days) |
Rating | (no votes yet) [estimated by Bayesian average] |
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Status | Docs available [build log] Last success reported on 2019-10-08 [all 1 reports] |