lazyio: Run IO actions lazily while respecting their order
Run IO actions lazily while respecting their order. Running a value of the LazyIO monad in the IO monad is like starting a thread which is however driven by its output. That is, the LazyIO action is only executed as far as necessary in order to provide the required data.
The package may help you to avoid stack overflows in mapM
.
Say you have
mapM f xs
where xs
is a long list. When run, you may encounter a stack overflow.
To prevent it, write instead:
import qualified System.IO.Lazy as LazyIO LazyIO.run $ mapM (LazyIO.interleave . f) xs
The stack overflow is gone.
Flags
Automatic Flags
Name | Description | Default |
---|---|---|
splitbase | Choose the new smaller, split-up base package. | Enabled |
buildtests | Build test executables | Disabled |
Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info
Downloads
- lazyio-0.1.0.4.tar.gz [browse] (Cabal source package)
- Package description (revised from the package)
Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
Versions [RSS] | 0.0.1, 0.0.2, 0.0.3, 0.0.3.1, 0.0.3.2, 0.0.3.3, 0.1, 0.1.0.1, 0.1.0.2, 0.1.0.3, 0.1.0.4 |
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Change log | CHANGES |
Dependencies | base (>=1.0 && <5), special-functors (>=1.0 && <1.1), transformers (>=0.2 && <0.7), unsafe (>=0.0 && <0.1) [details] |
License | BSD-3-Clause |
Author | Henning Thielemann <haskell@henning-thielemann.de> |
Maintainer | Henning Thielemann <haskell@henning-thielemann.de> |
Revised | Revision 1 made by HenningThielemann at 2023-02-16T12:04:34Z |
Category | Monads, Control |
Home page | http://www.haskell.org/haskellwiki/Lazy_IO |
Source repo | head: darcs get http://code.haskell.org/~thielema/lazyio/ this: darcs get http://code.haskell.org/~thielema/lazyio/ --tag 0.1.0.4 |
Uploaded | by HenningThielemann at 2016-12-14T21:16:25Z |
Distributions | LTSHaskell:0.1.0.4, NixOS:0.1.0.4, Stackage:0.1.0.4 |
Reverse Dependencies | 4 direct, 4 indirect [details] |
Executables | test |
Downloads | 9035 total (40 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 2016-12-14 [all 1 reports] |