base-feature-macros: Semantic CPP feature macros for base
This provides a set of feature macros describing features of
base in a semantic way.
See base-feature-macros.h for set of currently provided macros.
In order to use the CPP header provided by this package, add this package as a dependency to your
.cabal file, i.e.
build-depends: base-feature-macros: >= 0.1 && < 0.2
while making sure that the version specified as lower bound defines the feature-macros your code tests for. This is particularly important as CPP will implicitly treat undefined CPP macros as having the value
0. See also GNU CPP/CC's
-Wundef warning to detect such errors.
Then in your code, you can include and use the
<base-feature-macros.h> header like so
module M where #include <base-feature-macros.h> #if !HAVE_FOLDABLE_TRAVERSABLE_IN_PRELUDE import Data.Foldable (Foldable (..)) import Prelude hiding (foldr, foldr1) #endif #if !HAVE_MONOID_IN_PRELUDE import Data.Monoid hiding ((<>)) #endif
This package is inspired by the blogpost "Make macros mean something – readable backwards compatibility with CPP".
|Versions [faq]||0.1, 0.1.0.1|
|Dependencies||base (>=4.3 && <4.11) [details]|
|Author||Herbert Valerio Riedel|
|Revised||Revision 1 made by HerbertValerioRiedel at Sat May 13 08:39:39 UTC 2017|
|Source repo||head: git clone https://github.com/hvr/base-feature-macros.git|
|Uploaded||by HerbertValerioRiedel at Sat May 13 08:38:44 UTC 2017|
|Downloads||1208 total (75 in the last 30 days)|
|Rating||(no votes yet) [estimated by Bayesian average]|
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Last success reported on 2017-05-13 [all 2 reports]
- base-feature-macros-0.1.tar.gz [browse] (Cabal source package)
- Package description (revised from the package)
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