Changed description from

This provides a set of feature macros describing features of @base@ in a semantic way.

See <src/base-feature-macros.h 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
<https://github.com/quchen/articles/blob/master/haskell-cpp-compatibility.md "Make macros mean something – readable backwards compatibility with CPP">.

This provides a set of feature macros describing features of @base@ in a semantic way.

See <base-feature-macros/src/base-feature-macros.h 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
<https://github.com/quchen/articles/blob/master/haskell-cpp-compatibility.md "Make macros mean something – readable backwards compatibility with CPP">.