The applicative-numbers package

Any applicative functor can be given numeric instances in a boilerplate way. The applicative-numbers package provides an include file that makes it a snap to define these instances. See Data.Numeric.Function for an example.

Project wiki page: http://haskell.org/haskellwiki/applicative-numbers

Instances of Num classes for applicative functors. To be #include'd after defining APPLICATIVE as the applicative functor name and CONSTRAINTS as a list of constraints, which must carry its own trailing comma if non-empty. The APPLICATIVE symbol gets #undef'd at the end of the include file, so that multiple includes are convenient.

For instance,

#define INSTANCE_Ord
#define INSTANCE_Enum

#define APPLICATIVE Vec2
#include "ApplicativeNumeric-inc.hs"

#define APPLICATIVE Vec3
#include "ApplicativeNumeric-inc.hs"

#define APPLICATIVE Vec4
#include "ApplicativeNumeric-inc.hs"

You'll also have to import pure and liftA2 from Control.Applicative and specify the FlexibleContexts language extension (due to an implementation hack).

Some instances are generated only if a corresponding CPP symbol is defined: INSTANCE_Eq, INSTANCE_Ord, INSTANCE_Show, INSTANCE_Enum

Properties

Versions	0.0.0, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7, 0.0.8, 0.0.9, 0.1.2
Dependencies	base, wl-pprint
License	BSD3
Copyright	(c) 2009 by Conal Elliott
Author	Conal Elliott
Maintainer	conal@conal.net
Stability	experimental
Category	Data, Numerical
Home page	http://haskell.org/haskellwiki/applicative-numbers
Upload date	Mon Apr 27 01:29:20 UTC 2009
Uploaded by	ConalElliott
Built on	ghc-6.10, ghc-6.12

Modules

Data
- Numeric
  - Data.Numeric.Function

Downloads

applicative-numbers-0.0.6.tar.gz (Cabal source package)
package description (included in the package)