The applicative-numbers package

[Tags: bsd3, library]

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.

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Copyright 2009-2013 Conal Elliott; BSD3 license.

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


Versions0.0.0, 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, 0.1.3
Change logNone available
Dependenciesbase (<5) [details]
Copyright(c) 2009-2011 by Conal Elliott
AuthorConal Elliott
CategoryData, Numerical
Home page
UploadedWed Apr 9 02:40:18 UTC 2014 by ConalElliott
Downloads2925 total (32 in last 30 days)
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StatusDocs available [build log]
Successful builds reported [all 1 reports]




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