flexible-defaults: Generate default function implementations for complex type classes.
Template Haskell code to implement default implementations for type-class functions based on which functions are already implemented. Currently extremely crude but still fairly effective.
When defining a type class with many functions, each of which can be implemented based on arbitrary subsets of the others, the standard default-implementation concept breaks down quite badly. This library provides a system by which more complex rules can be described for choosing default implementations based on which ones the user supplies. These implementations can additionally be given "suitability scores", so that when multiple possible choices could be made, the library can choose the "best" one.
Changes in v0.0.0.2: Nothing at all except setting 'buildable: False' under GHC 7.2.1. Technically it builds on 7.2.1, but it doesn't actually generate correct code due to http://hackage.haskell.org/trac/ghc/ticket/5410 which has been patched and will almost certainly be fixed in the next GHC release. AFAIK 7.2.1 is the only release where this bug actually caused problems. I'm sure it could be worked around, but it's a whole lot easier to just say "wait for 7.2.2/7.4". If anyone desperately needs this package under 7.2.1, let me know and I'll see what I can do.
|Versions [RSS] [faq]||0.0.0.1, 0.0.0.2, 0.0.0.3, 0.0.1.0, 0.0.1.1, 0.0.1.2, 0.0.2, 0.0.3|
|Dependencies||base (>=3 && <4.6), containers, template-haskell, transformers [details]|
|Author||James Cook <firstname.lastname@example.org>|
|Maintainer||James Cook <email@example.com>|
|Revised||Revision 1 made by PeterSimons at 2019-10-27T15:15:47Z|
|Category||Code Generation, Template Haskell|
|Source repo||head: git clone https://github.com/mokus0/flexible-defaults.git|
|Uploaded||by JamesCook at 2011-08-15T14:21:11Z|
|Distributions||Arch:0.0.3, Debian:0.0.2, LTSHaskell:0.0.3, NixOS:0.0.3, Stackage:0.0.3|
|Downloads||12697 total (77 in the last 30 days)|
|Rating||(no votes yet) [estimated by Bayesian average]|
Docs uploaded by user
Build status unknown [no reports yet]
- flexible-defaults-0.0.0.2.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'.