show-combinators: Combinators to write Show instances
Downloads
- show-combinators-0.2.0.0.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'.
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
- No Candidates
| Versions [RSS] | 0.1.0.0, 0.1.1.0, 0.2.0.0 |
|---|---|
| Change log | CHANGELOG.md |
| Dependencies | base (>=4.8 && <5) [details] |
| Tested with | ghc ==7.10.3, ghc ==8.0.2, ghc ==8.2.2, ghc ==8.4.4, ghc ==8.6.5, ghc ==8.8.1 |
| License | MIT |
| Copyright | 2018 Li-yao Xia |
| Author | Li-yao Xia |
| Maintainer | lysxia@gmail.com |
| Revised | Revision 2 made by lyxia at 2021-02-16T14:35:40Z |
| Category | Text |
| Home page | https://github.com/Lysxia/show-combinators#readme |
| Source repo | head: git clone https://github.com/Lysxia/show-combinators |
| Uploaded | by lyxia at 2020-03-22T21:10:10Z |
| Distributions | Arch:0.2.0.0, Debian:0.2.0.0, LTSHaskell:0.2.0.0, NixOS:0.2.0.0, Stackage:0.2.0.0 |
| Reverse Dependencies | 6 direct, 262 indirect [details] |
| Downloads | 16127 total (6 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs available [build log] Last success reported on 2020-03-22 [all 1 reports] |
Readme for show-combinators-0.2.0.0
[back to package description]Show combinators 
A minimal set of convenient combinators to write Show instances.
data MyType a
= C a a -- a regular constructor
| a :+: a -- an infix constructor
| R { f1 :: a, f2 :: a } -- a record
infixl 4 :+:
instance Show a => Show (MyType a) where
showsPrec = flip precShows where
precShows (C a b) = showCon "C" @| a @| b
precShows (c :+: d) = showInfix ":+:" 4 c d
precShows (R {f1 = e, f2 = f}) =
showRecord "R" ("f1" .=. e &| "f2" .=. f)