derive-lifted-instances: Derive class instances though various kinds of lifting
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- derive-lifted-instances-0.3.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
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| Versions [RSS] | 0, 0.1, 0.1.1, 0.2, 0.2.1, 0.2.2, 0.3 |
|---|---|
| Change log | CHANGELOG.md |
| Dependencies | base (>=4.18 && <4.23), bifunctors (>=5.5.7 && <6), reflection (>=2.1 && <3), template-haskell (>=2.20 && <2.25) [details] |
| Tested with | ghc ==9.6.7, ghc ==9.8.4, ghc ==9.10.3, ghc ==9.12.2, ghc ==9.14.1 |
| License | Apache-2.0 |
| Author | Sjoerd Visscher |
| Maintainer | sjoerd@w3future.com |
| Category | Data, Generics, Development |
| Home page | https://github.com/sjoerdvisscher/derive-lifted-instances |
| Bug tracker | https://github.com/sjoerdvisscher/derive-lifted-instances/issues |
| Source repo | head: git clone https://github.com/sjoerdvisscher/derive-lifted-instances |
| Uploaded | by SjoerdVisscher at 2026-01-05T16:04:49Z |
| Distributions | |
| Reverse Dependencies | 1 direct, 1 indirect [details] |
| Downloads | 1724 total (15 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs available [build log] Last success reported on 2026-01-05 [all 1 reports] |
Readme for derive-lifted-instances-0.3
[back to package description]derive-lifted-instances
derive-lifted-instances generates type class instances using Template Haskell.
Below is an overview of what this library can do. If you could rewrite a class as one of the cases, and the listed constraints are satisfiable, then an instance can be derived. Note that when another instance of the class is required, this could also be a derived instance (i.e. deriving is composable), in case you don't want that instance to actually exist.
class C x where alg :: f x -> x |
|
|---|---|
x iso y |
(Functor f, C y) |
x=m |
(Foldable f, Monoid m) |
x=t a |
(Traversable f, Applicative t, C a) |
x=t a b |
(Traversable f, Biapplicative t, C a, C b) |
x a record |
(Traversable f, All C flds) |
class C x where coalg :: x -> f x |
|
|---|---|
x iso y |
(Functor f, C y) |
x=m |
(Pointed f) |
x=t a |
(Applicative f, Traversable t, C a) |
x=t a b |
(Applicative f, Bitraversable t, C a, C b) |
x a record |
(Applicative f, All C flds) |
class C x where dialg :: f x -> g x |
|
|---|---|
x iso y |
(Functor f, Functor g, C y) |
x=m |
(Foldable f, Pointed g, Monoid m) |
x=t a |
(Traversable f, Applicative g, Applicative t, Traversable t, C a) |
x=t a b |
(Traversable f, Applicative g, Biapplicative t, Bitraversable t, C a, C b) |
x a record |
(Traversable f, Applicative g, All C flds) |