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This seems related to #3135. This is my minimal test case:
``` idris
[show2] Show Integer where
show i = "5"
f : ({s:_} -> Show s => s -> String) -> Integer -> String
f g t = g @{show2} t
```
Thi…
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Argonaut library has functions to deal with lot of builtin types including Maybe, though I cannot find an option for Identity.
identity combinator, besides making the library more logically complet…
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I was reading about profunctor-based lenses (specifically, http://oleg.fi/gists/posts/2017-03-31-compiling-lenses.html) and it pointed out that there's a method that could be added to `Strong`:
```…
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In the [paper, def. 3.34.](https://arxiv.org/abs/2001.07488) folds are described as optics for the action of foldable _functors_. However, there is no `Functor` superclass constraint on `Foldable` in …
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We all known that coq `-type-in-type` is inconsistent, in README the author says "we continue to keep track of universe levels in these files 'by hand'". Do we have an automated universe checker to ch…
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I'm trying to build `generic-lens` on nix with ghc 8.6.3 and I encounter the following issue during the test suite:
```
[...]
### Failure in: 2
test/Util.hs:10
test/Spec.hs:243:7: fieldALensMa…
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From `#bfpg`:
`peddie`:
> so lens and the new abstractions it provides are way, way more than just first-class records, but I'm not sure I've seen this articulated well for people who aren't alread…
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This is of course very theoretical - just wondering if you have seen this paper:
http://dmwit.com/papers/201107EL.pdf
As I understood, they are passing around just the difference list (or generally,…
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`Decidable` seems to be, at the very least, independent of `Divisible`, and there's a lot of evidence that suggests that it should actually be `Divisible`'s superclass, going backwards from `Applicati…
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What do we really want `Monad` for that we can't do with `ArrowChoice`?