Issues · Glasgow Haskell Compiler / GHC · GitLab

[Discussion] Integrating DataTypeable, Functor, Foldable, Traversable, Generic and Lift in the `stock` deriving strategy

#19707 · opened Apr 15, 2021 by Hécate Moonlight Plow Tfeature request deriving
- 1
- 7
updated Apr 16, 2021
Don't suggest turning on `DeriveAnyClass` when an instance cannot be derived

#19692 · opened Apr 13, 2021 by syd@cs-syd.eu Pnormal Tfeature request deriving
- 2
- 1
updated Apr 15, 2021
(Derived) Ord instances generate terrible code

#19445 · opened Feb 26, 2021 by Sebastian Graf Tbug compiler perf deriving pointer tagging
- 0
updated Apr 02, 2021
Support overriding "No instance" errors using the default deriving strategy

#19418 · opened Feb 22, 2021 by infinity0 Tfeature request deriving
- 0
updated Mar 02, 2021
DerivingVia: incorrectly accepts deriving via types with differing runtime representations

#19079 · opened Dec 16, 2020 by Zachary Churchill DerivingVia Pnormal Tbug deriving documentation newcomer
- 4
updated Dec 20, 2020
Deriving multiple classes in standalone (or document this limitation)

#18874 · opened Oct 22, 2020 by Julien Debon Tfeature request deriving
- 1
- 1
updated Nov 08, 2020
Relax inferred context simplification to allow "exotic" contexts for GeneralizedNewtypeDeriving and DerivingVia instances.

#18219 · opened May 22, 2020 by Andrew Pritchard DerivingVia Tfeature request deriving
- 0
updated May 24, 2020
GND generates code that instantiates coerce too much

#18213 · opened May 21, 2020 by Ryan Scott QuantifiedConstraints deriving
- 1
- 5
updated Oct 31, 2020
ConstrainedClassMethods can trigger un-actionable redundant constraint warnings together with GND

#18148 · opened May 06, 2020 by Koz Ross Pnormal Tbug deriving error messages roles
- 18
updated May 22, 2020
DeriveGeneric gets a wrong infix constructor associativity when type is declared in a different module

#18101 · opened Apr 26, 2020 by Xia Li-yao Pnormal Tbug deriving generics incorrect runtime result
- 0
updated May 10, 2020
Can't derive TYPE rep instances

#17518 · opened Nov 26, 2019 by Icelandjack Tbug deriving documentation
- 3
updated Nov 28, 2019
GeneralizedNewtypeDeriving should not require that constructor be in scope

#17328 · opened Oct 09, 2019 by Richard Eisenberg deriving typechecker
- 9
updated Jul 03, 2020
Replace useages of con2tag_* in the deriving code with data2tag#

#17241 · opened Sep 24, 2019 by Andreas Klebinger 8.10.2 Tfeature request deriving
- 4
updated Feb 09, 2021
-XDerivingVia (and deriving strategies) is under specified in the manual

#17183 · opened Sep 12, 2019 by Richard Eisenberg DerivingVia Tbug deriving documentation
- 0
updated Sep 12, 2019
Stock deriving improvements

#17037 · opened Aug 07, 2019 by Sophie Taylor Pnormal Tfeature request deriving rules runtime perf
- 0
updated Jan 23, 2020
GHC accepts DerivingVia-generated instances that violate functional dependencies

#17013 · opened Jul 31, 2019 by Alexis King FunctionalDependencies Pnormal deriving
- 4
updated Aug 01, 2019
Generic1 deriving should use more coercions

#15969 · opened Nov 29, 2018 by David Feuer 5 Pnormal Tbug Trac import deriving generics runtime perf
- 4
updated Jan 23, 2020
Standard deriving should be less conservative when `UndecidableInstances` is enabled

#15868 · opened Nov 07, 2018 by edsko@edsko.net 5 Pnormal Tfeature request Trac import deriving
- 6
updated Jul 22, 2019
Add (or document if already exist) ability to derive custom typeclasses via source plugins

#15650 · opened Sep 17, 2018 by Dmitrii Kovanikov 8.6.1 5 Pnormal Tfeature request Trac import deriving plugins
- 1
- 10
updated Jul 19, 2019
DerivingVia (and perhaps even GND) works badly with DeriveGeneric

#15434 · opened Jul 24, 2018 by Hiromi Ishii 9.2.1 5 Pnormal Tbug Trac import deriving
- 6
updated Jan 23, 2021

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