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Why does this usage of quantified constraints fail to compile:

score 67 · Answer 1 · 2023-08-16T01:53:07.810000

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Why does this usage of quantified constraints fail to compile:

67 views Asked by Clinton At 16 August 2023 at 01:53

score 108 · Answer 2 · 2022-06-19T00:48:17.987000

Function as trait with output type polymorphic in lifetime

108 views Asked by David Spies At 19 June 2022 at 00:48

score 86 · Answer 3 · 2022-01-25T17:37:23.333000

Instance inductivity as constraint

86 views Asked by Ryba At 25 January 2022 at 17:37

score 103 · Answer 4 · 2021-11-23T22:07:44.127000

How can I use a Constraint Family that's in scope to prove instances within the body of an expression?

103 views Asked by Josh.F At 23 November 2021 at 22:07

score 118 · Answer 5 · 2021-11-23T04:27:35.053000

How can I derive typeclass instances from constraint families that are in scope?

118 views Asked by Josh.F At 23 November 2021 at 04:27

score 141 · Answer 6 · 2021-10-11T16:49:47.723000

Quantified Constraints for Higher-kinded Typeclasses

141 views Asked by w41g87 At 11 October 2021 at 16:49

score 135 · Answer 7 · 2021-08-27T15:51:07.490000

Change in Behaviour of Quantified Constraints in GHC 9

135 views Asked by oisdk At 27 August 2021 at 15:51

score 211 · Answer 8 · 2020-07-20T08:40:42.600000

Can adding a constraint cause other constraints to go out of scope?

211 views Asked by Asad Saeeduddin At 20 July 2020 at 08:40

score 124 · Answer 9 · 2020-07-20T06:02:02.230000

Interaction between associated type families and quantified constraints

124 views Asked by Asad Saeeduddin At 20 July 2020 at 06:02

score 88 · Answer 10 · 2020-07-15T12:31:43.293000

Quantified type equality of associated type families

88 views Asked by Greg C At 15 July 2020 at 12:31

score 91 · Answer 11 · 2020-06-20T20:29:08.300000

Letting a distributed DSL implementation choose its serialization format (via constraint family)

91 views Asked by æons At 20 June 2020 at 20:29

score 273 · Answer 12 · 2020-01-14T23:20:32.437000

Derive Ord with Quantified Constraints (forall a. Ord a => Ord (f a))

273 views Asked by William Rusnack At 14 January 2020 at 23:20

score 181 · Answer 13 · 2019-06-13T04:36:26.717000

Why is using QuantifiedConstraints to specify a subclass of a typeclass also demanding an instance of the subclass?

181 views Asked by rampion At 13 June 2019 at 04:36

score 481 · Answer 14 · 2019-06-06T03:38:25.777000

Quantified constraints vs. (closed) type families

481 views Asked by Cactus At 06 June 2019 at 03:38

score 96 · Answer 15 · 2018-12-27T18:33:01.407000

How to give GHC a hint for constructing QuantifiedConstraints?

96 views Asked by dspyz At 27 December 2018 at 18:33

score 381 · Answer 16 · 2011-11-10T06:30:15.277000

haskell -- rank n constraints? (or, monad transformers and Data.Suitable)

381 views Asked by gatoatigrado At 10 November 2011 at 06:30

TechQA.

List Question

Why does this usage of quantified constraints fail to compile:

Function as trait with output type polymorphic in lifetime

Instance inductivity as constraint

How can I use a Constraint Family that's in scope to prove instances within the body of an expression?

How can I derive typeclass instances from constraint families that are in scope?

Quantified Constraints for Higher-kinded Typeclasses

Change in Behaviour of Quantified Constraints in GHC 9

Can adding a constraint cause other constraints to go out of scope?

Interaction between associated type families and quantified constraints

Quantified type equality of associated type families

Letting a distributed DSL implementation choose its serialization format (via constraint family)

Derive Ord with Quantified Constraints (forall a. Ord a => Ord (f a))

Why is using QuantifiedConstraints to specify a subclass of a typeclass also demanding an instance of the subclass?

Quantified constraints vs. (closed) type families

How to give GHC a hint for constructing QuantifiedConstraints?

haskell -- rank n constraints? (or, monad transformers and Data.Suitable)

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