gadt

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Can I statically reject different instantiations of an existential type?

First attempt It\'s difficult to make this question pithy, but to provide a minimal example, suppose I have this type:[详细]

2023-04-08 09:36 分类：问答
Using GADT in exception handling

Here\'s my problem I\'m using Control.Exception.catch for my exception handling, which has the following type:[详细]

2023-04-05 11:44 分类：问答
Ambiguous type using parameterized types Haskell

I have a pretty straightforward function that takes a parameterized data type and returns the same type:[详细]

2023-04-02 09:49 分类：问答
type level integers in ocaml

Could anyone give me suggestions/advice on making type level integers in OCaml (3.12) supporting addition and subtraction operations on them?[详细]

2023-03-31 14:01 分类：问答
Defining your own Typeable instances for GADTs

Can someone point me at a good set of examples for defining Typeable or Typeable1 instances for GADTs in Haskell.[详细]

2023-03-23 14:44 分类：问答
Haskell -- bidirectional class instance type implications OR GADT existential type qualifications?

I have a GADT defined like (abbreviated), {-# LANGUAGE StandaloneDeriving #-} data D t where C :: t -> D t[详细]

2023-03-02 14:07 分类：问答
Polymorphism scenario in Haskell

I have written the following Haskell program to interpret basic math. I would like to add comparison and boolean operators in addition to mathematical operators. My question is how I should go about r[详细]

2023-02-28 18:44 分类：问答
Performance implications of using GADTs

When answering a question with a suggestion to use GADTs, some questions with regards to performance came up in the comments. The question involved a typeclass PlotValue:[详细]

2023-02-19 09:14 分类：问答
Runtime comparison of types for lifting polymorphic data structures into GADTs

Suppose we define a GADT for comparison of types: data EQT a b where Witness :: EQT a a Is it then possible to declare a function eqt with the following type signature:[详细]

2023-01-23 07:46 分类：问答
Material for Learning GADT

I started reading about GADT in Haskell Wiki but didn\'t feel quite comf开发者_Python百科ortable understanding it. Do you recommend a specific book chapter or a blog post explaining GADT for a Haskell[详细]

2023-01-22 11:46 分类：问答