typelevel-rewrite-rules
rewrite rules for type-level equalities (by gelisam)
ghc-proposals
Proposed compiler and language changes for GHC and GHC/Haskell (by Kleidukos)
Our great sponsors
typelevel-rewrite-rules | ghc-proposals | |
---|---|---|
4 | 3 | |
61 | 1 | |
- | - | |
3.0 | 2.5 | |
4 months ago | about 1 year ago | |
Haskell | Python | |
LicenseRef-PublicDomain | - |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
typelevel-rewrite-rules
Posts with mentions or reviews of typelevel-rewrite-rules.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2021-09-10.
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Comparing polymorphic function arguments with GHC
I encountered a similar issue in typelevel-rewrite-rules. The user writes type PlusAssoc a b c = ((a + b) + c) ~ (a + (b + c)) to indicate that they want a type like (2 + x) + 1 to be rewritten to 2 + (x + 1). Thus, I want to be able to look at (2 + x) + 1 and learn that yes, it matches the pattern (a + b) + c, with the substitution a = 2, b = x, c = 1.
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[ANN/RFC] constraint-rules
Nice! Thanks for including a comparison with my package typelevel-rewrite-rules. Since my package indeed struggles with infinite loops introduced by self-triggering rewrite rules, I would like to better understand why your package doesn't suffer from that same problem.
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Transpiling to GHC Core language
When writing a typechecker plugin, you can eliminate constraints from the user's program by providing an implementation of the corresponding dictionary. The way you provide that dictionary to ghc is by providing a core expression; for example, this evCast futureDict co expression has type EvTerm, whose first constructor takes an EvExpr, which is a synonym for CoreExpr.
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[GHC Proposals] GHC Maintainer preview
Until then, I guess we can simply poll. Here's a GitHub Action I wrote today which checks if the latest report for a given package includes a failure: https://github.com/gelisam/typelevel-rewrite-rules/blob/main/.github/workflows/check-hackage-matrix.yml
ghc-proposals
Posts with mentions or reviews of ghc-proposals.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-03-02.
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Monthly Hask Anything (March 2022)
*.*.1 releases are always like preview releases (see also this). 9.2.2 will be released soon, maybe even this week or next week.
- GHC Maintainer Preview Proposal
- [GHC Proposals] GHC Maintainer preview
What are some alternatives?
When comparing typelevel-rewrite-rules and ghc-proposals you can also consider the following projects:
funspection - Type-level function utilities
stackage - Stable Haskell package sets: vetted consistent packages from Hackage
uom-plugin - Units of measure as a GHC typechecker plugin
type-eq - Type equality evidence you can carry around
ghc-whole-program-compiler-project - GHC Whole Program Compiler and External STG IR tooling
IdrisExtSTGCodegen
constraint-rules - Extend GHC's type checker with user-defined rules, without writing a type checker plugin.
type-level-numbers - Implementation of type level natural and signed integer numbers in haskell using type families.
typelevel-rewrite-rules vs funspection
ghc-proposals vs stackage
typelevel-rewrite-rules vs uom-plugin
typelevel-rewrite-rules vs type-eq
typelevel-rewrite-rules vs ghc-whole-program-compiler-project
typelevel-rewrite-rules vs IdrisExtSTGCodegen
typelevel-rewrite-rules vs constraint-rules
typelevel-rewrite-rules vs type-level-numbers