error-messages
ghc
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error-messages | ghc | |
---|---|---|
18 | 95 | |
73 | 2,968 | |
- | 0.8% | |
0.0 | 9.7 | |
almost 2 years ago | 3 days ago | |
Haskell | Haskell | |
- | GNU General Public License v3.0 or later |
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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.
error-messages
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Why did GHC go from "occurs check failed" to talking about rigid type variables?
The GHC issue tracker or the error message improvement repo are two such places to get clarification (and potentially improve the message even if it turns out to be technically correct).
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Please help!
Indeed there is a ticket and the error message is somewhat better in 9.4 although it still doesn't mention the guard.
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What prevents Haskell from having good error messages?
Note that the Num literal issue is tracked here and there seems to be a good suggestion to fix it: https://github.com/haskell/error-messages/issues/5#issuecomment-1040788806
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GHC: could not deduce [instance]
I think it would be great to post this over at https://github.com/haskell/error-messages too so that we can track it more easily than here on Reddit.
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How to get better compiler error messages?
Also, reminder that https://github.com/haskell/error-messages exists to track these kind of issues. Feel free to open an issue there.
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Unable to get this to compile
If you are able to articulate what aspects of the error messages you find hard to understand, please do open an issue on https://github.com/haskell/error-messages. (Or reply here then I can open an issue for you if you don't have a github account.) It doesn't have to be a concrete suggestion for improvement, even just knowing which messages are bad can be useful.
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Another Confusing Haskell Error Message
Do you know about https://github.com/haskell/error-messages
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Was simplified subsumption worth it for industry Haskell programmers?
The error message is at the least very unhelpful. Please report it on https://github.com/haskell/error-messages/issues/new
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How do I specify the type inside function definition?
Please do open an issue at https://github.com/haskell/error-messages. The issue itself can be as simple as just summarizing what you wrote here, it doesn't have to immediately suggest a good alternative. That issue tracker is in the first place intended to document all error messages that Haskellers struggle with.
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Haskell Error Messages: Come on!
Do check out https://github.com/haskell/error-messages. We have a related discussion here: https://github.com/haskell/error-messages/issues/5, but I think perhaps a separate issue for this case would be good to have.
ghc
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Veryl: A Modern Hardware Description Language
of course it does! what else would you call something like chicken scheme [https://call-cc.org/], ats [https://ats-lang.sourceforge.net/], or ghc [https://www.haskell.org/ghc/]? they are not "scripts", they are full-blown compilers that happen to use C as their compilation target, and then leverage C compilers to generate code for a variety of architecures. it's a very sensible way to do things.
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XL: An Extensible Programming Language
Agree about Haskell... as far as I'm aware there is actually no declarative/easily-readable definition of the Haskell syntax that is also complete, especially when it comes to the indentation rules, and the syntax is basically defined by the very (ironically) imperatively-defined GHC parser[0].
I prefer a syntax like in Pure[1], where the ambiguous, hard to parse indentation-based syntax is replaced by explicit semicolons (Yeah, you can use braces/semicolons in Haskell as well, but most code doesn't).
[0] https://github.com/ghc/ghc/blob/master/compiler/GHC/Parser/L...
[1] https://agraef.github.io/pure-lang/
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Revisiting Haskell after 10 years
GHC, the main Haskell compiler
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Beginner question -- best way to implement this in Haskell?
GHCi, version 9.6.3: https://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /Users/daniel/.ghci ghci> :{ | split :: Float -> [Int] | split value = map(read . (:[])) . show | :} :3:15: error: [GHC-83865] • Couldn't match expected type: [Int] with actual type: a0 -> [b0] • Probable cause: ‘(.)’ is applied to too few arguments In the expression: map (read . (: [])) . show In an equation for ‘split’: split value = map (read . (: [])) . show
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GHC 9.8.1 has been released
GHC is hosted on Gitlab, the Github repo is just a mirror. So money.
https://github.com/ghc/ghc
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Um rápido Hello World com Haskell
☁ ~ ghci GHCi, version 9.4.7: https://www.haskell.org/ghc/ :? for help ghci> 6 + 3^2 * 4 42
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Introducing NeoHaskell: A beacon of joy in a greyed tech world
Depending on who you ask, a programming language can be different things. If you ask the Haskell community, many will tell you that the language is the Haskell specification, and that what currently is being used is not Haskell itself, but an extension of Haskell that is supported by the GHC compiler. Similar to the C language, a programming language would be a specification.
- Exploring the Internals of Linux v0.01
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type derivation
GHCi, version 9.4.2: https://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from ~/.dotfiles/ghc/.ghc/ghci.conf
- Why did GHC go from "occurs check failed" to talking about rigid type variables?
What are some alternatives?
tech-proposals - The Haskell Foundation Tech Proposal Process
polysemy - :gemini: higher-order, no-boilerplate monads
error-message-index - A community-driven collection of documentation for Haskell error messages and warnings
in-other-words - A higher-order effect system where the sky's the limit
ghc-proposals - Proposed compiler and language changes for GHC and GHC/Haskell
vim-multiple-cursors - True Sublime Text style multiple selections for Vim
pool-conduit - Persistence interface for Haskell allowing multiple storage methods.
effect-zoo - Comparing Haskell effect systems for ergonomics and speed
hlint - Haskell source code suggestions
seed7 - Source code of Seed7
frp-zoo - Comparing many FRP implementations by reimplementing the same toy app in each.
fused-effects - A fast, flexible, fused effect system for Haskell