squealgen
ghc
squealgen | ghc | |
---|---|---|
3 | 95 | |
25 | 2,975 | |
- | 0.6% | |
0.0 | 9.7 | |
almost 3 years ago | 2 days ago | |
Haskell | Haskell | |
BSD 3-clause "New" or "Revised" License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
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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.
squealgen
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What's your favorite Database EDSL/library in Haskell?
https://github.com/morphismtech/squeal, because, to my knowledge, it's the only option that both maintains deep type safety without losing the expressive power of SQL. It can even typecheck your database migrations. There's even a tool to generate the types of your schema based on an existing database: https://github.com/mwotton/squealgen
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How can type inference represent calculation?
Indeed, this is exactly what squeal does. You define (or generate from your schema) a type-level description of your tables, including whether each column can be null or not, and squeal type-checks your SQL queries, including checking whether those fields should be wrapped in a Maybe or not. In the linked documentation, note how the user_id and email fields are defined:
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How to dynamically create types?
If the DB is Postgres, then this is actually probably a good usecase for Squeal, along with squealgen. It has a bit of a learning curve, but what you get is the ability to read an existing DB and generate a type-level schema from it automatically, which can then be used for completely type-safe queries. It also supports type-level migrations.
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?
postgrest - REST API for any Postgres database
polysemy - :gemini: higher-order, no-boilerplate monads
rel8 - Hey! Hey! Can u rel8?
in-other-words - A higher-order effect system where the sky's the limit
opaleye
effect-zoo - Comparing Haskell effect systems for ergonomics and speed
squeal-postgresql - Squeal, a deep embedding of SQL in Haskell
vim-multiple-cursors - True Sublime Text style multiple selections for Vim
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
xvm - Ecstasy and XVM