Haskell is a purely functional programming language with declarative, statically-typed code. It’s a great tool to add to your toolbox for efficient applications that process a lot of data, and for that reason it can be particularly good for data manipulation. In general, it’s used in academia for research in programming languages as well as being a language that can be used to automate mathematical proof research; industry applications also exist.

Whether you’re just getting started with it or a seasoned vet, it’s always a good exercise to see how other developers are using the language with varying types of setups.

This article will go over a variety of Haskell IDE setups with internet opinions on each; hopefully by the end, you will have a better idea of the options out there to decide what the best IDE setup for you is.

VSCode

Code evaluation support. Open source via VSCode Haskell, GitHub

Haskell extension

• Warning, error diagnostics via GHC
• Type information on hover
• Type documentation on hover
• Jump to definition support
• Document symbols support
• Ability to highlight references in document
• Code completion
• Formatting with Brittany, Floskell, Ormolu or Stylish Haskell
• Multi-root workspace support
• Code evaluation with the Haskell Language Server
• “If you are using Visual Studio Code, the Haskell extension will automatically download and install haskell-language-server for you.” Haskell Language Server GitHub

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