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My collection of Haskell snippets for LuaSnip.
Powered by tree-sitter and LSP.

🦥

Quick Links

• Installation
• Quick Setup
• Snippets
• Recommendations
• Contributing

Installation

Use luarocks or your favourite plugin manager.

Required

• neovim >= 0.8
• luasnip

Optional

• haskell-language-server and haskell-tools.nvim (some snippets work better with LSP).
• A Haskell tree-sitter parser or nvim-treesitter and the parser for haskell.

Quick setup

Add the following to your LuaSnip setup.

local ls = require('luasnip')
ls.setup {
  -- Add your LuaSnip config
}
local haskell_snippets = require('haskell-snippets').all
ls.add_snippets('haskell', haskell_snippets, { key = 'haskell' })

Note

See also :h haskell-snippets

Snippets

Note

• The recording software ttyrec sometimes has some visual glitches.
• Many snippets provided by this plugin use choice nodes recursively.

Pragmas

haskell-snippets.pragmas.prag

• Trigger: prag

haskell-snippets.pragmas.lang

• Trigger: lang

haskell-snippets.pragmas.discover

• Trigger: discover

haskell-snippets.pragmas.nowarn

• Trigger: nowarn

Module and imports

haskell-snippets.module.mod

• Trigger: mod

haskell-snippets.module.qual

• Trigger: qual

haskell-snippets.module.impc

• Trigger: impc
• Requires a tree-sitter parser for Haskell.

haskell-snippets.module.qualc

• Trigger: qualc
• Requires a tree-sitter parser for Haskell.

Data and typeclasses

haskell-snippets.data.adt

• Trigger: adt

haskell-snippets.data.newtype

• Trigger: new

haskell-snippets.data.rec

• Trigger: rec

haskell-snippets.data.cls

• Trigger: cls

haskell-snippets.data.ins

• Trigger: ins

haskell-snippets.data.constraint

• Trigger: =>

Functions

haskell-snippets.functions.fn

• Trigger: fn

haskell-snippets.functions.func

• Trigger: func

haskell-snippets.functions.lambda

• Trigger: \

Expressions

haskell-snippets.expressions.if_expr

• Trigger: if

haskell-snippets.expressions.if_expr_multiline

• Trigger: iff

• Trigger: case

haskell-snippets.expressions.if_expr_multiway

• Trigger: ifmw

haskell-snippets.expressions.lambdacase

• Trigger: \case

QuasiQuotes

haskell-snippets.quasiquotes.qq

• Trigger: qq

haskell-snippets.quasiquotes.sql

• Trigger: sql

Contributing

All contributions are welcome! See CONTRIBUTING.md.

Recommendations

Here are some other plugins I recommend for Haskell development:

• mrcjkb/haskell-tools.nvim: Toolset to improve the Haskell experience in Neovim.
• neotest-haskell: Interact with tests in neovim.
• luc-tielen/telescope_hoogle: Hoogle search.