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agda-mode on VS Code

Feedbacks, issues, and PRs all welcome!

LSP Features

  • Go to definition
  • Type information on hover

Installation

  1. Make sure that you have agda properly installed (check this in your terminal, type agda and see if it's on your machine).
  2. Open an Agda file and you should be able to load it by typing C-c C-l.

Commands

  • C-c stands for "press Ctrl and c at the same time"
  • When it comes to combos like C-c C-l, you can often slur them into "hold Ctrl while pressing c and then l"

Commands working with types (marked with the 🎚 emoji below) can have different levels of normalization. However, due to some technical limitations, we cannot prefix commands with C-u or C-u C-u like in Emacs. Instead, we replace the C-u C-c prefix with C-u and the C-u C-u C-c prefix with C-y.

Take infer type for example:

Level of normalization Keymap in VS Code Keymap in Emacs
"simplified" (default) C-c C-d C-c C-d
"instantiated" (without further normalisation) C-u C-d C-u C-c C-d
"normalized" (fully normalized) C-y C-d C-u C-u C-c C-d

Global commands

Command Keymap
load C-c C-l
compile C-x C-c
quit C-c C-q
quit and restart C-x C-r
toggle display of hidden arguments C-x C-h
show constraints C-c C-=
solve constraints 🎚 C-c C-s
show all goals C-c C-?
move to next goal (forward) C-c C-f
move to previous goal (backwards) C-c C-b
infer type 🎚 C-c C-d
module contents 🎚 C-c C-o
search definitions in scope 🎚 C-c C-z
compute normal form (default compute) C-c C-n
compute normal form (ignore abstract) C-u C-n
compute normal form (use show instance) C-y C-n
switch to a different Agda version C-x C-s

Commands in context of a goal

Command Keymap
give (fill goal) C-c C-SPC
refine C-c C-r
elaborate and give 🎚 C-c C-m
auto C-c C-a
case split C-y C-c
compute helper function type and copy 🎚 C-y C-h
goal type 🎚 C-c C-t
context (environment) 🎚 C-c C-e
infer type 🎚 C-c C-d
goal type and context 🎚 C-c C-,
goal type, context and inferred term 🎚 C-c C-.
goal type, context and checked term 🎚 C-c C-;
module contents 🎚 C-c C-o
compute normal form (default compute) C-c C-n
compute normal form (ignore abstract) C-u C-n
compute normal form (use show instance) C-y C-n
why in scope C-c C-w

Commands yet to be implemented

Command Keymap
abort a command C-x C-a
remove goals and highlighting C-x C-d
comment/uncomment rest of buffer

Unicode Input

Pretty much the same like on Emacs. Press backslash "\" and you should see a keyboard popping up in the panel, with key suggestions and symbol candidates. Use arrow keys to explore and navigate between the candidates (if there's any).

Unicode input also works in the input prompt, though it's a bit less powerful.

Troubleshooting

Agda files won't load, commands don't work

Please open the "Keyboard Shortcuts" tool (C-k + C-s) and see if any other extensions are fighting for the same key combinations.

Contributing

See CONTRIBUTING.md

Packages

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