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#+TITLE: Agda layer
#+TAGS: general|layer|programming|pure
* Table of Contents :TOC_5_gh:noexport:
- [[#description][Description]]
- [[#features][Features:]]
- [[#install][Install]]
- [[#layer][Layer]]
- [[#agda][Agda]]
- [[#key-bindings][Key bindings]]
* Description
This layer adds support for the [[http://wiki.portal.chalmers.se/agda/pmwiki.php][Agda]] programming language.
** Features:
- Faces redefined to correctly play with themes.
- Spacemacs bindings to Agda's interactive tools.
*This layer is in construction, it needs your contributions and bug reports.*
* Install
** Layer
To use this configuration layer, add it to your =~/.spacemacs=. You will need to
add =agda= to the existing =dotspacemacs-configuration-layers= list in this
file.
** Agda
Quick instructions to install Agda assuming you have cabal installed:
#+BEGIN_SRC sh
cabal install alex happy "cpphs < 1.19" agda
#+END_SRC
Then check that =agda= is available on your =$PATH= and seen by Emacs. For
information about setting up =$PATH=, check out the corresponding section in the
FAQ (~SPC h SPC $PATH RET~).
By default the =agda-mode= executable bundled with most agda installations is
used to locate the agda-mode package. If you don't have it and want to use a
local agda-mode package, you can customize the layer variable =agda-mode-path=
to your needs. Set it to =nil= if =agda2.el= is already discoverable in Emacs'
load path, otherwise set it to the path at which =agda2.el= can be found. For
example,
#+BEGIN_SRC emacs-lisp
(agda :variables agda-mode-path "/some/path/to/agda2.el")
#+END_SRC
* Key bindings
The key bindings of this layer don't follow the Spacemacs conventions,
we opted to a simple transcription of stock Agda mode key bindings to
Spacemacs leader key.
All Agda specific bindings are prefixed with the major-mode leader
~SPC m~.
| Key binding | Description |
|-------------+-------------------------------------------------------------------------------------------------------------------------------------------|
| ~SPC m =~ | Show constraints. |
| ~SPC m ?~ | Show all goals. |
| ~SPC m ,~ | Shows the type of the goal at point and the currect context. |
| ~SPC m .~ | Shows the context, the goal and the given expression's inferred type. |
| ~SPC m a~ | Simple proof search. |
| ~SPC m b~ | Go to the previous goal, if any and activate goal-navigation transient-state. |
| ~SPC m c~ | Refine the pattern variables given in the goal. |
| ~SPC m d~ | Infers the type of the given expression. |
| ~SPC m e~ | Show the context of the goal at point. |
| ~SPC m f~ | Go to the next goal, if any and activate goal-navigation transient-state. |
| ~SPC m h~ | Compute the type of a hypothetical helper function. |
| ~SPC m l~ | Load current buffer. |
| ~SPC m n~ | Computes the normal form of the given expression, using the scope of the current goal or, if point is not in a goal, the top-level scope. |
| ~SPC m p~ | Shows all the top-level names in the given module. |
| ~SPC m r~ | Refine the goal at point. |
| ~SPC m s~ | Solves all goals that are already instantiated internally. |
| ~SPC m t~ | Show the type of the goal at point. |
| ~SPC m x c~ | Compile current module. |
| ~SPC m x d~ | Removes buffer annotations (overlays and text properties). |
| ~SPC m x h~ | Toggle display of implicit arguments. |
| ~SPC m x q~ | Quit and clean up after agda2. |
| ~SPC m x r~ | Kill and restart the *agda2* buffer and load =agda2-toplevel-module=. |
| ~SPC m w~ | Explains why a given name is in scope. |