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README.md

Hasky Extensions

This project is in “limited-maintenance” mode. I will not spend any of my time supporting it. You can still open PRs if you must, or you can take over if you wish. I'll mark the project as deprecated and stop supporting it altogether in some months.

License GPL 3 MELPA CircleCI

The package provides a way to add and remove Haskell language extensions easily from any place in a file without moving the point. This is done with the help of a menu where the most popular language extensions are assigned just one letter to toggle, while the others require two key strokes:

Hasky extensions

Naturally, when performing toggling of the extensions, they are kept sorted and aligned automatically for you.

Installation

Download this package and place it somewhere, so Emacs can see it. Then put (require 'hasky-extensions) into your configuration file. Done!

It's available via MELPA, so you can just M-x package-install RET hasky-extensions RET.

Usage

Just bind the hasky-extensions and hasky-extensions-browse-docs commands, for example:

(global-set-key (kbd "C-c y")     #'hasky-extensions)
(global-set-key (kbd "<next> h x" #'hasky-extensions-browse-docs))

When the menu shows up, type letters assigned to the language extension you wish to toggle. To exit the menu press C-g.

Customization

To view available customization options, type M-x customize-group RET hasky-extensions RET. Most important variables are:

  • hasky-extensions—list of all extensions to show in the menu.

  • haksy-extensions-docs—A collection of extensions with links to GHC user guide.

  • hasky-extensions-reach—how many characters from the beginning of file to scan. We cannot always scan entire files because they can be quite big, the default value, however, should be OK in 99.99% of cases.

  • hasky-extensions-sorting—whether to keep the collection of extensions sorted, default is t.

  • hasky-extensions-aligning—whether to keep closing braces of extension pragmas aligned, default is t.

  • hasky-extensions-prettifying-hook—the hook to run after prettifying the extension list. For example, you could run whitespace-cleanup there.

The package in powered by the avy-menu library, which implements this handy Avy-powered popup menu. To control appearance of the menu, use M-x customize-group avy-menu RET.

License

Copyright © 2016–2019 Mark Karpov

Distributed under GNU GPL, version 3.

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Toggle Haskell language extensions from Emacs

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