# \[ANN\] Release of Gopcaml-mode (0.0.2) - Unicode & Compatibility Update

**URL:** <https://discuss.ocaml.org/t/ann-release-of-gopcaml-mode-0-0-2-unicode-compatibility-update/7425>\
**Category:** Community\
**Tags:** emacs, ide\
**Created:** [March 8, 2021, 10:06am UTC](https://discuss.ocaml.org/t/ann-release-of-gopcaml-mode-0-0-2-unicode-compatibility-update/7425 "2021-03-08T10:06:45Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Gopiandcode](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/gopiandcode/32/5346_2.png) [@Gopiandcode](https://discuss.ocaml.org/u/Gopiandcode)\
**Post date:** [March 8, 2021, 10:06am UTC](https://discuss.ocaml.org/t/ann-release-of-gopcaml-mode-0-0-2-unicode-compatibility-update/7425/1 "2021-03-08T10:06:45Z")

</div>

Hi all, In accordance with my (totally not ad-hoc) annual release strategy, I am pleased to announce the latest release of Gopcaml-mode - an Emacs plugin for structural editing of OCaml code - this version comes with a host of new features, as well as a wider support of OCaml versions (4.08 to 4.12.0).

If you haven’t heard of Gopcaml-mode before, or aren’t sold on the idea, here’s a quick peek at what you can do with the _power of semantic structural editing_:

 ![gopcaml_editing_with_style](https://us1.discourse-cdn.com/flex020/uploads/ocaml/original/2X/3/33f2b59f817306c4b0a7eab32f207f6ba441717e.gif)

Pay attention to how the cursor moves - each one of these jumps is done by expressing a semantic movement (_i.e_, things like - move to pattern `C-c C-p` to jump to the nearest enclosing wildcard pattern, or move to nearest let-def `C-c C-o` to jump to the nearest let binding, etc.).

I’d recommend checking out the [release post](https://discuss.ocaml.org/t/introducing-gopcaml-mode-structural-ocaml-editing/5310) for version 0.0.1 for a wider selection of examples of what exactly Gopcaml-mode can do, and how you can install it.

## More Pretty Pictures

- _new!_ **Proper support for inter-pattern movement and jump to wildcard** (see above gif)
- _new!_ **Full OCaml Syntax Support for movements**  
 ![gopcaml_full_syntax_support](https://us1.discourse-cdn.com/flex020/uploads/ocaml/original/2X/a/abc1ff0b5dbbefe2beb150f2c09148cb5472ece2.gif)
- _new!_ **Compatibility with buffers with accents**  
 ![gopcaml_buffers_with_accents](https://us1.discourse-cdn.com/flex020/uploads/ocaml/original/2X/c/c56610af123649677d12897ef692f80adde1e372.gif)

## Detailed Changelog

- _Updated to work with OCaml 4.12.0_
  - Updated to depend on ocaml-migrate-parsetree, back-porting support back to OCaml.4.08.0+

- _Improved support for jumping to nearest pattern_
  - Pressing C-c C-p will now jump to the nearest enclosing wildcard or pattern if no wildcard exists
  - C-c C-o operates as normal for jumping to the nearest let definition

- _Added support for moving within patterns_
- _Added support for moving within types_
- _improved quality of main Ast\_zipper code_
  - more comments
  - refactoring TextRegion module to a separate file so it may be reused for other analyses

- _Added support for excluding files_
  - Now does not complain when opening ocamllex or menhir files
  - see `gopcaml-ignored-extensions` variable for more information

- _Fixed ordering of parameters when using optional arguments_
  - previously optional arguments would appear before their bindings

- _Added better support for multi-byte strings_
  - previously, use of multi-byte strings would cause overlays to  
desynchronise with the code
  - the OCaml parser represents offsets and ranges in terms of byte offsets, while the conversion functions being used in the program (Position.of\_int\_exn) assumed they were code points
  - the existing code would function correctly on buffers using only single-byte characters, but would fail on buffers with multi-byte buffers
  - now our unicode using foriegn-language friends can too enjoy the power of Gopcaml mode!

- _Fixed bug with transpose expression_

## Get Gopcaml-mode

Its as easy as 1, 2, 3!

1. Install from opam:

```auto
opam install gopcaml-mode

```

1. Compile your emacs with support for dynamic modules

2. Load gopcaml-mode in your init.el:

```auto
 (let ((opam-share (ignore-errors (car (process-lines "opam" "config" "var" "share")))))
	   (when (and opam-share (file-directory-p opam-share))
	     ;; Register Gopcaml mode
	     (add-to-list 'load-path (expand-file-name "emacs/site-lisp" opam-share))
         (autoload 'gopcaml-mode "gopcaml-mode" nil t nil)
         (autoload 'tuareg-mode "tuareg" nil t nil)
         (autoload 'merlin-mode "merlin" "Merlin mode" t)
	     ;; Automatically start it in OCaml buffers
	     (setq auto-mode-alist
		   (append '(("\\.ml[ily]?$" . gopcaml-mode)
			     ("\\.topml$" . gopcaml-mode))
			   auto-mode-alist))
	     ))

```

See the [release post](https://discuss.ocaml.org/t/introducing-gopcaml-mode-structural-ocaml-editing/5310) for version 0.0.1 for detailed instructions on how you can install it.

## Contribute

- Github: [GitHub - Gopiandcode/gopcaml-mode: [MIRROR] Ultimate Ocaml Editing Mode](https://github.com/Gopiandcode/gopcaml-mode)
- Gitlab: [Kiran Gopinathan / gopcaml-mode · GitLab](https://gitlab.com/gopiandcode/gopcaml-mode)