How to develop CRuby

easily with Vim

Tatsuhiro Ujihisa

2017-09-19

RubyKaigi 2017 (Lightning talk)

https://gist.github.com/ujihisa/7a429f43033945e19444f38964b71e75

Target audience

• People new to contribute to CRuby
• but not necessarily familiar with C
• Vim users

CRuby + Vim

Q & A

CRuby development support

• Emacs
• misc/*.el (8 files)
• doc/contributing.rdoc
• "Indent 4 spaces for C with tabs for eight-space indentation (emacs default)"
• Vim
• Not really
• ( https://github.com/mrkn/vim-cruby )

CRuby writing basics

• Indentation
• :set cindent (default)
• :set tabstop=8 (default)
• :set noexpandtab (default)
• :set shiftwidth=4 (not default; it was 8)
• :set softtabstop=4 (not default; it was 0)
• Don't write ^ directly in your ~/.vimrc
• `:set` depends on the option type
• cindent, tabstop, shiftwidth, and softtabstop are `local to buffer`
• Or
• just install mrkn/vim-cruby and :set filetype=cruby

Jump from Ruby to C

• Nontrivial
• Method#source_location is only for Ruby
• 1.method(:to_s).source_location #=> nil
• Solution: create index (semi-manually)

Jump from Ruby to C

ruby-doc.org can

show (but how?)

Jump from Ruby to C

ruby-doc.org can

show (but how?)

Q. I want to see YARV ISeq quickly

Q. I want to see YARV ISeq quickly

Q. I want to see YARV ISeq quickly

"Most RubyKaigi speakers tend to see RubyVM::Iseq pretty frequently" - @joker1007

https://twitter.com/joker1007/status/910007895470698497

Q. I want to see YARV ISeq quickly

quicklearn.vim https://github.com/ujihisa/quicklearn

• general purpose just-in-time iseq/bytecode viewer for Vim

Q. Who are you?

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

Range

​

xs[3..5]

​

​

case i

when 4..8

wow

end

​

[1, 2..3, 4]

{3..5 => 'yo'}

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

Vancouver, BC, Canada

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

VimConf

​

Annual international Vim Conference

​

​

VimConf 2017

• Tokyo, Japan
• 2017-11-04

​

​

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

Asakusa, Tokyo, Japan

Since 2016-10

Asakusa, Tokyo, Japan

Since 2016-10

Tatsuhiro Ujihisa

• Favourite Ruby features
• Continuation
• M17N
• Range as an (immutable) object
• Ruby: 11 years ago, Vim: 20 years ago
• Vancouver, Canada�Tokyo, Japan
• Recent focus: fish
• VimConf co-organizer http://vimconf.vim-jp.org/2017/
• Fablic, inc since 2017-01

https://fablic.co.jp/

https://fablic.co.jp/

We support Rubyists

• ebisu.rb
• fablic.vim
• vital.vim committers meeting
• VimConf sponsor

Links

• mario.vim https://github.com/rbtnn/mario.vim
• vim-game-code-break https://github.com/johngrib/vim-game-code-break
• presentation tool: https://github.com/thinca/vim-showtime

​

My past Ruby talks

• This year
• Oedo RubyKaigi 06 https://ujihisa.wordpress.com/2017/03/21/oedo-rubykaigi-06/
• Tokyu RubyKaigi 11 https://tokyurubykaigi.github.io/tokyu11/ "Vim"
• In the past
• RubyConf 2009 "Hacking parse.y"
• RubyKaigi 2008, and RubyKaigi 2009 (well, both are about Vim)