[#54738] [ruby-trunk - Bug #8358][Open] TestSprintf#test_float test failuer on mingw32 — "phasis68 (Heesob Park)" <phasis@...>

36 messages 2013/05/02

[#54749] [ruby-trunk - Feature #8361][Open] Alternative syntax for block parameter — "alexeymuranov (Alexey Muranov)" <redmine@...>

12 messages 2013/05/02

[#54798] [ruby-trunk - Bug #8370][Open] Constants MAX_MULTIPART_LENGTH in cgi\core.rb — "xibbar (Takeyuki FUJIOKA)" <xibbar@...>

17 messages 2013/05/05

[#54850] [ruby-trunk - Feature #8377][Open] Deprecate :: for method calls in 2.1 — "charliesome (Charlie Somerville)" <charliesome@...>

27 messages 2013/05/07

[#54881] [ruby-trunk - Bug #8384][Open] Cannot build ruby against OpenSSL build with "no-ec2m" — "vo.x (Vit Ondruch)" <v.ondruch@...>

16 messages 2013/05/09

[#54921] [ruby-trunk - Bug #8393][Open] A class who's parent class is in a module can go wrong if files are required in the wrong order — "eLobato (Daniel Lobato Garcia)" <elobatocs@...>

15 messages 2013/05/12

[#54939] [ruby-trunk - Bug #8399][Open] Remove usage of RARRAY_PTR in C extensions when not needed — "dbussink (Dirkjan Bussink)" <d.bussink@...>

32 messages 2013/05/12

[#55053] [ruby-trunk - Feature #8426][Open] Implement class hierarchy method caching — "charliesome (Charlie Somerville)" <charliesome@...>

21 messages 2013/05/19

[#55096] [ruby-trunk - Feature #8430][Open] Rational number literal — "mrkn (Kenta Murata)" <muraken@...>

28 messages 2013/05/21

[#55197] [ruby-trunk - Feature #8461][Open] Easy way to disable certificate checking in XMLRPC::Client — "herwinw (Herwin Weststrate)" <herwin@...>

11 messages 2013/05/29

[ruby-core:54898] Re: [ruby-trunk - Feature #8321] Ripper: I would like coordinates for keywords

From: Magnus Holm <judofyr@...>
Date: 2013-05-10 07:48:16 UTC
List: ruby-core #54898
On Fri, May 10, 2013 at 9:13 AM, bozhidar (Bozhidar Batsov) <
bozhidar@batsov.com> wrote:

>
> Issue #8321 has been updated by bozhidar (Bozhidar Batsov).
>
>
> The example outlined in the proposal is exactly what I think we need.  A
> lot of Ruby code analysis tools need exact coordinates of keywords and
> currently there is no easy and reliable way to get them.  This is even more
> important, now that you've rejected #8383


You can use the `parser` gem: https://github.com/whitequark/parser

It gives you a nice AST together with source maps:

  require 'parser/current'
  ast = Parser::CurrentRuby.parse('if a; b; else; c; end')

(if
  (send nil :a)
  (send nil :b)
  (send nil :c))

  ast.source_map.expression # => 0...21 (the whole expression)
  ast.source_map.keyword # => 0...2 (the "if")
  ast.source_map.begin # => 4...5 (the ";")
  ast.source_map.else # => 9...13 (the "else")
  ast.source_map.end # => 18...12 (the "end")

And you can then check the children for more data:

  (cond, tbranch, fbranch) = *ast

  cond.source_map.expression # => 3...4 ("a")

All of these return a Source::Range which allows you to extract the source
and lineno/column:

  cond.source_map.expression.to_source # => "a"
  cond.source_map.expression.line # => 1
  cond.source_map.expression.column # => 3

Parser also supports 1.8, 1.9, 2.0 and 2.1/trunk, *and* it ships with a
rewriter tool:
http://whitequark.org/blog/2013/04/26/lets-play-with-ruby-code/

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