From: Hiroshi NAKAMURA <nakahiro@...>
Date: 2011-06-26T19:01:31+09:00
Subject: [ruby-dev:43937] [Ruby 1.9 - Bug #4543] Ripperで"<<-eos\neos"を正常にパースできない


Issue #4543 has been updated by Hiroshi NAKAMURA.

Target version set to 1.9.3


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Bug #4543: Ripperで"<<-eos\neos"を正常にパースできない
http://redmine.ruby-lang.org/issues/4543

Author: Kazunori SAKAMOTO
Status: Assigned
Priority: Normal
Assignee: Nobuyoshi Nakada
Category: ext
Target version: 1.9.3
ruby -v: ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]


=begin
Ripper::SexpBuilder.new(%Q!<<-eos\neos!).parse
にて、on_heredoc_end メソッドが呼び出されません。

■検証済みバージョン
ruby 1.9.3dev (2011-03-31 trunk 31223) [i686-linux]
ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]
ruby 1.9.1p431 (2011-02-18 revision 30908) [i686-linux]

■検証用スクリプト
require 'ripper'

class Parser < Ripper::SexpBuilder
  ms = Ripper::SexpBuilder.new('').methods
  defs = ms.map { |s| s.to_s }
    .select { |s| s.start_with?('on_') }
    .map { |s| %Q{
  def #{s}(*args)
    print '#{s}: '
    p args
  end
    }}.join
  eval(defs)
end

def parse(src)
  puts "****" + src.inspect + "****"
  Parser.new(src).parse
  puts
end

parse(%Q!<<-eos\neos!)
parse(%Q!<<-eos\n\neos!)


■実行結果
****"<<-eos\neos"****
on_heredoc_beg: ["<<-eos"]
on_string_content: []
on_string_literal: [[]]
on_nl: ["\n"]
on_stmts_new: []
on_stmts_add: [[], [[]]]
on_program: [[[], [[]]]]

****"<<-eos\n\neos"****
on_heredoc_beg: ["<<-eos"]
on_string_content: []
on_tstring_content: ["\n"]
on_heredoc_end: ["eos"]
on_string_add: [[], ["\n"]]
on_string_literal: [[[], ["\n"]]]
on_nl: ["\n"]
on_stmts_new: []
on_stmts_add: [[], [[[], ["\n"]]]]
on_program: [[[], [[[], ["\n"]]]]]
=end



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