From: Kazunori SAKAMOTO <kazuu@...>
Date: 2011-07-01T00:00:21+09:00
Subject: [ruby-dev:44004] [Ruby 1.9 - Bug #4544] Ripperで「:"a \n b \n c"」を正常にパースできない


Issue #4544 has been updated by Kazunori SAKAMOTO.


Thank you for solving this issue !
----------------------------------------
Bug #4544: Ripperで「:"a \n b \n c"」を正常にパースできない
http://redmine.ruby-lang.org/issues/4544

Author: Kazunori SAKAMOTO
Status: Closed
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: -


=begin
Ripper::SexpBuilder.new(%Q!:"a \n b \n c"!).parse にて、on_tstring_content メソッドが二回連続で呼び出されます。

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!:"a \n b \n c"!)
 parse(%Q!:"a \n b  c"!)
 parse(%Q!:"a  b  c"!)

実行結果
 ----":\"a \n b \n c\""----
 on_symbeg: [":\""]
 on_tstring_content: ["a \n b \n"]
 on_tstring_content: [" c"]
 on_xstring_new: []
 on_xstring_add: [[], [" c"]]
 on_tstring_end: ["\""]
 on_dyna_symbol: [[[], [" c"]]]
 on_stmts_new: []
 on_stmts_add: [[], [[[], [" c"]]]]
 on_program: [[[], [[[], [" c"]]]]]

 ----":\"a \n b  c\""----
 on_symbeg: [":\""]
 on_tstring_content: ["a \n"]
 on_tstring_content: [" b  c"]
 on_xstring_new: []
 on_xstring_add: [[], [" b  c"]]
 on_tstring_end: ["\""]
 on_dyna_symbol: [[[], [" b  c"]]]
 on_stmts_new: []
 on_stmts_add: [[], [[[], [" b  c"]]]]
 on_program: [[[], [[[], [" b  c"]]]]]

 ----":\"a  b  c\""----
 on_symbeg: [":\""]
 on_tstring_content: ["a  b  c"]
 on_xstring_new: []
 on_xstring_add: [[], ["a  b  c"]]
 on_tstring_end: ["\""]
 on_dyna_symbol: [[[], ["a  b  c"]]]
 on_stmts_new: []
 on_stmts_add: [[], [[[], ["a  b  c"]]]]
 on_program: [[[], [[[], ["a  b  c"]]]]]
=end



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