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Bug #6115

closed

A block after the do-block without parenthesis

Added by nobu (Nobuyoshi Nakada) over 12 years ago. Updated over 12 years ago.

Status:
Closed
Assignee:
-
Target version:
1.9.3
ruby -v:
ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.3.0]
Backport:
[ruby-dev:45308]

Description

=begin
= ((<pull request 102 by pasberth: A block after the do-block without parenthesis|URL:https://github.com/ruby/ruby/pull/102>))
((<patch|URL:https://github.com/pasberth/ruby/commit/2d6624238aae89110141a8e223f244bf92eb27a9>))

I think seemingly this source code is no problem:

$ cat unexpected.rb

langs = ["Ruby"]
langs.each_with_object [] do |lang, the_langs|
the_langs << "The #{lang}"
end.each do |the_lang|
puts the_lang
end

But syntax error:

$ ruby unexpected.rb
unexpected.rb:4: syntax error, unexpected keyword_do
end.each do |the_lang|
^
unexpected.rb:5: syntax error, unexpected tIDENTIFIER, expecting keyword_do or '{' or '('

I want to this code behaves like:

$ cat expected.rb

langs = ["Ruby"]
(langs.each_with_object [] do |lang, the_langs|
the_langs << "The #{lang}"
end).each do |the_lang|
puts the_lang
end

$ ruby expected.rb
The Ruby

I changed the block_call in the parse.y to a primary-expression.

$ ./ruby -I./lib -I. unexpected.rb
The Ruby

英語に自信がないので日本語でも失礼します。

上の unexpected.rb はぼくには一見なんの問題もなさそうなコードに見えます。
しかしそれは構文エラーです。
ぼくはこのブロックを一次式として扱うべきだと思いました。

=end

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