From: Trygve Flathen <at.ruby-forum@...>
Date: 2011-07-23T19:41:35+09:00
Subject: code ok in ruby, but fails in irb

The following statement, with the newline, is ok with ruby but generates
a syntax error in irb:

"#{ begin "#{3}" end
}"

I expect that ruby and irb should have the same idea of what constitutes
legal code?

I encountered the problem while testing this function:

def maketable(infohash)
  "<table>#{
    infohash.collect{|k,v|
      "<tr><td>#{k}</td><td>#{v}</td></tr>"
    }.join
  }</table>"
end

Dump from test terminal:

sh-4.1$ ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-linux]
sh-4.1$ cat x.rb
"#{ begin "#{3}" end
}"
sh-4.1$ ruby x.rb
sh-4.1$ irb
irb(main):001:0> "#{ begin "#{3}" end }"
=> "3"
irb(main):002:0> "#{ begin "#{3}" end
SyntaxError: compile error
(irb):2: syntax error, unexpected $end, expecting '}'
  from (irb):2
  from :0

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