From: Farrel Lifson <farrel.lifson@...>
Date: 2006-03-07T21:31:02+09:00
Subject: Rescue on do end blocks

I've been playing around with rescue expressions and besides being put
on functions they also seem to work when defining classes (useful for
metaprogramming perhaps?)

irb(main):001:0> class Test
irb(main):002:1>   raise
irb(main):003:1> rescue
irb(main):004:1>   puts "Error"
irb(main):005:1> ensure
irb(main):006:1*   puts "Cleaned up"
irb(main):007:1> end
Error
Cleaned up

However, why can they not be applied to do end blocks?

irb(main):016:0> [1,2,3].each do |num|
irb(main):017:1*   num.upcase
irb(main):018:1> rescue
irb(main):019:1>   puts "Error"
irb(main):020:1> ensure
irb(main):021:1*   puts "Clened up"
irb(main):022:1> end
SyntaxError: compile error
(irb):18: syntax error
(irb):20: syntax error
        from (irb):22

Farrel