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The following program is legal in Ruby 1.9 and prints 6:

# -*- coding: utf-8 -*-
alias λ lambda
   |x,y| x*y}
puts ¥Æͼ2,3]

Is this a good thing?  Is this expected to remain legal, or is the 
parser likely to start enforcing rules about which characters are legal 
in identifiers?

(If you can't see the special characters, I'm using the greek letter 
lambda as an alias for the "lambda" method.  Then I'm creating a lambda 
and assigning it to a variable that uses the Unicode multiplication sign.)

The program might not work for you if you cut-and-pasted it from this 
message.  I believe the encoding got munged when I cut and pasted it to 
my mail program.  So I've also attached a gzipped version of the program 
to this message to preserve the utf-8 encoding.  You may or may not be 
able to display the program, but I you ought to be able to run it.

	David

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