Re: [libxml-devel] << operator

[Charlie Savage]

A contrived example, but this code absolutely irritates the shit out of me:

Class F
 def a=(b)
   @z = b + 1
   return @z
 end
 def a
   return @z
 end
end
f = F.new
x = f.a = 1
p f.a  # Prints 2
p x    # Prints 1

That's bizarre. What is going on there? Print statement show that def a= is called before def a, so can x ever be set to 1?

It's an "optimization". The rvalue of an assignment is the argument to all lvalues in an assignment statement. i.e.: x = f.a = 1 is translated into "x = 1 ; f.a = 1". I think that was a very bad decision, but oh well. Ruby ain't perfect and this, to me at least, is perfect justification for doing what is right vs. what is "standard." -sc

Ah.  That is silly.

Charlie

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