From: Brian Candler <b.candler@...>
Date: 2011-02-12T19:46:10+09:00
Subject: Re: print comparison

Something you could consider is passing a block:

def mi(&blk)
  res = blk.call
end

mi { 4 == 3}

But that would only help if you were running in a Ruby environment where 
you could convert the block back into its AST.

Or have a look at how rspec does it:

   4.should == 3

That is, define Object#should which returns a wrapper object which 
implements the comparison plus whatever side effects you want.

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