On Oct 5, 2008, at 15:35 , Dave Thomas wrote:

> Issue #615 has been updated by Dave Thomas.
>
>
> irb(main):001:0> x = "Sample"
> => "Sample"
> irb(main):002:0> x.instance_eval do
> irb(main):003:1*   puts self.class
> irb(main):004:1>   puts reverse
> irb(main):005:1> end
> String
> elpmaS

to take the idea one step further to the OP's request:

def with o, &block
   o.instance_eval(&block)
end

x = "Sample"
with x do
   puts self.class # needs self because class is part of the syntax
   puts reverse
end

To me, this seems simultaneously trivial and unhelpful. I wouldn't  
want to see it part of the language itself.