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Alex Queiroz <asandroq@gmail.com> writes:

> Hallo,
>
> On 9/23/09, Tony Finch <dot@dotat.at> wrote:
>> On Wed, 23 Sep 2009, steve donovan wrote:
>>  >
>>  > This is a common notion. What can Scheme do that cannot be expressed
>>  > in Lua?  (Note, this is an actual question)
>>
>>
>> The two biggies are continuations and macros.
>>
>
>      I would add that there are no statements, everything is an
>      expression.

(set! ... ) is not really an expression.  It has no value and only side
effects.

-- 
David Kastrup