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**Subject**: **RE: explanation of ":=" proposal+examples**
**From**: Luiz Carlos Silveira <luiz@...>
**Date**: Fri, 1 Jun 2001 15:38:56 -0300

> function f()
> -- I would prefer x to be local in this case
> -- because the use of "x :=" declares it local
> -- for the whole function, but it would also
> -- be safe to treat it as non-local until
> -- the first use of "x :="
> z := x
> x := 3
> return z
> end
>
> Tom.
What would happen if we have a variable "found" that is global
and we call the routine below:
function find(element, table)
i:=1
while ((not found) and (i<getn(table)) do
if (table[i] == element) then
found:=i
end
i:=i+1
end
return found
end
Do you mean that "found" would only be treated as local if an element was
found ?
If so and the global "found" is non-nil, this algorithm will fail (will
always return the value of the global "found").
Or you are proposing that this function gets translated into the current lua
semantics (in a kind o preprocessing) to something like:
function find(element, table)
local found ...
(this way, "found" will always be initialized with the value 'nil') ?
[]'s
Luiz