Re: Forward declarations in modules

[Nick Gammon <nick@...>]

On 08/09/2006, at 10:10 AM, Sam Roberts wrote:

> Surprise depends on your expectations, and that depends more on you
> than lua!

Indeed. My surprise is going away now. ;)

> The example shows multiple local variables being created with the same
> name. Example does this with a for loop, and your example unrolls the
> loop into consecutive local statements, but its the same thing
> happening.

Those examples do not show two local variables at the same scope level.

      local x = x         -- new 'x', with value 10
       print(x)            --> 10
       x = x+1
       do                  -- another block
         local x = x+1     -- another 'x'
         print(x)          --> 12
       end
       print(x)            --> 11

The second "local x" behaves as I expected, to define a new variable,  
as it is inside a different scope (do ... end).

> Example does this with a for loop, and your example unrolls the
> loop into consecutive local statements, but its the same thing
> happening.

Not really, because of the different scoping levels. That final x was  
11, not 12. If you take out the "do ... end" it takes the final value  
of x which will be 12.

Thanks to everyone for all the constructive comments. :)

- Nick