Foreach Range Statement

[Sean Kelly]

Reiner Pope wrote:
> Bill Baxter wrote:
>> Don Clugston wrote:
>>> I think the convention "first_element .. last_element+1" cannot be 
>>> extended to negative and floating-point numbers without creating an 
>>> inconsistency. Which is quite unfortunate.
> 
> I'm not sure of the problem with negative integers is. Even for negative 
> integers x, the identity still holds, that the following two expressions 
> are equivalent:
> 
>      a <= x
>      a <  x+1
> 
> But the floating point issue is a bummer. And it's also a bit silly for 
> chars. To test whether c is a digit, you would have to write:
> 
>    c in ['0'..'9'+1]
> 
> which looks a little silly.

Perhaps there should be an operator for inclusive vs. exclusive ranges. 
  Something like:

c in ['0' -> '9']

Not ideal, I know.


Sean