Integer conversions too pedantic in 64-bit

[bearophile]

Steven Schveighoffer:

> Yes, David has proposed a corrected version on the Phobos mailing list:
> 
> http://lists.puremagic.com/pipermail/phobos/2011-February/004493.html

I suggest it to return a signed value, like an int. But a signed long is OK too.
I suggest a name as "len" (or "slen") because I often write "length" wrongly.

Does it support code like:
auto l = arr.len;
arr.len = 10;
arr.len++;

A big problem: it's limited to arrays, so aa.len or rbtree.len, set.len, etc, don't work. So I'd like something more standard... So I am not sure this is a good idea.

Bye,
bearophile