Tricky semantics of ranges & potentially numerous Phobos bugs

[monarch_dodra]

On Wednesday, 17 October 2012 at 17:15:14 UTC, Andrei
Alexandrescu wrote:
> On 10/16/12 3:07 PM, H. S. Teoh wrote:
>> Perhaps mark ranges with an .isTransient property
>
> isTransient!R is exactly the same thing as isInputRange!R && 
> !isForwardRange!R.
>
> Andrei

Technically, (isTransient!R) is just a subset of (isInputRange!R
&& !isForwardRange!R)

"byDChar" (if it existed), would be a perfectly valid
non-transient input only range.