Proposal for SentinelInputRange

[FG]

On 2013-02-28 23:27, Walter Bright wrote:
> I've spent a lot of time profiling compilers. The result is pretty obvious - dmc
> is by far the fastest C/C++ compiler available, and dmd blows away about every
> other language in compile speed.
>
> Making this happen means you go after everything that eats time. Even a 5%
> improvement is a big deal. All those drips and draps add up to big speed increases.

I get that, but it doesn't require introducing a new type of range.