On Tuesday, 4 March 2014 at 04:59:12 UTC, Timothee Cour wrote:

Interfacing with ranges across libraries can be tricky due to heavy use of
templates. Example cases are when interfacing between D and C++ or when
using D shared libraries, that we would like to distribute with di
interface files.

I'd like to have something like the following in phobos (see code below).
The code makes an OOP wrapper for ranges, allowing one to use separate
compilation model without having to pull in all the source code if we want
to use the library with arbitrary ranges of a given element type (see
unittest below). This could also greatly benefit compilation time since it
enables us to use thin di interface files.

Have you seen InputRange and inputRangeObject in std.range?

http://dlang.org/phobos/std_range.html#.InputRange
http://dlang.org/phobos/std_range.html#inputRangeObject