[Issue 15928] chain(r1, r2, r3, ...) should discard all arguments after the first infinite range

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15928

--- Comment #3 from Marc Schütz <schuetzm at gmx.net> ---
Ah... I now remember the restriction that infinite ranges cannot be
bidirectional. I think this was a conscious decision in order to get a simpler
range hierarchy, but there was no fundamental reason to disallow it, right?

This restriction simplifies things for chain(): if any of the individual ranges
are infinite, the resulting chain cannot be bidirectional.

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