[Issue 6652] foreach parameter with number range is always ref

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6652



--- Comment #6 from dawg at dawgfoto.de 2011-09-13 21:49:08 PDT ---
It really is not that much an issue of performance.
The compiler should be able to eliminate dead assignments
and *& for ref parameters.

The issue is that of breaking code. I don't know any feasible
solution to attach a deprecation to this now and change it later.

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