[Issue 4535] std.range could have a takeWhile!pred(range) function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=4535

--- Comment #15 from timon.gehr at gmx.ch ---
I am not satisfied with the proposed workaround, because this function should
obviously be standardized. Please don't suggest that I should be "satisfied" or
that my concern is "trivial". It's not respectful. Thanks.

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