[Issue 11320] std.math.fmod, round, trunc are not yet pure

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=11320

Simon Naarmann <eiderdaus at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86                         |All
           Assignee|eiderdaus at gmail.com         |nobody at puremagic.com
                 OS|Windows                     |All

--- Comment #5 from Simon Naarmann <eiderdaus at gmail.com> ---
Sorry, I lack the time these weeks. I've unassigned myself.

Here are my ideas:

- Refactor setControlState into a string mixin (seems best w.r.t. spec?)
- Refactor setControlState into standalone pure function (weird because it's
impure)
- Cast round() to pure inside Phobos even though we call setCountrolState
(feels like a bad idea)

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