[swift-evolution] Proposal: Auto-convert for numbers when safe

[Pyry Jahkola]

> On 05 Dec 2015, at 14:27, Jonathan Hull <jhull at gbis.com> wrote:
> 
> For example:
> • Int -> Float, Double, or CGFloat (but not the other way)

These are not "safe" conversions in general. A Float can only hold integral values up to 2^24, and Double a only up to 2^53. Neither can fit 64-bit integers and the former not even Int32.

> On a side note, can we get a version of floor() which returns an Int (or have I missed that somewhere)?


This would be nice. As would be similar versions of ceil and round.

— Pyry Jahkola
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