More features for `Float`

[cuviper]

From @bluss on March 7, 2016 15:19

If Float truly is for f32 and f64 (it should be), we can frontload it with as much features as possible.

Wishlist:

• 'static
• Display + Debug + LowerExp + UpperExp
• Send + Sync

Copied from original issue: rust-num/num#178

[cuviper]

From @AtheMathmo on November 1, 2016 8:50

I just want to second Display + Debug. This is a real pain-point for me. I have some core functions which work on Float generics and are used all over the place. If I need to debug one of these functions I have to change trait bounds all over the place to print my data structures containing generic Floats.

There are other ways around it - like writing helper functions to convert my data structures to non-generic types that implement Display + Debug. But I think it makes sense to include these in Float. If this isn't considered a breaking change and is wanted I'd be happy to put a PR in.

[cuviper]

From @bluss on November 1, 2016 9:11

Here's a fun workaround: https://docs.rs/debugit/0.1.0/debugit/struct.DebugIt.html (Requires nightly right now, but you just use it for debugging anyway).

[cuviper]

From @AtheMathmo on November 1, 2016 9:13

Oh neat, thanks!

[cuviper]

I've decided to limit the clutter of breaking change issues, so they will now be tracked collectively in #47. I'm closing this issue for now as postponed but we can still discuss its merits here as needed.