print floating point values at full precision by default

[steveklabnik]

Issue by thestinger
Wednesday May 21, 2014 at 20:08 GMT

For earlier discussion, see rust-lang/rust#14339

This issue was labelled with: I-enhancement in the Rust repository

---

By rounding to a specific number of digits by default, the standard library is causing confusion. Printing to a specified precision is very useful, but it should only happen via {:.2} rather than by default.

[retep998]

I think this is especially important for Debug which is supposed to print things as closely as possible to how they would be in code. When I can't accurately replicate values due to lost precision, that's bad.

[Centril]

Since this seems to be a breaking change I'm closing it as non-actionable.

[retep998]

We've made changes to how numbers were formatted before so we don't guarantee stability on that sort of thing.

[Centril]

@retep998 if you say so... however, I would like to prevent this from being open forever; someone should either act on it (soon), or it should be closed.