Yuki Okushi ca6798ab07 Rollup merge of #86479 - exphp-forks:float-debug-exponential, r=yaahc ... Automatic exponential formatting in Debug Context: See [this comment from the libs team](https://github.com/rust-lang/rfcs/pull/2729#issuecomment-853454204) --- Makes `"{:?}"` switch to exponential for floats based on magnitude. The libs team suggested exploring this idea in the discussion thread for RFC rust-lang/rfcs#2729. (**note:** this is **not** an implementation of the RFC; it is an implementation of one of the alternatives) Thresholds chosen were 1e-4 and 1e16. Justification described [here](https://github.com/rust-lang/rfcs/pull/2729#issuecomment-864482954). **This will require a crater run.** --- As mentioned in the commit message of 8731d4dfb4, this behavior will not apply when a precision is supplied, because I wanted to preserve the following existing and useful behavior of `{:.PREC?}` (which recursively applies `{:.PREC}` to floats in a struct): ```rust assert_eq!( format!("{:.2?}", [100.0, 0.000004]), "[100.00, 0.00]", ) ``` I looked around and am not sure where there are any tests that actually use this in the test suite, though? All things considered, I'm surprised that this change did not seem to break even a single existing test in `x.py test --stage 2`. (even when I tried a smaller threshold of 1e6)		2021-10-20 04:35:10 +09:00
..
builders.rs	Ignore automatically derived impls of Clone and Debug in dead code analysis	2021-09-09 19:49:07 +02:00
float.rs	Automatic exponential formatting in Debug	2021-06-19 20:53:26 -04:00
mod.rs	mv std libs to library/	2020-07-27 19:51:13 -05:00
num.rs	Use a test value that doesn't depend on the handling of even/odd rounding	2021-10-03 20:15:12 -07:00