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| author | varkor <github@varkor.com> | 2018-02-01 18:35:51 +0000 |
|---|---|---|
| committer | varkor <github@varkor.com> | 2018-02-01 18:35:51 +0000 |
| commit | e34c31bf02eb0f0ff4dd43ae72e0eae53f2ac519 (patch) | |
| tree | c34982b69b6abcab93be85bb1e42a6e180487962 /src/libstd | |
| parent | 90eb44a5897c39e3dff9c7e48e3973671dcd9496 (diff) | |
| download | rust-e34c31bf02eb0f0ff4dd43ae72e0eae53f2ac519.tar.gz rust-e34c31bf02eb0f0ff4dd43ae72e0eae53f2ac519.zip | |
Use constant for 180/π in to_degrees
The current `f32|f64.to_degrees` implementation uses a division to calculate 180/π, which causes a loss of precision. Using a constant is still not perfect (implementing a maximally-precise algorithm would come with a high performance cost), but improves precision with a minimal change.
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/f32.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs index 9810dede618..ecf68f29d6f 100644 --- a/src/libstd/f32.rs +++ b/src/libstd/f32.rs @@ -1531,6 +1531,7 @@ mod tests { assert!(nan.to_degrees().is_nan()); assert_eq!(inf.to_degrees(), inf); assert_eq!(neg_inf.to_degrees(), neg_inf); + assert_eq!(1_f32.to_degrees(), 57.2957795130823208767981548141051703); } #[test] |