Josh Stone c2997d6c3d Allow large f64-to-f32 to saturate to infinity ...

The implementation of `<f64 as ToPrimitive>::to_f32` was written at a
time when float-to-float overflow was though to be undefined behavior,
per rust-lang/rust#15536, but this was later determined to be fine.
Casting a large `f64` to `f32` just results in an infinity with the
matching sign. The sign gives more information than if `to_f32` just
returns `None`, so now we let these infinities through as a result.

See also rust-num/num-bigint#163 and rust-num/num-rational#83.

2020-08-27 17:17:32 -07:00

..

cast.rs

Allow large f64-to-f32 to saturate to infinity

2020-08-27 17:17:32 -07:00