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Use TryInto to avoid unsafe. #507

Merged
merged 2 commits into from Jan 17, 2021
Merged

Use TryInto to avoid unsafe. #507

merged 2 commits into from Jan 17, 2021

Commits on Jan 4, 2021

  1. Use TryInto to avoid unsafe. 

    Previously, to_fields and to_fields_le used unsafe to convert a
&[u8] into a &[u8; 8]. Now that we're only supporting Rust
versions where TryInto is stable, we can use try_into().unwrap()
instead, making uuid entirely safe Rust.

In release mode, the compiler detects that the slice will always
be the correct size, so try_into can never fail. Thus, the unwrap
is optimized out and we end up with the exact same assembly
as the unsafe block.

Godbolt output showing the resulting assembly:
https://godbolt.org/z/nWxT6W

Closes uuid-rs#488.
    @Gaelan
    Gaelan committed Jan 4, 2021
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  2. Remove TryFrom import.

    @Gaelan
    Gaelan committed Jan 4, 2021
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