remove the float type
#9519
Closed
remove the float type
#9519
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Shouldn't this remove something from |
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@huonw: done, no more |
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Don't worry, I wasn't going to r+ anyway: this is definitely one for the core-devs. :) |
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If a decision isn't reached before the next meeting, I'll bring this up at the next meeting. |
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As discussed in today's meeting we can merge this and remove float. |
It is simply defined as `f64` across every platform right now. A use case hasn't been presented for a `float` type defined as the highest precision floating point type implemented in hardware on the platform. Performance-wise, using the smallest precision correct for the use case greatly saves on cache space and allows for fitting more numbers into SSE/AVX registers. If there was a use case, this could be implemented as simply a type alias or a struct thanks to `#[cfg(...)]`. Closes #6592 The mailing list thread, for reference: https://mail.mozilla.org/pipermail/rust-dev/2013-July/004632.html
bors
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Oct 1, 2013
It is simply defined as `f64` across every platform right now. A use case hasn't been presented for a `float` type defined as the highest precision floating point type implemented in hardware on the platform. Performance-wise, using the smallest precision correct for the use case greatly saves on cache space and allows for fitting more numbers into SSE/AVX registers. If there was a use case, this could be implemented as simply a type alias or a struct thanks to `#[cfg(...)]`. Closes #6592 The mailing list thread, for reference: https://mail.mozilla.org/pipermail/rust-dev/2013-July/004632.html
flip1995
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Oct 6, 2022
uninit_vec: fix false positive with set_len(0)
`set_len(0)` does not create uninitialized elements. Fixes a false positive with the following pattern:
```rust
fn copy_slice_into_vec(dst: &mut Vec<u8>, src: &[u8]) {
dst.reserve(src.len().saturating_sub(dst.len()));
unsafe {
dst.set_len(0);
std::ptr::copy_nonoverlapping(src.as_ptr(), dst.as_mut_ptr(), src.len());
dst.set_len(src.len());
}
}
```
zulip thread: https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/uninit_vec.20and.20set_len.280.29
changelog: FP: [`uninit_vec`]: No longer lints `Vec::set_len(0)`
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It is simply defined as
f64across every platform right now.A use case hasn't been presented for a
floattype defined as thehighest precision floating point type implemented in hardware on the
platform. Performance-wise, using the smallest precision correct for the
use case greatly saves on cache space and allows for fitting more
numbers into SSE/AVX registers.
If there was a use case, this could be implemented as simply a type
alias or a struct thanks to
#[cfg(...)].Closes #6592
The mailing list thread, for reference:
https://mail.mozilla.org/pipermail/rust-dev/2013-July/004632.html