1 // Copyright 2015-2016 Brian Smith.
2 //
3 // Permission to use, copy, modify, and/or distribute this software for any
4 // purpose with or without fee is hereby granted, provided that the above
5 // copyright notice and this permission notice appear in all copies.
6 //
7 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10 // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15 //! Polyfills for functionality that will (hopefully) be added to Rust's
16 //! standard library soon.
17
18 #[inline(always)]
u64_from_usize(x: usize) -> u6419 pub const fn u64_from_usize(x: usize) -> u64 {
20 x as u64
21 }
22
usize_from_u32(x: u32) -> usize23 pub fn usize_from_u32(x: u32) -> usize {
24 x as usize
25 }
26
27 pub mod slice {
28 // https://github.com/rust-lang/rust/issues/27750
29 // https://internals.rust-lang.org/t/stabilizing-basic-functions-on-arrays-and-slices/2868
30 #[inline(always)]
fill<T>(dest: &mut [T], value: T) where T: Copy,31 pub fn fill<T>(dest: &mut [T], value: T)
32 where
33 T: Copy,
34 {
35 for d in dest {
36 *d = value;
37 }
38 }
39 }
40