[英]How do I fix Clippy's needless_range_loop for loops that copy between slices with an offset?
When running cargo clippy
, it complains about code like this: 当运行cargo clippy
,它会抱怨如下代码:
pub fn from_bytes(data: [u8; 72]) -> Stuff {
let mut ts = [0u8; 8];
let mut cs = [0u8; 64];
for b in 0..8 {
ts[b] = data[b];
}
for bb in 0..64 {
cs[bb] = data[bb + 8];
}
}
with 同
warning: the loop variable `bb` is used to index `cs`
--> src/main.rs:9:5
|
9 | / for bb in 0..64 {
10 | | cs[bb] = data[bb + 8];
11 | | }
| |_____^
|
= note: #[warn(needless_range_loop)] on by default
= help: for further information visit https://github.com/Manishearth/rust-clippy/wiki#needless_range_loop
help: consider using an iterator
| for (bb, <item>) in cs.iter().enumerate().take(64) {
I can not wrap my head around this information . 我无法为这些信息打招呼 。 How can I change to the suggested method? 如何更改为建议的方法? I don't get how something like 我不明白
for (bb, <item>) in cs.iter().enumerate().take(64)
can be applied to my use case. 可以应用于我的用例。
Use clone_from_slice 使用clone_from_slice
ts.clone_from_slice(&data[..8]);
cs.clone_from_slice(&data[8..]);
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