Feature gate: #![feature(hasher_prefixfree_extras)]
This is a tracking issue for the new provided methods on Hasher added to fix #94026
write_str lets the hasher customize how it works with str, so it can use the b'\xFF' trick if it's byte-wise, or a different approach if it does chunked rounds.write_length_prefix gives an obvious choice when implementing Hash for collections (like VecDeque) which can't just use the slice hash, and allows the hasher to optimize how best to represent the length.// core::hash
pub trait Hasher {
// ... existing stuff ...
fn write_length_prefix(&mut self, len: usize);
fn write_str(&mut self, s: &str);
} Steps / History
Hasher #94598write_str provided implementation be? It was added matching the previous impl Hash for str behaviour to get in without breaking hash checks (like the one in cargo), but that's not always prefix-free (it depends on the round strategy), so there's an argument that a different implementation would be better.RetroSearch is an open source project built by @garambo | Open a GitHub Issue
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