Module strref 

Borrowed-slice string view that shares a parent Arc<str>.

StrRef is a lightweight wrapper around an owning Arc<str> plus byte-range offsets. Cloning it is an atomic Arc bump plus two word-sized copies — no heap allocation — so methods like slice, split.first, substring can return a view into their input without allocating a fresh Arc<str> per row.

Invariants (enforced at construction):

• start <= end <= parent.len().
• parent[start..end] is valid UTF-8 (the parent is, and we never split between code units — callers construct slices via str::char_indices or ASCII-only byte offsets).

as_str() returns the view slice. Deref<Target=str> / AsRef<str> allow existing string APIs (len, chars, find, memchr, etc.) to work against a StrRef transparently.

Structs

StrRef