fn member_receiver(line: &str) -> Option<String>Expand description
UpperIdent.<partial> at the cursor → Some("UpperIdent") — a name
receiver whose members are statically enumerable (a sum/refined/opaque
type or a capability). Conservative: the receiver is a single
uppercase-initial identifier, not itself a .-qualified segment (so
bynk.cloudflare. and a.B. are excluded) and not a number (so the
decimal 1. is excluded). A lowercase x. is a value receiver — deferred
to slice 3 — and yields None.