pub fn hoist_top_frame_meaning_delta(pre_snapshot: &[SymStr])Expand description
Hoist every Meaning binding installed at the topmost frame since
pre_snapshot was taken to GLOBAL scope. Idempotent: keys already
in pre_snapshot are skipped. Operates on the Meaning table only —
callers that need to promote Value/Catcode/etc. should add parallel
helpers (none required so far).