Module binary_search_util
rustc_ap_rustc_data_structures
Uses a sorted slice data: &[E] as a kind of "multi-map". The key_fn extracts a key of type K from the data, and this function finds the range of elements that match the key. data must have been sorted as if by a call to sort_by_key for this to work.
data: &[E]
key_fn
K
data
sort_by_key