- if eq_or_numeric((first_i, first_e)) {
- let last_i = interned_chars.next_back().expect("we know we have at least two chars");
- let last_e = existing_chars.next_back().expect("we know we have at least two chars");
- if eq_or_numeric((last_i, last_e)) {
- if interned_chars
- .zip(existing_chars)
- .filter(|&ie| !eq_or_numeric(ie))
- .count()
- != 1
- {
- continue;
+ if eq_or_numeric((first_i, first_e)) {
+ let last_i = interned_chars.next_back().expect("we know we have at least two chars");
+ let last_e = existing_chars.next_back().expect("we know we have at least two chars");
+ if eq_or_numeric((last_i, last_e)) {
+ if interned_chars
+ .zip(existing_chars)
+ .filter(|&ie| !eq_or_numeric(ie))
+ .count()
+ != 1
+ {
+ continue;
+ }
+ } else {
+ let second_last_i = interned_chars
+ .next_back()
+ .expect("we know we have at least three chars");
+ let second_last_e = existing_chars
+ .next_back()
+ .expect("we know we have at least three chars");
+ if !eq_or_numeric((second_last_i, second_last_e))
+ || second_last_i == '_'
+ || !interned_chars.zip(existing_chars).all(eq_or_numeric)
+ {
+ // allowed similarity foo_x, foo_y
+ // or too many chars differ (foo_x, boo_y) or (foox, booy)
+ continue;
+ }
+ split_at = interned_name.char_indices().rev().next().map(|(i, _)| i);