/// Returns a new span representing the next character after the end-point of this span
pub fn next_point(&self, sp: Span) -> Span {
- let pos = sp.lo().0;
+ let start_of_next_point = sp.hi().0;
let width = self.find_width_of_character_at_span(sp, true);
- let corrected_next_position = pos.checked_add(width).unwrap_or(pos);
-
- let next_point = BytePos(cmp::max(sp.hi().0, corrected_next_position));
- Span::new(next_point, next_point, sp.ctxt())
+ // If the width is 1, then the next span should point to the same `lo` and `hi`. However,
+ // in the case of a multibyte character, where the width != 1, the next span should
+ // span multiple bytes to include the whole character.
+ let end_of_next_point = start_of_next_point.checked_add(
+ width - 1).unwrap_or(start_of_next_point);
+
+ let end_of_next_point = BytePos(cmp::max(sp.lo().0 + 1, end_of_next_point));
+ Span::new(BytePos(start_of_next_point), end_of_next_point, sp.ctxt())
}
/// Finds the width of a character, either before or after the provided span.