/// Finds the width of the character, either before or after the end of provided span,
/// depending on the `forwards` parameter.
+ #[instrument(skip(self, sp))]
fn find_width_of_character_at_span(&self, sp: Span, forwards: bool) -> u32 {
let sp = sp.data();
if sp.lo == sp.hi && !forwards {
- debug!("find_width_of_character_at_span: early return empty span");
+ debug!("early return empty span");
return 1;
}
let local_begin = self.lookup_byte_offset(sp.lo);
let local_end = self.lookup_byte_offset(sp.hi);
- debug!(
- "find_width_of_character_at_span: local_begin=`{:?}`, local_end=`{:?}`",
- local_begin, local_end
- );
+ debug!("local_begin=`{:?}`, local_end=`{:?}`", local_begin, local_end);
if local_begin.sf.start_pos != local_end.sf.start_pos {
- debug!("find_width_of_character_at_span: begin and end are in different files");
+ debug!("begin and end are in different files");
return 1;
}
let start_index = local_begin.pos.to_usize();
let end_index = local_end.pos.to_usize();
- debug!(
- "find_width_of_character_at_span: start_index=`{:?}`, end_index=`{:?}`",
- start_index, end_index
- );
+ debug!("start_index=`{:?}`, end_index=`{:?}`", start_index, end_index);
// Disregard indexes that are at the start or end of their spans, they can't fit bigger
// characters.
if (!forwards && end_index == usize::MIN) || (forwards && start_index == usize::MAX) {
- debug!("find_width_of_character_at_span: start or end of span, cannot be multibyte");
+ debug!("start or end of span, cannot be multibyte");
return 1;
}
let source_len = (local_begin.sf.end_pos - local_begin.sf.start_pos).to_usize();
- debug!("find_width_of_character_at_span: source_len=`{:?}`", source_len);
+ debug!("source_len=`{:?}`", source_len);
// Ensure indexes are also not malformed.
if start_index > end_index || end_index > source_len - 1 {
- debug!("find_width_of_character_at_span: source indexes are malformed");
+ debug!("source indexes are malformed");
return 1;
}
} else {
return 1;
};
- debug!("find_width_of_character_at_span: snippet=`{:?}`", snippet);
+ debug!("snippet=`{:?}`", snippet);
let mut target = if forwards { end_index + 1 } else { end_index - 1 };
- debug!("find_width_of_character_at_span: initial target=`{:?}`", target);
+ debug!("initial target=`{:?}`", target);
while !snippet.is_char_boundary(target - start_index) && target < source_len {
target = if forwards {
}
}
};
- debug!("find_width_of_character_at_span: target=`{:?}`", target);
+ debug!("target=`{:?}`", target);
}
- debug!("find_width_of_character_at_span: final target=`{:?}`", target);
+ debug!("final target=`{:?}`", target);
if forwards { (target - end_index) as u32 } else { (end_index - target) as u32 }
}