line_column/span/
wrapper.rs

1use super::*;
2
3/// Newtype of `Span::len() == 0`
4#[derive(Clone, Default)]
5#[repr(transparent)]
6pub struct EmptySpan {
7    span: Span,
8}
9impl fmt::Debug for EmptySpan {
10    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
11        debug_assert!(self.is_empty());
12        write!(f, "EmptySpan({:?})", self.range().start())
13    }
14}
15impl ops::Deref for EmptySpan {
16    type Target = Span;
17
18    fn deref(&self) -> &Self::Target {
19        &self.span
20    }
21}
22impl From<EmptySpan> for Span {
23    fn from(span: EmptySpan) -> Self {
24        span.span
25    }
26}
27impl From<&EmptySpan> for Span {
28    fn from(span: &EmptySpan) -> Self {
29        span.span.clone()
30    }
31}
32
33// FIXME
34// 可以做一下 LikeRange, LikeText, LikeStrict, LikePhantom 去让 Ord, Hash, Borrow 只走固定的部分
35// 记得支持 Borrow
line_column/span/wrapper.rs

line_column/span/
wrapper.rs
