forked from extern/nushell
38 lines
718 B
Rust
38 lines
718 B
Rust
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub struct Span {
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pub start: usize,
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pub end: usize,
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}
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impl Span {
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pub fn new(start: usize, end: usize) -> Span {
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Span { start, end }
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}
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pub fn unknown() -> Span {
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Span { start: 0, end: 0 }
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}
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pub fn offset(&self, offset: usize) -> Span {
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Span {
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start: self.start - offset,
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end: self.end - offset,
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}
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}
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}
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pub fn span(spans: &[Span]) -> Span {
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let length = spans.len();
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if length == 0 {
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Span::unknown()
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} else if length == 1 {
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spans[0]
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} else {
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Span {
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start: spans[0].start,
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end: spans[length - 1].end,
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}
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}
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}
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