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Add Span::trim_end

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This is the counterpart of `Span::trim_start`.
This commit is contained in:
Zalathar 2024-06-03 17:00:10 +10:00
parent e609c9b254
commit df96cba432
2 changed files with 26 additions and 0 deletions
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19
compiler/rustc_span/src/tests.rs
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@ -61,6 +61,25 @@ fn test_trim() {
// The resulting span's context should be that of `self`, not `other`.
let other = span(start, end).with_ctxt(SyntaxContext::from_u32(999));
// Test cases for `trim_end`.
assert_eq!(span(well_before, before).trim_end(other), Some(span(well_before, before)));
assert_eq!(span(well_before, start).trim_end(other), Some(span(well_before, start)));
assert_eq!(span(well_before, mid).trim_end(other), Some(span(well_before, start)));
assert_eq!(span(well_before, end).trim_end(other), Some(span(well_before, start)));
assert_eq!(span(well_before, after).trim_end(other), Some(span(well_before, start)));
assert_eq!(span(start, mid).trim_end(other), None);
assert_eq!(span(start, end).trim_end(other), None);
assert_eq!(span(start, after).trim_end(other), None);
assert_eq!(span(mid, end).trim_end(other), None);
assert_eq!(span(mid, after).trim_end(other), None);
assert_eq!(span(end, after).trim_end(other), None);
assert_eq!(span(after, well_after).trim_end(other), None);
// Test cases for `trim_start`.
assert_eq!(span(after, well_after).trim_start(other), Some(span(after, well_after)));