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Fix #103451, find_width_of_character_at_span return width with 1 when reaching end

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yukang 2022-10-25 20:47:19 +08:00
parent 9be2f35a4c
commit 6d455296fd
4 changed files with 46 additions and 10 deletions
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11
compiler/rustc_span/src/source_map/tests.rs
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@ -511,16 +511,17 @@ fn test_next_point() {
assert_eq!(span.lo().0, 4);
assert_eq!(span.hi().0, 5);
// A non-empty span at the last byte should advance to create an empty
// span pointing at the end of the file.
// Reaching to the end of file, return a span that will get error with `span_to_snippet`
let span = Span::with_root_ctxt(BytePos(4), BytePos(5));
let span = sm.next_point(span);
assert_eq!(span.lo().0, 5);
assert_eq!(span.hi().0, 5);
assert_eq!(span.hi().0, 6);
assert!(sm.span_to_snippet(span).is_err());
// Empty span pointing just past the last byte.
// Reaching to the end of file, return a span that will get error with `span_to_snippet`
let span = Span::with_root_ctxt(BytePos(5), BytePos(5));
let span = sm.next_point(span);
assert_eq!(span.lo().0, 5);
assert_eq!(span.hi().0, 5);
assert_eq!(span.hi().0, 6);
assert!(sm.span_to_snippet(span).is_err());
}