Use cursor offset for lexer checkpoint #11734
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dhruvmanila
commented
Jun 4, 2024
Comment on lines
+1373
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+1376
| let mut cursor = Cursor::new(self.source); | ||
| // We preserve the previous char using this method. | ||
| cursor.skip_bytes(cursor_offset.to_usize()); | ||
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We could use Cursor::new(self.source[cursor_offset.to_usize()..] but that would always set the previous character to EOF.
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carljm
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Jun 4, 2024
* main: CI: add job to run tests under minimum supported rust version (msrv) (#11737) Lexer should consider BOM for the start offset (#11732) Use cursor offset for lexer checkpoint (#11734) red-knot: Change `resolve_global_symbol` to take `Module` as an argument (#11723) red-knot: Use `parse_unchecked` to get all parse errors (#11725) Respect per-file ignores for blanket and redirected noqa rules (#11728) [`pygrep_hooks`] Check blanket ignores via file-level pragmas (`PGH004`) (#11540)
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Summary
This PR updates the lexer checkpoint to store the cursor offset instead of cloning the cursor itself. This reduces the size of
LexerCheckpointfrom 136 to 112 bytes and also removes the need for lifetime.Test Plan
cargo insta test