Jridgewell index #54
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Jridgewell index #54
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The old code improperly found the section to call recurse into. Sourcemap sections behave very similarly to the mappings, and we need to find the section whose offset is `<=` the desired position. Additionally, the `col` is only subtracted if it is on the offset's line. This matches [Mozilla's behavior](https://github.com/mozilla/source-map/blob/0.6.1/lib/source-map-consumer.js#L1000-L1003). And as a final bonus, we can binary search it to speed up searches on larger maps.
Token lookup uses "greatest lower bound" lookups, which means we need to find the token on the line which is `<=` than our desired column. But, the old code accidentally considered the last token to span infinite columns and infinite lines, meaning a lookup of `(10000000, 0)` would return the last token.
kamilogorek
approved these changes
Nov 9, 2022
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With suggestions applied and clippy fixed again
#53