Commits on Jan 7, 2023

1. fix(swc_ecma_codegen): fix LineCol calculation of printed files …

   There were several issues with the way we updated the current `LineCol` position during the printing of the generated file:
   
   - We used `chars` and `char_indices` (UTF-32) instead of `encode_utf16` (UTF-16) chars.
     - JS uses UCS-2 (basically UTF-16) for its strings, and sourcemaps default to that implicitly.
   - `\r` was incorrectly handled
     - it didn't add a `line_start`, only `\n` did
   - `\r\n` was incorrectly handled
     - It was trying to let `\n` path handle the `line_start`, but it called `chars.next()` which ate the `\n` char.
   
   I also took the opportunity to avoid the `Vec` allocations and reduced some code duplication.

   

   jridgewell committed Jan 7, 2023
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