fix(oxc_codegen): don't emit empty span mapping #7448
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``` ast-grep -p '$A.add_source_mapping($B.start)' -r '$A.add_source_mapping_by_span($B, $B.start)' -U ```
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CodSpeed Performance ReportMerging #7448 will not alter performanceComparing Summary
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Boshen
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Nov 24, 2024
``` ast-grep -p '$A.add_source_mapping($B, $C.end)' -r '$A.add_source_mapping_end($B)' -U ```
``` ast-grep -p '$A.add_source_mapping($B, $C)' -r '$A.add_source_mapping($B)' -U ```
IWANABETHATGUY
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IWANABETHATGUY
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Currently empty span
SPANis generated and this is likely problematic as it gives false mapping for original source's first line.Here is how it affects rolldown sourcemap snapshots:
Interestingly, esbuild leaves mapping for module wrapper code (e.g.
var require_xxx = __commonJS(...)), but not sure if it's designed so: esbuild.try, sourcemap viz