SWC parser returns unevenly escaped windows path in ast #11214
Description
Describe the bug
Having a windows path in a variable returns part of path segment have duplicated backslash, output ast is
{ "type": "Module", "span": { "start": 0, "end": 108 }, "body": [ { "type": "VariableDeclaration", "span": { "start": 0, "end": 108 }, "ctxt": 0, "kind": "var", "declare": false, "declarations": [ { "type": "VariableDeclarator", "span": { "start": 4, "end": 108 }, "id": { "type": "Identifier", "span": { "start": 4, "end": 16 }, "ctxt": 2, "value": "coverageData", "optional": false, "typeAnnotation": null }, "init": { "type": "ObjectExpression", "span": { "start": 19, "end": 108 }, "properties": [ { "type": "KeyValueProperty", "key": { "type": "Identifier", "span": { "start": 26, "end": 30 }, "value": "path" }, "value": { "type": "StringLiteral", "span": { "start": 32, "end": 101 }, "value": "C:\\github\\swc-plugin-coverage-instrument\\spec\\\\util\\verifier.ts", "raw": "\"C:\\\\github\\\\swc-plugin-coverage-instrument\\\\spec\\\\util\\\\verifier.ts\"" } } ] }, "definite": false } ] } ], "interpreter": null } the relavant node is
"value": { "type": "StringLiteral", "span": { "start": 32, "end": 101 }, "value": "C:\\github\\swc-plugin-coverage-instrument\\spec\\\\util\\verifier.ts", "raw": "\"C:\\\\github\\\\swc-plugin-coverage-instrument\\\\spec\\\\util\\\\verifier.ts\"" } in value, there's spec\\\\util while all others are \\.
Input code
var coverageData = { path: "C:\\github\\swc-plugin-coverage-instrument\\spec\\util\\verifier.ts", }Config
Default ast parser config in playgroundLink to the code that reproduces this issue
SWC Info output
Operating System: Platform: win32 Arch: x64 Machine Type: x86_64 Version: Windows 11 Pro CPU: (8 cores) Models: Snapdragon (TM) 8cx Gen 3 @ 3.0 GHz Binaries: Node: 25.1.0 npm: 11.6.2 Yarn: N/A pnpm: N/A Relevant Packages: @swc/core: 1.14.0 @swc/helpers: N/A @swc/types: 0.1.25 typescript: 5.5.3 SWC Config: output: N/A .swcrc path: N/A Next.js info: output: N/A Expected behavior
expect "value": "C:\\github\\swc-plugin-coverage-instrument\\spec\\util\\verifier.ts",
Actual behavior
value output have inconsistent backslash
"value": "C:\\github\\swc-plugin-coverage-instrument\\spec\\\\util\\verifier.ts",
Version
1.14.0
Additional context
No response