[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@swc-next/parser (source)	0.5.0 → 0.6.0

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Release Notes

swc-project/swc-next (@​swc-next/parser)

v0.6.0

Compare Source

🚀 Features

• (minifier) Remove branches with constant conditions (#​1371)
• (minifier) Mangle local binding names (#​1432)
• (formatter) Add JavaScript and TypeScript formatting (#​736)
• (minifier) Join adjacent statements and remove unneeded blocks (#​1434)
• (transformer) Add JSX and React transforms (#​607)
• (minifier) Remove unused values without side effects (#​1493)
• (minifier) Rewrite conditionals, returns, and comparisons (#​1494)
• (minifier) Inline local constants and remove unused chains (#​1495)
• (transformer) Add optional catch binding transform (#​356)

🐛 Bug Fixes

• (parser) Parse decorated declare classes (#​1414)
• (type-strip) Erase decorators before exported declare classes (#​1415)
• (parser) Reject non-null assertions after postfix updates (#​1421)
• (type-strip) Preserve logical not in variable initializers (#​1442)
• (type-strip) Preserve vertical tabs in erased spans (#​1449)
• (website) Support minifier conformance snapshots (#​1451)
• (parser) Diagnose exponentiation operands hidden by assertions (#​1490)
• Correct JS parser benchmark configuration (#​1502)
• (type-strip) Diagnose unsafe erasure (#​1444)
• (parser) Accept keyword qualified types after line breaks (#​1508)
• (parser) Accept escaped binary-keyword class fields (#​1509)
• (parser) Respect import type argument line breaks (#​1510)
• (parser) [breaking] Support import attributes on ambient modules (#​1507)
• (parser) Reject unparenthesized assertions as assignment targets (#​1519)
• (parser) Keep pending comments leading before trailing line comments (#​1518)
• (ast) [breaking] Enforce Rust AST safety boundaries (#​1517)

🚜 Refactor

• (parser) Replace JSX lexer modes with explicit scanning (#​1491)
• (semantic) [breaking] Move regexp validation into the semantic builder (#​1506)

📚 Documentation

• (ci) Explain Clang cross-build setup (#​1411)
• (npm) Add package readmes (#​1501)
• File bulk static-analysis issues in swc-next-issues (#​1511)

⚡ Performance

• (parser) Return bare postfix expressions outside new callees (#​1417)
• (simd) Use SWAR in the scalar backend (#​1419)
• (parser) Detect TypeScript const enums after advancing past const (#​1428)
• (simd) Force-inline vector and mask operations (#​1426)
• (benchmark) Measure type stripping in paired wall time (#​1433)
• (benchmark) Measure minification in paired wall time (#​1435)
• (parser) Bound binding-pattern lookahead (#​1412)
• (ffi) Simplify FFI position mapping (#​1437)
• (decoder) Slice source-backed strings (#​1438)
• (ffi) Reduce FFI serialization bounds checks (#​1439)
• (type-strip) Read tokens on demand instead of collecting them (#​1422)
• (type-strip) Shorten the eraser traversal (#​1424)
• (simd) Avoid out-of-line calls in vector loads and the scalar backend (#​1443)
• (simd) Build scalar lanes from one u128 (#​1445)
• (codegen) Batch short ASCII runs in source maps (#​1496)
• (minifier) Group symbols by scope before sorting (#​1497)
• (codegen) Reuse the previous source mapping line (#​1500)
• (parser) Avoid quadratic assignment target validation (#​1492)

🧪 Testing

• (minifier) Update dead-code fixtures for current codegen output (#​1430)
• (minifier) Add terser and SWC minifier conformance suites (#​1450)
• (testsuite) Adapt to SWC compiler fixtures (#​1498)

⚙️ Miscellaneous Tasks

• (minifier) Comment on minified output size changes (#​1431)
• (benchmark) Measure only affected wall-time targets (#​1436)
• Compare pull requests with the merge commit parent (#​1441)
• (skills) Mark breaking changes in PR titles (#​1504)
• (skills) Clarify code review guidance (#​1512)
• (skills) Default code review to English (#​1514)

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