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fix(ast): remove ThisExpression from TSModuleReference#18489

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fix/tighten-ast-ts-import-equals
Jan 24, 2026
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fix(ast): remove ThisExpression from TSModuleReference#18489
graphite-app[bot] merged 1 commit intomainfrom
fix/tighten-ast-ts-import-equals

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@Boshen Boshen commented Jan 24, 2026

Summary

  • Removes ThisExpression variant from TSModuleReference since import x = this is invalid TypeScript (error TS1359)
  • Adds parser error when this is used in import equals declaration
  • Updates codegen, transformer, and linter rules to handle the new enum structure

Closes #16841

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@github-actions github-actions bot added A-linter Area - Linter A-parser Area - Parser A-cli Area - CLI A-ast Area - AST A-transformer Area - Transformer / Transpiler A-codegen Area - Code Generation A-formatter Area - Formatter A-linter-plugins Area - Linter JS plugins C-bug Category - Bug labels Jan 24, 2026
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Pull request overview

This pull request tightens the AST definition of TSModuleReference by removing the invalid ThisExpression variant. The change aligns the AST with TypeScript's actual grammar, which does not allow import x = this (TypeScript error TS1359).

Changes:

  • Removed ThisExpression variant from TSModuleReference enum and reordered discriminants
  • Added parser error when this keyword is used in import equals declarations
  • Updated all code that handles TSModuleReference across codegen, transformer, formatter, visitors, and linter rules

Reviewed changes

Copilot reviewed 7 out of 36 changed files in this pull request and generated no comments.

Show a summary per file
File Description
crates/oxc_ast/src/ast/ts.rs Removed ThisExpression variant from TSModuleReference enum and updated discriminants
crates/oxc_parser/src/ts/statement.rs Added parse_ts_module_reference method with explicit check for invalid this keyword
tasks/coverage/misc/fail/import-equals-this.ts New test file for invalid import x = this syntax
tasks/coverage/snapshots/*.snap Updated test snapshots to reflect new parser error
crates/oxc_transformer/src/typescript/module.rs Refactored to handle IdentifierReference and QualifiedName separately instead of using match_ts_type_name! macro
crates/oxc_codegen/src/gen.rs Updated to handle each variant explicitly
crates/oxc_linter/src/rules/**/*.rs Removed ThisExpression from pattern matches
crates/oxc_formatter/src/ast_nodes/generated/*.rs Updated to handle each variant explicitly
crates/oxc_ast_visit/src/generated/*.rs Updated visitor implementations to handle each variant explicitly
crates/oxc_traverse/src/generated/walk.rs Updated walk implementation to handle each variant explicitly
crates/oxc_ast/src/generated/*.rs Updated all generated derive implementations
crates/oxc_ast/src/generated/ast_builder.rs Added new builder methods for TSModuleReference variants
npm/oxc-types/types.d.ts Updated TypeScript type definition
apps/oxlint/src-js/generated/*.js Updated all generated JavaScript files with corrected discriminants
napi/parser/src-js/generated/**/*.js Updated all generated JavaScript files with corrected discriminants

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@Boshen Boshen added the 0-merge Merge with Graphite Merge Queue label Jan 24, 2026
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@Boshen
fix(ast): remove ThisExpression from TSModuleReference (#18489)
c205b0d 
## Summary

- Removes `ThisExpression` variant from `TSModuleReference` since `import x = this` is invalid TypeScript (error TS1359)
- Adds parser error when `this` is used in import equals declaration
- Updates codegen, transformer, and linter rules to handle the new enum structure

Closes #16841

🤖 Generated with [Claude Code](https://claude.com/claude-code)
@graphite-app graphite-app bot force-pushed the fix/tighten-ast-ts-import-equals branch from 1c0d544 to c205b0d Compare January 24, 2026 15:25
@graphite-app graphite-app bot merged commit c205b0d into main Jan 24, 2026
22 checks passed
@graphite-app graphite-app bot deleted the fix/tighten-ast-ts-import-equals branch January 24, 2026 15:30
@graphite-app graphite-app bot removed the 0-merge Merge with Graphite Merge Queue label Jan 24, 2026
This was referenced Jan 26, 2026
Merged
Merged
overlookmotel pushed a commit that referenced this pull request Jan 26, 2026
@Boshen
release(crates): oxc v0.111.0 (#18572)
9951f16 
### 💥 BREAKING CHANGES

- 22dec6a semantic: [**BREAKING**] Remove
`Scoping::scope_build_child_ids` and all related APIs (#18362) (Dunqing)
- 30a4899 oxc: [**BREAKING**] Remove
`CompilerInterface::semantic_child_scope_ids` (#18361) (Dunqing)
- 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen)
- af0ca46 span: [**BREAKING**] Use `ModuleKind::CommonJS` for
`SourceType::cjs()` (#18276) (sapphi-red)

### 🚀 Features

- 0a02026 semantic: Add TS1499 code to diagnostic (#18557) (camc314)
- 8b4618f parser: Add TS1500 code to diagnostic (#18547) (camc314)
- 866b6b3 parser: Add TS1048 code to diagnostic (#18546) (camc314)
- 1117c44 parser: Add TS1054 code to diagnostic (#18541) (camc314)
- e4fcdde semantic: Add TS1053 code to diagnostic (#18539) (camc314)
- bcbf396 semantic: Add TS1052 code to diagnostic (#18538) (camc314)
- 8155edf semantic: Add TS1049 code to diagnostic (#18535) (camc314)
- 51d3b3f parser: Add TS1502 code to diagnostic (#18534) (camc314)
- 00854e8 semantic: Add TS2337 error code to super call diagnostic
(#18531) (camc314)
- 993fd2b parser: Parse unambiguous await with better error messages
(#18480) (Boshen)
- 8db0e78 linter/plugins: Handle BOMs (#18376) (overlookmotel)
- 6ac09e2 linter/plugins: Support source text not being at start of
buffer (#18375) (overlookmotel)
- 2ef5647 ast: Add escape_raw parameter to template_element builders
(#18121) (Boshen)

### 🐛 Bug Fixes

- 74d0998 semantic: Update error msg for multiple `default` cases in
switch stmt (#18526) (camc314)
- c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489)
(Boshen)
- aed3669 parser: Parse HTML-like comments in unambiguous mode (#18442)
(Boshen)
- c4132fb parser: Validate accessor parameters in interface method
signatures (#18391) (Boshen)
- b0cd74d semantic: Allow `var` and `function` with same name in static
blocks (#18358) (Boshen)
- 6037995 semantic: Allow `new.target` in class field initializers
(#18349) (Boshen)
- 9a15c6a semantic: Do not rely on spans for node comparison in
`Function::bind` (#18296) (overlookmotel)

### ⚡ Performance

- 6b600c4 semantic: Skip parent lookup for function declarations in
`Function::bind` (#18293) (overlookmotel)
- c27ad2d semantic: Move check for function declaration out of
`is_function_part_of_if_statement` (#18292) (overlookmotel)
- 63eb89e semantic: Skip checking redeclarations for function
expressions (#18291) (overlookmotel)
- 7c12743 semantic: Skip checking unresolved exports in CommonJS files
(#18250) (overlookmotel)
- 2349031 allocator: Increase initial chunk size from 512B to 16KB
(#18234) (Boshen)

### 📚 Documentation

- 8ccd853 npm: Update package homepage URLs and add keywords (#18509)
(Boshen)
- 9b3165f napi/parser: Clarify when to use `parseAsync` vs `parseSync`
(#18486) (Boshen)
- 1b59f63 napi/parser: Correct typo in README (#18251) (overlookmotel)
- 00ff75f mangler: Fix `top_level` option in example (#18233)
(overlookmotel)
- 2ddc073 semantic: Fix typo in comment (#18238) (overlookmotel)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
overlookmotel pushed a commit that referenced this pull request Jan 26, 2026
@Boshen
release(apps): oxlint v1.42.0 && oxfmt v0.27.0 (#18573)
e99215e 
# Oxlint
### 💥 BREAKING CHANGES

- 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen)

### 🚀 Features

- 34c3ec3 linter/prefer-logical-operator-over-ternary: Implement fixer
(#18545) (camc314)
- 019e0aa linter/valid-typeof: Add suggestions if type is misspelled
(#18543) (camchenry)
- 704c8eb linter/use-isnan: Add more specific error message for
equality/inequality (#18542) (camchenry)
- 1e99ace linter/use-isnan: Support more `indexOf` cases and improve
diagnostic messages (#18537) (camchenry)
- bffd134 linter/text-encoding-identifier-case: Add `withDash` option
(#18533) (camc314)
- 993fd2b parser: Parse unambiguous await with better error messages
(#18480) (Boshen)
- b4b6247 linter/plugins: `RuleTester` support settings (#18445)
(overlookmotel)
- 15d69dc linter: Implement react/display-name rule (#18426) (camchenry)
- 2fbceae linter: Implement rule docs and config support for rules with
tuple config options. (#18372) (connorshea)
- 8db0e78 linter/plugins: Handle BOMs (#18376) (overlookmotel)
- 6ac09e2 linter/plugins: Support source text not being at start of
buffer (#18375) (overlookmotel)
- fc3c86b linter: Update 125 rules to raise errors when provided with
invalid config options. (#18104) (connorshea)
- 2cc6ad2 linter/plugins: Add `ecmaFeatures` to `parserOptions` (#18313)
(overlookmotel)

### 🐛 Bug Fixes

- 2acf568 linter/plugins: Keep `Infinity` in rule default options
(#18550) (overlookmotel)
- 332d2ef linter/plugins: Add `jsx` property to
`parserOptions.ecmaFeatures` (#18549) (overlookmotel)
- 7d9bb1b linter: Update `eslint/func-names` to error on invalid rule
config options, improve docs. (#18510) (connorshea)
- 9c67974 linter: Improve the jsx-a11y/no-noninteractive-tabindex rule
to match original rule logic better (#17848) (connorshea)
- 75e7163 vscode: Support json5 for oxfmt (#18502) (Sysix)
- c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489)
(Boshen)
- c51339a oxlint/lsp: Respect code action `source.fixAll` as an alias
for `source.fixAll.oxc` (#18366) (Sysix)
- 3c0e9b9 oxlint/lsp: Skip dangerous fixes/suggestions for "fix all"
code action and command (#18364) (Sysix)
- c44c093 linter: Fix behavior of unicorn/catch-error-name to match
original rule (#18209) (connorshea)
- 9c65aff linter/jsx-a11y: Change `no-autofocus` autofix to suggestion
(#18155) (Ben Lowery)
- 235c820 linter/unicorn: Fix `prefer-array-some` autofix for
`.filter().length` pattern (#18153) (Ben Lowery)
- a9925dc linter: Mark fixes in `unicorn/no-null` rule as dangerous.
(#18436) (connorshea)
- cee29b4 linter: Remove confusing scope from
`react/only-export-components` rule diagnostics. (#18434) (connorshea)
- aed3669 parser: Parse HTML-like comments in unambiguous mode (#18442)
(Boshen)
- b8a371d linter: Fix the path used in the gitlab format output (#18165)
(connorshea)
- e046ea6 linter: `vue/no-lifecycle-after-await` skip looking into arrow
functions (#18302) (Sysix)
- a9bfbcf linter: Compatibility issue with `DiagnosticData` type in
ESLint (#18396) (루밀LuMir)
- 10ab424 linter: `react/no_array_index_key` continue search for other
attributes (#18409) (Lonami)
- 9d776d4 linter: Update `import/no-cycle` rule to error on invalid
config options. (#18330) (connorshea)
- c163231 linter: Update eslint/sort-imports to validate options.
(#18378) (connorshea)
- 79bbcff linter: Update `eslint/func-style` to error on invalid
configuration options. (#18390) (connorshea)
- b871235 linter/plugins: Fix identifying "use strict" directives in
scope analysis (#18402) (overlookmotel)
- 5985141 linter: Update `jest/prefer-lowercase-title` rule to error on
invalid config options. (#18332) (connorshea)
- faca4b5 linter/plugins: Tokenize `let`, `static` and `yield` as
`Keyword`s (#18368) (overlookmotel)
- a3914fd linter/plugins: Allow line number passed to `report` to be 1
over line count (#18341) (overlookmotel)
- 88e0896 linter: Update `typescript/no-restricted-types` rule to error
on invalid config options. (#18329) (connorshea)
- 9eec600 linter: Update `react/jsx-fragments` rule to raise an error on
invalid configuration options (#18111) (connorshea)
- 0fa969d linter: Update `react/no-will-update-set-state` to error on
invalid config options (#18112) (connorshea)
- 70e7be4 linter: Update `import/no-unassigned-import` to raise an error
when passed invalid config options. (#18108) (connorshea)
- 496cac7 linter: Update `unicorn/explicit-length-check` to raise an
error when passed invalid config options. (#18107) (connorshea)
- 080b1ec linter: Update 5 more rules to error on invalid config
options. (#18113) (connorshea)
- c5d05dd linter: Update 11 rules to raise an error on invalid config
options. (#18109) (connorshea)
- 9e359d4 linter/plugins: Set all properties on global vars objects
(#18317) (overlookmotel)
- 39c7f32 linter/plugins: Set `writeable` flag on variables where
defined as globals (#18316) (overlookmotel)
- a570693 linter/plugins: Fix `CatchClause` scopes (#18312)
(overlookmotel)
- 8c98e69 linter: `vitest/prefer-describe-function-title`: Check earlier
to avoid false positive (#18177) (Jovi De Croock)
- 44be0eb linter/plugins: Set scope analyse settings based on source
type (#18306) (overlookmotel)
- b9a14fd vscode: Update package.json to restrict a few more config
options. (#18270) (Connor Shea)
- c1260cb vscode: Update version info formatting. (#18274) (connorshea)
- 2f68dc6 vscode: Update notification for client restart to specify
tool. (#18273) (connorshea)

### ⚡ Performance

- dc931ba linter/no-inner-declarations: Skip scope flags lookup in
modules (#18249) (overlookmotel)
- 07618a7 linter: Turn off `scope_build_child_ids` for SemanticBuilder
(#18360) (Dunqing)
- 1aac079 linter/exhaustive-deps: Simplify the logic of checking if the
identifier it is a dependency of hook (#18350) (Dunqing)
- 591d522 linter/block-scoped-var: Avoid `iter_all_scope_child_ids` by
walking references/redeclarations scope ancestors (#18335) (Dunqing)
- 2eefd6d linter/plugins: Remove branch from token parsing (#18369)
(overlookmotel)

### 📚 Documentation

- 698c21d linter: Modernize docs for various React rules (#18559)
(connorshea)
- 314a47c linter: Clarify the `no-find-dom-node` rule with a note that
the method was removed in React 19. (#18556) (connorshea)
- 5eff704 linter: Update `no-inner-declarations` to fix config option
docs (#18511) (connorshea)
- dd5d2f6 linter: Improve diagnostic message in `valid_typeof` rule.
(#18507) (connorshea)
- 8ccd853 npm: Update package homepage URLs and add keywords (#18509)
(Boshen)
- 4958233 linter: Add missing "What it does" section in
prefer-reflect-apply rule. (#18475) (connorshea)
- 2fa83a4 linter: Improve the docs for import/unambiguous. (#18474)
(connorshea)
- 7b1505c linter: Improve docs for `oxc/only-used-in-recursion` rule.
(#18473) (connorshea)
- ab506d6 linter/plugins: Correct comment (#18456) (overlookmotel)
- 4565c73 linter: `react/display-name`: add docs for config options
(#18430) (camchenry)
- b95a89f linter: Fix docs for the curly rule. (#18374) (connorshea)
- f675eb4 linter: Fix the `react/only-export-components` rule docs.
(#18319) (connorshea)
- 704db95 linter: "no-unused-vars" extend ignored files section for
svelte and astro files (#18304) (Sysix)
- 3af4a88 linter: Add "Examples" headers to rules missing them (#18266)
(connorshea)
# Oxfmt
### 💥 BREAKING CHANGES

- 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen)

### 🚀 Features

- d71c15d oxfmt: Enable tailwind sort inside xxx-in-js (#18417)
(leaysgur)
- 52b5003 formatter,oxfmt: Support Angular `@Component({ template,
styles })` (#18324) (leaysgur)

### 🐛 Bug Fixes

- 224140c oxfmt: Canonicalize `..` component in config path (#18570)
(leaysgur)
- 30b467e formatter: Preserve trailing comments before the semicolon in
class methods without a body (#18446) (Dunqing)
- c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489)
(Boshen)
- 164bbd7 formatter: Preserve trailing comments inside ternary alternate
branch (#18433) (Dunqing)
- 1c50800 formatter: Use HTML entity escaping for JSX attribute strings
(#18385) (Boshen)
- 4e156d2 formatter: Preserve parentheses for `in` expressions in arrow
function block bodies (#18352) (Boshen)
- 7e6c15b oxfmt: Increase Tailwind CSS test timeout for Windows CI
(#18339) (Boshen)
- 29966eb formatter/dead-code-removal: Handle tailwind sorting (#18321)
(leaysgur)
- 29f41be formatter: Only expand mapped types when newline immediately
follows opening brace (#18087) (Boshen)
- 2194552 formatter: Relocate leading comments for single-element
union/intersection types (#18083) (Boshen)

### ⚡ Performance

- 85ab400 formatter: Store `AstNodes` itself instead of `&'a AstNodes`
as the `parent` field of `AstNode` (#18428) (Dunqing)
- 194d384 formatter: Reduce AstNode size by 8 bytes using
following_span_start (#18347) (Dunqing)
- b2df8fb oxfmt: Enable tailwind plugin only for relevant parser
(#18418) (leaysgur)

### 📚 Documentation

- 8ccd853 npm: Update package homepage URLs and add keywords (#18509)
(Boshen)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
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ast: tighten AST around TSImportEqualsDeclaration

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