fix(parser): reject invalid index signature parameter types (TS1268/TS1337)#22852
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…S1337) (#22852) An index signature parameter type must be `string`, `number`, `symbol`, or a template literal type. This adds the syntactic check oxc was missing for the direct cases: interface I { [x: boolean]: number; } // now TS1268 interface I { [x: "a"]: number; } // now TS1337 The check accepts the valid key keywords (`string`/`number`/`symbol`/`any`) and rejects any other keyword type (via `TSType::is_keyword`) or a literal type; the single-parameter validation is folded into the same `match`. Non-keyword nodes (type references, unions, templates) need type resolution and remain a checker concern, so this is a conservative, regression-safe subset of the full rule. parser_typescript +1 negative-pass; positive/AST stay 100%.
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### 🚀 Features - 9c71f2e ast, codegen, formatter: Add `WithClauseKeyword::as_str` helper and use it (#22791) (camc314) ### 🐛 Bug Fixes - cf5769c parser: Reject TypeScript declarations in single-statement context (#22827) (Boshen) - c360fb6 parser: Reject generators in ambient contexts and overload signatures (TS1221/TS1222) (#22848) (Boshen) - cc60d8d parser: Reject invalid index signature parameter types (TS1268/TS1337) (#22852) (Boshen) - 3d13e29 parser: Reject `declare` in an already-ambient context (TS1038) (#22850) (Boshen) - 5152854 parser: Reject statements in ambient contexts (TS1036) (#22849) (Boshen) - 4f9afc5 parser: Reject `export as namespace` inside a namespace body (TS1316) (#22846) (Boshen) - 2eafea6 parser: Reject function implementations in ambient contexts (TS1183) (#22845) (Boshen) - c645615 parser: Reject incompatible class member modifiers (#22843) (Boshen) - 276b78b parser: Reject module-referencing imports/exports in a namespace body (#22836) (Boshen) - 842ed1c parser: Parse `class implements` with `implements` as the class name (#22801) (Boshen) ### ⚡ Performance - 7e3a567 parser: Reuse cached token kind in delimited-list loops (#22841) (Boshen) - 9e741c2 parser: Use peek_token instead of lookahead on the modifier path (#22842) (Boshen) - 9e496a7 semantic: Defer declare lookup for empty accessors (#22810) (camc314)
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An index signature parameter type must be
string,number,symbol, or atemplate literal type. This adds the syntactic check oxc was missing for the
direct cases:
The check accepts the valid key keywords (
string/number/symbol/any) andrejects any other keyword type (via
TSType::is_keyword) or a literal type; thesingle-parameter validation is folded into the same
match. Non-keyword nodes(type references, unions, templates) need type resolution and remain a checker
concern, so this is a conservative, regression-safe subset of the full rule.
parser_typescript +1 negative-pass; positive/AST stay 100%.