Behavior difference: Inline comment on arrow function parameters is emitted on tsc but not on tsgo

[hkleungai]

Right now tsc will strip inline comment on the last parameter, but it is still printing (useful) comments on other lines. But still, I think these inline comments should be retained in tsgo.

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Steps to reproduce

1. Start a plain new project
   • "@typescript/native-preview": "7.0.0-dev.20260523.1",
   • "typescript": "6.0.3"
2. Run npx tsgo --init to get the default tsconfig. Turn on these flags as well.
   • "stableTypeOrdering": true,
3. Add src/main.js. Run npx tsc --noEmit & npx tsgo --noEmit to see the difference.

// src/main.ts
export const fn = (
    foo: boolean, // comment on foo
    bar: string, // comment on bar
    buzz: number,  // comment on buzz
) => {}

Behavior with typescript@6.0

export declare const fn: (foo: boolean, // comment on foo
bar: string, // comment on bar
buzz: number) => void;
//# sourceMappingURL=main.d.ts.map

Behavior with tsgo

export declare const fn: (foo: boolean, bar: string, buzz: number) => void;
//# sourceMappingURL=main.d.ts.map