Enum type exported to TypeScript, but not used in params

[benma]

Describe the Bug

#[wasm_bindgen]
pub enum Foo {
    A = 1,
    B = 2,
}

#[wasm_bindgen]
pub async fn foo(foo: Foo) -> Result<(), ()> {
   // ... 
}

Produces this TypeScript:

export enum Foo {
  A = 1,
  B = 2,
}
export function foo(foo: number): void

Expected Behavior

I expected the function to be exported as:

export function foo(foo: Foo): void

[Stefan-Hanke]

Looks like a duplicate to #2154

[daxpedda]

Duplicate of #2154.