TypeScript/tests/baselines/reference/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.types at 955d8e0ee2cb4e9fbc8753a9b510010e7c6cbf91 · Andarist/TypeScript · GitHub

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//// [tests/cases/conformance/expressions/nullishCoalescingOperator/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts] ////

=== nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts ===
// https://github.com/microsoft/TypeScript/issues/61109

class Cls {
>Cls : Cls
>    : ^^^

  #privateProp: number | undefined;
>#privateProp : number | undefined
>             : ^^^^^^^^^^^^^^^^^^

  problem() {
>problem : () => void
>        : ^^^^^^^^^^

    this.#privateProp ??= false ? neverThis() : 20;
>this.#privateProp ??= false ? neverThis() : 20 : number
>                                               : ^^^^^^
>this.#privateProp : number | undefined
>                  : ^^^^^^^^^^^^^^^^^^
>this : this
>     : ^^^^
>false ? neverThis() : 20 : 20
>                         : ^^
>false : false
>      : ^^^^^
>neverThis() : never
>            : ^^^^^
>neverThis : () => never
>          : ^^^^^^
>20 : 20
>   : ^^
  }
}

function neverThis(): never {
>neverThis : () => never
>          : ^^^^^^

  throw new Error("This should really really never happen!");
>new Error("This should really really never happen!") : Error
>                                                     : ^^^^^
>Error : ErrorConstructor
>      : ^^^^^^^^^^^^^^^^
>"This should really really never happen!" : "This should really really never happen!"
>                                          : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
}