"anonymous abstract function" with symbol-identified methods

The following code:

export interface AccessorBase<T> {
    readonly $accessPath: AccessPath<any, T>;
    readonly $parent: ObjectAccessor<{}> | ListAccessor<object> | undefined;

    [accessPathSymbol](): AccessPath<any, T>;
}

generates the error anonymous abstract function. This is most likely the case because propertyName only considers identifiers and string literals, and not symbols. I have not checked, but I would gess ['methodName'](): string causes the same error.

The problem has been introduced in version 0.33.0 - 0.32.1 works.

[ayazhafiz]

@ayazhafiz

[ribrdb]

Is this really inexpressible in closure? How is it different from the Symbol methods in https://github.com/google/closure-compiler/blob/50713dceb16b369f8f317e5b49e8a9dec2b47496/externs/es6_collections.js

Couldn’t you just do

/** @returns {AccessPath<*,T>}*/
AccessorBase.prototype[accessPathSymbol] = function();

I tried manually generating this code and the closure compiler seems to accept it. So I think you could fix this in tsickle/src/jsdoc_transformer.ts: If fnDecl.name.kind == ts.SyntaxKind.ComputedPropertyName, use ts.createElementAccess(instancePropAccess, fnDecl.name.expression) instead of ts.createPropertyAccess(instancePropAccess, name)