Intellisense does not work with [P in keyof T]

TypeScript Version: 2.1.5

Code

//Operators available for the object fields
export type Operators<T> = {
    $elementMatch?: T | Operators<T>;
    $in?: T[];
}

//Filter declaration. 
export type Filter<T> = {
    //field, you can assign a value, or an operator.
    [P in keyof T]: Operators<T[P]> | T[P];
}

function query<T>(filter: Filter<T>) {  }

//Sample class
class Sample {
    foo: string;
    bar: number;
}

query<Sample>({
    //We want to put on the "foo" operator "$in"
    value: {
        //Intellisense then no output
    }
});

Expected behavior:
Intellisense should display all available options.
For example:
$elementMatch
$in

Actual behavior:
Intellisense does not offer anything.
If the "[P in key of T]" is replaced by "[key: string]", then the Intellisense for operators begins to work, but in this case we lose the test fields.

Reproduce el fallo de IntelliSense usando el ejemplo de TypeScript 2.1.5 con Operators, Filter y query. Empieza rastreando el procesamiento de completado para el tipo mapeado [P in keyof T]; la tarea estará terminada cuando las opciones $elementMatch y $in aparezcan dentro del objeto de operadores sin perder las comprobaciones de los campos mapeados.