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/// <reference no-default-lib="true"/>

/// <reference lib="es2018.asynciterable" />

interface AsyncGenerator<T = unknown, TReturn = any, TNext = unknown> extends AsyncIterator<T, TReturn, TNext> {
    // NOTE: 'next' is defined using a tuple to ensure we report the correct assignability errors in all places.
    next(...args: [] | [TNext]): Promise<IteratorResult<T, TReturn>>;
    return(value: TReturn | PromiseLike<TReturn>): Promise<IteratorResult<T, TReturn>>;
    throw(e: any): Promise<IteratorResult<T, TReturn>>;
    [Symbol.asyncIterator](): AsyncGenerator<T, TReturn, TNext>;
}

interface AsyncGeneratorFunction {
    /**
     * Creates a new AsyncGenerator object.
     * @param args A list of arguments the function accepts.
     */
    new (...args: any[]): AsyncGenerator;
    /**
     * Creates a new AsyncGenerator object.
     * @param args A list of arguments the function accepts.
     */
    (...args: any[]): AsyncGenerator;
    /**
     * The length of the arguments.
     */
    readonly length: number;
    /**
     * Returns the name of the function.
     */
    readonly name: string;
    /**
     * A reference to the prototype.
     */
    readonly prototype: AsyncGenerator;
}

interface AsyncGeneratorFunctionConstructor {
    /**
     * Creates a new AsyncGenerator function.
     * @param args A list of arguments the function accepts.
     */
    new (...args: string[]): AsyncGeneratorFunction;
    /**
     * Creates a new AsyncGenerator function.
     * @param args A list of arguments the function accepts.
     */
    (...args: string[]): AsyncGeneratorFunction;
    /**
     * The length of the arguments.
     */
    readonly length: number;
    /**
     * Returns the name of the function.
     */
    readonly name: string;
    /**
     * A reference to the prototype.
     */
    readonly prototype: AsyncGeneratorFunction;
}