bad_idea.js

class Throws<T> {
    constructor(public error?: T) {

    }
    then<S>(fn: () => Throws<S>): Throws<T | S> {
        if (this.error) {
            // already errored, don't attempt to run the next action
            return this; 
        }
        const result = fn();
        return result;
    }
    static resolve<T>(error?: T) {
        return new Throws<T>(error);
    }
};

let { error } = Throws.resolve<never>().then(() => {
    if (Math.random() > 0.5) {
        return Throws.resolve(new TypeError('lost'));
    }
}).then(() => {
    if (Math.random() > 0.5) {
        return Throws.resolve(new ReferenceError('Got a reference error'));
    }
    return Throws.resolve(new RangeError('range'));
}).then(() => {
    return Throws.resolve(new Error('Shouldn\'t get here!'))
});
typeof error; // TypeError | Error | ReferenceError