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In this tutorial we're going to build a set of parser combinators.

What is a parser combinator?

We'll answer the above question in 2 steps

1. what is a parser?
2. and.. what is a parser combinator?

So first question: What is parser?

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/**
 *  When manually subscribing to an observable in a view component, developers are traditionally required
 *  to unsubscribe during ngOnDestroy. This utility method auto-configures and manages that relationship
 *  by watching the DOM with a MutationObserver and internally using the takeUntil RxJS operator.
 *
 *  Angular 7 has stricter enforcements and throws errors with monkey-patching of view component life-cycle methods.
 *  Here is an updated version that uses MutationObserver to accomplish the  same goal.
 *
 *  @code
 *

rusev

import React from "react";
import ReactDOM from "react-dom";

import configureStore from "./store/configureStore";


const store = configureStore();


const rootEl = document.getElementById("root");

rusev

// @ts-check
"use strict"

/**
 * Set up datadog tracing. This should be called first, so Datadog can hook
 * all the other dependencies like `http`.
 */
function setUpDatadogTracing() {
  const { tracer: Tracer } = require('dd-trace')
  const tracer = Tracer.init({

rusev

// these aren't _quite_ functional tests,
// and should all be compile_fail,
// but may be illustrative

#[test]
fn concurrent_set() {
    use std::sync::Arc;
    let x = Arc::new(Cell::new(42));
    let x1 = Arc::clone(&x);
    std::thread::spawn(move || {

rusev

// identity mapped type
https://www.typescriptlang.org/play?#code/PTAEEsDsAcFcBcBQ8Ce0CmoDyAjAVqALygDeioFoAZgPY0BcoAzvAE5QDmANOZTgIatGkWAFsc6VogC+iRCGqxIAY3jgakZGkwBJACbpIa1AB4AKgD4ipXhQDaAaQiRQAa3QoaVUGYC6jM0dfGTkFZX4AGwitDFAAZX5RTGJ9Q2MUE1w8CyA
// promisify mapped type
https://www.typescriptlang.org/play?#code/C4TwDgpgBA8gRgKygXigbygMwPbYFxQDOwATgJYB2A5gDRRwCGJBFArgLZwQlQC+AUP1CQoABRLZ2ZQmUwgAPABUAfCnT8omqAG0A0lEpQA1hBDZMURQF0CACgCUKVeMnSISvVeX8BQ8NBcpGUwyCAATNUDpWQV4BG9+MIgAYwAbJmhk7ApiKBIwZIIo4NCwwSyc4CxWYFYSaFR85IA6RhIHQUwauohm4AALCApbWwA3BlTHZFU0DS1x1J97IA
// SatisfyName, get access to ur own key in the callback
https://www.typescriptlang.org/play?#code/PTAEDMFcDsGMBcCWB7aAoeBPADgU1AMoCGSAzuJgHJEC2uAPACoB8oAvKAN5qigDaAaVCJooANa5MycKEYBdAFygAFNFq4lAgJTtWAN2SIAJgG40AXzNojuWABsiAJ3xQ4SVKFIlE5TAHkAIwArW3hqOiZmZWRgpWIyCnCGFi0lA2MrLwT-YNCk5U5QEFBkSHhsMp5QIiVVdR02Vm4q3jU6M15zABoqgNq23AamltARgY7QbostEyA
// provideValue, just pairs of data and callbacks that get *their* data as an argument
https://www.typescript

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// Types
#define NULL 0
typedef unsigned char      u8;
typedef unsigned int       u32;
typedef signed int         i32;
typedef signed long long   i64;
typedef double             f64;


// Imports