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package avl

type Compareable interface {
    Compare(Compareable) int8 // 0 equal, -1 less than, 1 greater than
}

type Node struct {
    Data    []Compareable // duplicates allowed, data stored as array
    Balance int8 // negative left heavy, positive right heavy
    Link    [2]*Node // 0 left, 1 right

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function ctoi(x, y) {
    return {
        x: x-y,
        y: (x+y)/2,
    }
}

function itoc(x, y) {
    return {
        x: (2*y+x)/2,

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This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit

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const UINT32_MAX_VALUE = 0xFFFFFFFF

class BigNum {
    private _positive!: boolean
    private _limbs!: Uint32Array

    constructor(positive: boolean | string = true, limbs: Uint32Array | number[] = []) {
        if (typeof positive === 'string') {
            return BigNum._fromString(positive)
        }

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/*
expression  = term {('+' | '-') term}
term        = factor {('*' | '/') factor}
factor      = base ['^' factor]
base        = ['-'] value
value       = number | '(' expression ')'
number      = integer ['.' fractional]
integer     = '0' | onenine {digit}
fractional  = digit {digit}
onenine     = digit - '0'

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[
    main() {
        return print(fib(10))
    }

    fib(n) {
        if (n == 0) {
            return 0
        } else if (n == 1) {
            return 1

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/**
 * Frazier's Object Modeling Language (FOML)
 * 
 * FOML is a superset of JSON with...
 *   1. Bash style comments
 *   2. Root object curley braces are optional (each FOML document describes a single object)
 *   3. End of line commas are optional, trailing commas are allowed
 *   4. Colon (:) and equal (=) are interchangeable
 *   5. Colon/equal is optional for object and array assignment
 *   6. Simple property names do not require quotes (alphanumeric and _-.$@ characters only)

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const make_regexp = function(str, fl) {
    return new RegExp(str.replace(/\s/g, ''), fl)
}

const rx_number = make_regexp(`^(?:
    0   (?:
            b [01]+
        |   o [0-7]+
        |   x [0-9 A-F]+
        |   \\. [0-9]+ (?: e [+\\-]? [0-9]+ )?

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const operations = {
    '+': {
        precedence: 1,
        handler: (x, y) => x + y,
    },

    '-': {
        precedence: 1,
        handler: (x, y) => x - y,
    },

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class AnimationLoop {
    constructor({ update, render, panic, tickRate = 30, autoPause = true }) {
        this.update = update
        this.render = render
        this.panic = panic ?? (() => this.delta = 0)
        this.frameID = null
        this.lastFrameMs = 0
        this.lastFpsMs = 0
        this.frameCount = 0
        this.fps = 60