feat: implement simple env + ts loader

src/lib/libs/_entry.ts

@@ -0,0 +1,56 @@
+import { Boolean } from "./boolean.ts";
+import { Error, RangeError, SyntaxError, TypeError } from "./errors.ts";
+import { Function } from "./function.ts";
+import { Number } from "./number.ts";
+import { Object } from "./object.ts";
+import { object, setGlobalPrototypes, target } from "./primordials.ts";
+import { String } from "./string.ts";
+import { Symbol } from "./symbol.ts";
+import { Array } from "./array.ts";
+import { Map } from "./map.ts";
+import { RegExp } from "./regex.ts";
+
+declare global {
+	function print(...args: any[]): void;
+}
+
+object.defineField(target, "undefined", false, false, false, undefined);
+
+target.Symbol = Symbol;
+target.Number = Number;
+target.String = String;
+target.Boolean = Boolean;
+
+target.Object = Object;
+target.Function = Function;
+target.Array = Array;
+
+target.Error = Error;
+target.RangeError = RangeError;
+target.SyntaxError = SyntaxError;
+target.TypeError = TypeError;
+
+target.Map = Map;
+
+target.parseInt = Number.parseInt;
+target.parseFloat = Number.parseFloat;
+target.NaN = Number.NaN;
+target.Infinity = Number.POSITIVE_INFINITY;
+
+
+target.RegExp = RegExp;
+
+setGlobalPrototypes({
+	string: String.prototype,
+	number: Number.prototype,
+	boolean: Boolean.prototype,
+	symbol: Symbol.prototype,
+	object: Object.prototype,
+	array: Array.prototype,
+	function: Function.prototype,
+	error: Error.prototype,
+	syntax: SyntaxError.prototype,
+	range: RangeError.prototype,
+	type: TypeError.prototype,
+	regex: RegExp,
+});

src/lib/libs/array.ts

@@ -0,0 +1,53 @@
+import { func, object } from "./primordials.ts";
+import { Symbol } from "./symbol.ts";
+
+export const Array = (() => {
+	class Array {
+		public forEach(this: any[], cb: (val: any, i: number, self: this[]) => void, self?: any) {
+			for (let i = 0; i < this.length; i++) {
+				if (i in this) func.invoke(cb, self, [this[i], i, this]);
+			}
+		}
+
+		public [Symbol.iterator](this: any[]) {
+			let i = 0;
+			let arr: any[] | undefined = this;
+
+			return {
+				next() {
+					if (arr == null) return { done: true, value: undefined };
+					if (i > arr.length) {
+						arr = undefined;
+						return { done: true, value: undefined };
+					}
+					else {
+						const val = arr[i++];
+						if (i >= arr.length) arr = undefined;
+						return { done: false, value: val };
+					}
+				},
+				[Symbol.iterator]() { return this; }
+			};
+		}
+
+		public constructor (len: unknown) {
+			if (arguments.length === 1 && typeof len === "number") {
+				const res: any[] = [];
+				res.length = len;
+				return res as any;
+			}
+			// TODO: Implement spreading
+			else throw new Error("Spreading not implemented");
+		}
+
+		public static isArray(val: any[]) {
+			object.isArray(val);
+		}
+	}
+
+	func.setCallable(Array, true);
+	func.setConstructable(Array, true);
+
+	return Array as any as typeof Array & ((value?: unknown) => object);
+})();
+export type Array = InstanceType<typeof Array>;

src/lib/libs/boolean.ts

@@ -0,0 +1,29 @@
+import { func } from "./primordials.ts";
+import { unwrapThis, valueKey } from "./utils.ts";
+
+export const Boolean = (() => {
+	class Boolean {
+		[valueKey]!: boolean;
+
+		public toString() {
+			return "" + unwrapThis(this, "boolean", Boolean, "Boolean.prototype.toString");
+		}
+		public valueOf() {
+			return unwrapThis(this, "boolean", Boolean, "Boolean.prototype.valueOf");
+		}
+	
+		public constructor(value?: unknown) {
+			if (func.invokeType(arguments, this) === "call") {
+				if (arguments.length === 0) return false as any;
+				else return !!value as any;
+			}
+			this[valueKey] = (Boolean as any)(value);
+		}
+	};
+
+	func.setCallable(Boolean, true);
+	func.setConstructable(Boolean, true);
+
+	return Boolean as any as typeof Boolean & ((value?: unknown) => symbol);
+})();
+export type Boolean = InstanceType<typeof Boolean>;

src/lib/libs/errors.ts

@@ -0,0 +1,39 @@
+import { func, object } from "./primordials.ts";
+import { String } from "./string.ts";
+
+export class Error {
+	public declare name: string;
+	public declare message: string;
+
+	public toString() {
+		let res = this.name || "Error";
+		const msg = this.message;
+
+		if (msg) res += ": " + msg;
+		return res;
+	}
+
+	public constructor (msg = "") {
+		if (func.invokeType(arguments, this) === "call") return new Error(msg);
+		this.message = String(msg);
+	}
+}
+object.defineField(Error.prototype, "name", true, false, true, "Error");
+object.defineField(Error.prototype, "message", true, false, true, "");
+func.setCallable(Error, true);
+func.setConstructable(Error, true);
+
+export class SyntaxError extends Error { }
+object.defineField(SyntaxError.prototype, "name", true, false, true, "SyntaxError");
+func.setCallable(SyntaxError, true);
+func.setConstructable(SyntaxError, true);
+
+export class TypeError extends Error { }
+object.defineField(TypeError.prototype, "name", true, false, true, "TypeError");
+func.setCallable(TypeError, true);
+func.setConstructable(TypeError, true);
+
+export class RangeError extends Error { }
+object.defineField(RangeError.prototype, "name", true, false, true, "RangeError");
+func.setCallable(RangeError, true);
+func.setConstructable(RangeError, true);

src/lib/libs/function.ts

@@ -0,0 +1,61 @@
+import { compile, func, string } from "./primordials.ts";
+import { String } from "./string.ts";
+
+export const Function = (() => {
+	class Function {
+		declare public readonly name: string;
+		declare public readonly length: number;
+
+		public toString(this: Function) {
+			if (this.name !== "") return "function " + this.name + "(...) { ... }";
+			else return "function (...) { ... }";
+		}
+		public valueOf() {
+			return this;
+		}
+
+		public apply(this: (...args: any) => any, self: any, args: any[]) {
+			return func.invoke(this, self, args);
+		}
+		public call(this: (...args: any) => any, self: any, ...args: any[]) {
+			return func.invoke(this, self, args);
+		}
+
+		public constructor (...args: string[]) {
+			const parts = ["(function anonymous("];
+			for (let i = 0; i < arguments.length - 1; i++) {
+				if (i > 0) parts[parts.length] = ",";
+				parts[parts.length] = arguments[i];
+			}
+			parts[parts.length] = "){\n";
+			parts[parts.length] = String(arguments[arguments.length - 1]);
+			parts[parts.length] = "\n})";
+			var res = compile(string.stringBuild(parts))();
+			return res;
+		}
+
+		public static compile(src = "", { globals = [], wrap = false }: { globals?: string[], wrap?: boolean } = {}) {
+			const parts = [];
+
+			if (wrap) parts[parts.length] = "return (function() {\n";
+			if (globals.length > 0) {
+				parts[parts.length] = "let {";
+				for (let i = 0; i < globals.length; i++) {
+					if (i > 0) parts[parts.length] = ",";
+					parts[parts.length] = globals[i];
+				}
+				parts[parts.length] = "} = arguments[0];";
+			}
+			parts[parts.length] = src;
+			if (wrap) parts[parts.length] = "\n})(arguments[0])";
+
+			const res = compile(string.stringBuild(parts));
+			return res;
+		}
+	}
+
+	func.setCallable(Function, true);
+	func.setConstructable(Function, true);
+
+	return Function as any as typeof Function & ((value?: unknown) => (...args: any[]) => any);
+})();

src/lib/libs/map.ts

@@ -0,0 +1,61 @@
+import { func, map } from "./primordials.ts";
+import { Symbol } from "./symbol.ts";
+
+const mapKey: unique symbol = Symbol("Map.impl") as any;
+
+export class Map<K, V> {
+	private [mapKey]: InstanceType<typeof map>;
+
+	public get(key: K): V {
+		return this[mapKey].get(key);
+	}
+	public has(key: K): boolean {
+		return this[mapKey].has(key);
+	}
+	public set(key: K, val: V) {
+		this[mapKey].set(key, val);
+		return this;
+	}
+	public delete(key: K): boolean {
+		if (!this[mapKey].has(key)) return false;
+		else {
+			this[mapKey].delete(key);
+			return true;
+		}
+	}
+
+	public keys(): K[] {
+		return this[mapKey].keys();
+	}
+	public values(): V[] {
+		const res = this[mapKey].keys();
+		for (let i = 0; i < res.length; i++) {
+			res[i] = this[mapKey].get(res[i]);
+		}
+		return res;
+	}
+	public entries(): [K, V][] {
+		const res = this[mapKey].keys();
+		for (let i = 0; i < res.length; i++) {
+			res[i] = [res[i], this[mapKey].get(res[i])];
+		}
+		return res;
+	}
+
+	public [Symbol.iterator](): Iterator<[K, V]> {
+		return func.invoke(Array.prototype[Symbol.iterator as any], this.entries(), []) as any;
+	}
+
+	public constructor(iterable?: Iterable<[K, V]>) {
+		const _map = this[mapKey] = new map();
+
+		if (iterable != null) {
+			const it = (iterable as any)[Symbol.iterator]();
+			for (let val = it.next(); !val.done; val = it.next()) {
+				_map.set(val.value[0], val.value[1]);
+			}
+		}
+	}
+}
+
+func.setCallable(Map, false);

src/lib/libs/number.ts

@@ -0,0 +1,77 @@
+import { func, number, object } from "./primordials.ts";
+import { unwrapThis, valueKey } from "./utils.ts";
+
+export const Number = (() => {
+	class Number {
+		[valueKey]!: number;
+
+		public toString() {
+			return "" + unwrapThis(this, "number", Number, "Number.prototype.toString");
+		}
+		public valueOf() {
+			return unwrapThis(this, "number", Number, "Number.prototype.toString");
+		}
+
+		public constructor (value?: unknown) {
+			if (func.invokeType(arguments, this) === "call") {
+				if (arguments.length === 0) return 0 as any;
+				else return +(value as any) as any;
+			}
+			this[valueKey] = (Number as any)(value);
+		}
+
+		public static isFinite(value: number) {
+			value = unwrapThis(value, "number", Number, "Number.isFinite", "value");
+			if (value === undefined || value !== value) return false;
+			if (value === Infinity || value === -Infinity) return false;
+			return true;
+		}
+		public static isInteger(value: number) {
+			value = unwrapThis(value, "number", Number, "Number.isInteger", "value");
+			if (value === undefined) return false;
+			return number.parseInt(value) === value;
+		}
+		public static isNaN(value: number) {
+			return number.isNaN(value);
+		}
+		public static isSafeInteger(value: number) {
+			value = unwrapThis(value, "number", Number, "Number.isSafeInteger", "value");
+			if (value === undefined || number.parseInt(value) !== value) return false;
+			return value >= -9007199254740991 && value <= 9007199254740991;
+		}
+		public static parseFloat(value: unknown) {
+			if (typeof value === "number") return value;
+			else return number.parseFloat(value + "");
+		}
+		public static parseInt(value: unknown, radix = 10) {
+			radix = +radix;
+			if (number.isNaN(radix)) radix = 10;
+
+			if (typeof value === "number") return number.parseInt(value, radix);
+			else return number.parseInt(value + "", radix);
+		}
+
+		public static readonly EPSILON: number;
+		public static readonly MIN_SAFE_INTEGER: number;
+		public static readonly MAX_SAFE_INTEGER: number;
+		public static readonly POSITIVE_INFINITY: number;
+		public static readonly NEGATIVE_INFINITY: number;
+		public static readonly NaN: number;
+		public static readonly MAX_VALUE: number;
+		public static readonly MIN_VALUE: number;
+	}
+
+	object.defineField(Number, "EPSILON", false, false, false, 2.220446049250313e-16);
+	object.defineField(Number, "MIN_SAFE_INTEGER", false, false, false, -9007199254740991);
+	object.defineField(Number, "MAX_SAFE_INTEGER", false, false, false, 9007199254740991);
+	object.defineField(Number, "POSITIVE_INFINITY", false, false, false, +number.Infinity);
+	object.defineField(Number, "NEGATIVE_INFINITY", false, false, false, -number.Infinity);
+	object.defineField(Number, "NaN", false, false, false, number.NaN);
+	object.defineField(Number, "MAX_VALUE", false, false, false, 1.7976931348623157e+308);
+	object.defineField(Number, "MIN_VALUE", false, false, false, 5e-324);
+	func.setCallable(Number, true);
+	func.setConstructable(Number, true);
+
+	return Number as any as typeof Number & ((value?: unknown) => number);
+})();
+export type Number = InstanceType<typeof Number>;

src/lib/libs/object.ts

@@ -0,0 +1,90 @@
+import { Boolean } from "./boolean.ts";
+import { TypeError } from "./errors.ts";
+import { Number } from "./number.ts";
+import { func, object } from "./primordials.ts";
+import { String } from "./string.ts";
+import { Symbol } from "./symbol.ts";
+import { valueKey } from "./utils.ts";
+
+export const Object = (() => {
+	class Object {
+		public toString(this: unknown) {
+			if (this === undefined) return "[object Undefined]";
+			else if (this === null) return "[object Null]";
+			else if (typeof this === "object") {
+				if (Symbol.toStringTag in this) return "[object " + this[Symbol.toStringTag] + "]";
+				else return "[object Object]";
+			}
+			else if (typeof this === "number" || this instanceof Object) return "[object Object]";
+			else if (typeof this === "symbol" || this instanceof Symbol) return "[object Symbol]";
+			else if (typeof this === "string" || this instanceof String) return "[object String]";
+			else if (typeof this === "boolean" || this instanceof Boolean) return "[object Boolean]";
+			else if (typeof this === "function") return "[object Function]";
+		}
+		public valueOf() {
+			return this;
+		}
+
+		public constructor (value?: unknown) {
+			if (typeof value === 'object' && value !== null) return value as any;
+			if (typeof value === 'string') return new String(value) as any;
+			if (typeof value === 'number') return new Number(value) as any;
+			if (typeof value === 'boolean') return new Boolean(value) as any;
+			if (typeof value === 'symbol') {
+				var res: Symbol = {} as any;
+				object.setPrototype(res, Symbol.prototype);
+				res[valueKey] = value;
+				return res as any;
+			}
+		
+			return {} as any;
+		}
+
+		public static defineProperty(obj: object, key: string | symbol, desc: PropertyDescriptor) {
+			if (obj === null || typeof obj !== "function" && typeof obj !== "object") throw new TypeError("Object.defineProperty called on non-object");
+			if (desc === null || typeof desc !== "function" && typeof desc !== "object") throw new TypeError("Property description must be an object: " + desc);
+			if ("get" in desc || "set" in desc) {
+				var get = desc.get, set = desc.set;
+
+				if (get !== undefined && typeof get !== "function") throw new TypeError("Getter must be a function: " + get);
+				if (set !== undefined && typeof set !== "function") throw new TypeError("Setter must be a function: " + set);
+				if ("value" in desc || "writable" in desc) {
+					throw new TypeError("Invalid property descriptor. Cannot both specify accessors and a value or writable attribute");
+				}
+				if (!object.defineProperty(obj, key, !!desc.enumerable, !!desc.configurable, get, set)) {
+					throw new TypeError("Cannot redefine property: " + String(key));
+				}
+			}
+			else if (!object.defineField(obj, key, !!desc.writable, !!desc.enumerable, !!desc.configurable, desc.value)) {
+				throw new TypeError("Cannot redefine property: " + String(key));
+			}
+
+			return obj;
+		}
+		public static defineProperties(obj: object, desc: PropertyDescriptorMap) {
+			const keys = object.getOwnMembers(obj, false);
+			const symbols = object.getOwnSymbolMembers(obj, false);
+
+			for (let i = 0; i < keys.length; i++) {
+				Object.defineProperty(obj, keys[i], desc[keys[i]]);
+			}
+			for (let i = 0; i < symbols.length; i++) {
+				Object.defineProperty(obj, symbols[i], desc[symbols[i]]);
+			}
+
+			return obj;
+		}
+		public static create(proto: object, desc?: PropertyDescriptorMap) {
+			let res = object.setPrototype({}, proto);
+			if (desc != null) this.defineProperties(res, desc);
+
+			return res;
+		}
+	}
+
+	func.setCallable(Object, true);
+	func.setConstructable(Object, true);
+
+	return Object as any as typeof Object & ((value?: unknown) => object);
+})();
+export type Object = InstanceType<typeof Object>;

src/lib/libs/polyfills/callSuper.js

@@ -0,0 +1,5 @@
+import { func, object } from "../primordials.ts";
+
+export default function _callSuper(self, constr, args) {
+	return func.construct(object.getPrototype(constr), func.target(1), args || []);
+}

src/lib/libs/polyfills/classCallCheck.js

@@ -0,0 +1,5 @@
+import { func } from "../primordials.ts";
+
+export default function _classCallCheck() {
+	if (func.invokeTypeInfer() !== "new") throw new TypeError("Cannot call a class as a function");
+}

src/lib/libs/polyfills/createClass.js

@@ -0,0 +1,25 @@
+import { object } from "../primordials.ts";
+
+function _defineProperties(target, arr) {
+	if (!arr) return;
+	for (var t = 0; t < arr.length; t++) {
+		var desc = arr[t];
+
+		if ("value" in desc) {
+			object.defineField(target, desc.key, desc.writable || true, desc.enumerable || false, desc.configurable || true, desc.value);
+		}
+		else {
+			object.defineProperty(target, desc.key, desc.enumerable || false, desc.configurable || true, desc.get, desc.set);
+		}
+	}
+}
+
+/* __#PURE__ */
+export default function _createClass(clazz, instance, nonInstance) {
+	if (instance) {
+		_defineProperties(clazz.prototype, instance);
+		_defineProperties(clazz, nonInstance);
+	}
+
+	return clazz;
+}

src/lib/libs/polyfills/defineProperty.js

@@ -0,0 +1,7 @@
+import { object } from "../primordials.ts";
+
+export default function _defineProperty(obj, key, val) {
+	if (obj == null) return;
+	object.defineField(obj, key, true, true, true, val);
+	return obj;
+}

src/lib/libs/polyfills/getPrototypeOf.js

@@ -0,0 +1,5 @@
+import { object } from "../primordials.ts";
+
+export default function _getPrototypeOf(obj) {
+	return object.getPrototype(obj) || null;
+}

src/lib/libs/polyfills/inherits.js

@@ -0,0 +1,11 @@
+import { object } from "../primordials.ts";
+
+export default function _inherits(t, e) {
+	if (e == null) {
+		object.setPrototype(t.prototype, undefined);
+	}
+	else {
+		object.setPrototype(t.prototype, e.prototype);
+		object.setPrototype(t, e);
+	}
+}

src/lib/libs/polyfills/possibleConstructorReturn.js

@@ -0,0 +1,2 @@
+export default function _possibleConstructorReturn() {
+}

src/lib/libs/polyfills/setPrototypeOf.js

@@ -0,0 +1,5 @@
+import { object } from "../primordials";
+
+export default function _setPrototypeOf(obj, proto) {
+	object.setPrototype(obj, proto);
+}

src/lib/libs/polyfills/typeof.js

@@ -0,0 +1,3 @@
+export default function _typeof(val) {
+	return typeof val;
+}

src/lib/libs/primordials.ts

@@ -0,0 +1,82 @@
+export interface SymbolPrimordials {
+	makeSymbol(name: string): symbol;
+	getSymbol(name: string): symbol;
+	getSymbolKey(symbol: symbol): string | undefined;
+	getSymbolDescription(symbol: symbol): string;
+}
+export interface NumberPrimordials {
+	parseInt(raw: string | number, radix?: number): number;
+	parseFloat(raw: string | number): number;
+	isNaN(num: number): boolean;
+	NaN: number;
+	Infinity: number;
+}
+export interface StringPrimordials {
+	stringBuild(parts: string[]): string;
+	fromCharCode(char: number): string;
+	fromCodePoint(char: number): string;
+}
+export interface ObjectPrimordials {
+	defineProperty(obj: object, key: string | number | symbol, enumerable: boolean, configurable: boolean, get?: Function, set?: Function): boolean;
+	defineField(obj: object, key: string | number | symbol, writable: boolean, enumerable: boolean, configurable: boolean, value: any): boolean;
+	getOwnMember(): any;
+	getOwnSymbolMember(): any;
+	getOwnMembers(obj: object, onlyEnumerable: boolean): string[];
+	getOwnSymbolMembers(obj: object, onlyEnumerable: boolean): symbol[];
+	getPrototype(obj: object): object | undefined;
+	setPrototype(obj: object, proto?: object): object;
+	isArray(obj: any[]): boolean;
+}
+export interface FunctionPrimordials {
+	invokeType(args: IArguments, self: any): "new" | "call";
+	invokeTypeInfer(): "new" | "call";
+	target(): Function | null | undefined;
+	setConstructable(func: Function, flag: boolean): void;
+	setCallable(func: Function, flag: boolean): void;
+	invoke(func: Function, self: any, args: any[]): void;
+	construct(func: Function, self: any, args: any[]): void;
+}
+export interface JSONPrimordials {
+	parse(data: string): any;
+	stringify(data: any): string;
+}
+
+export interface Primordials {
+	symbol: SymbolPrimordials;
+	number: NumberPrimordials;
+	string: StringPrimordials;
+	object: ObjectPrimordials;
+	function: FunctionPrimordials;
+	json: JSONPrimordials;
+	map: new () => {
+		get(key: any): any;
+		has(key: any): boolean;
+		set(key: any, val: any): void;
+		delete(key: any): void;
+		keys(): any[];
+	};
+	regex: new (source: string) => {
+		exec(target: string, offset: number, indices: false): {
+			
+		};
+	};
+	compile(src: string): Function;
+	setGlobalPrototypes(prototype: Record<string, any>): void;
+}
+
+globalThis.undefined = void 0;
+export const target = (globalThis as any).target;
+export const primordials: Primordials = (globalThis as any).primordials;
+
+export const {
+	symbol,
+	number,
+	string,
+	object,
+	function: func,
+	json,
+	map,
+	regex,
+	setGlobalPrototypes,
+	compile,
+} = primordials;

src/lib/libs/regex.ts

@@ -0,0 +1,54 @@
+import { func, regex } from "./primordials.ts";
+import { String } from "./string.ts";
+import { Symbol } from "./symbol.ts";
+
+const regexKey: unique symbol = Symbol("RegExp.impl") as any;
+
+export class RegExp {
+	private [regexKey]: InstanceType<typeof regex>;
+
+	public readonly source: string;
+	public readonly flags: string;
+	public lastIndex = 0;
+
+	public constructor(source: any, flags: string) {
+		source = this.source = String(typeof source === "object" && "source" in source ? source.source : source);
+		flags = String(flags);
+
+		const _regex = this[regexKey] = new regex(source);
+	
+		let indices = false;
+		let global = false;
+		let ignoreCase = false;
+		let multiline = false;
+		let dotall = false;
+		let unicode = false;
+		let unicodeSets = false;
+		let sticky = false;
+	
+		for (let i = 0; i < flags.length; i++) {
+			switch (flags[i]) {
+				case "d": indices = true; break;
+				case "g": global = true; break;
+				case "i": ignoreCase = true; break;
+				case "m": multiline = true; break;
+				case "s": dotall = true; break;
+				case "u": unicode = true; break;
+				case "v": unicodeSets = true; break;
+				case "y": sticky = true; break;
+			}
+		}
+	
+		flags = "";
+		if (indices) flags += "d";
+		if (global) flags += "g";
+		if (ignoreCase) flags += "i";
+		if (multiline) flags += "m";
+		if (dotall) flags += "s";
+		if (unicode) flags += "u";
+		if (unicodeSets) flags += "v";
+		if (sticky) flags += "y";
+		this.flags = flags;
+	}
+}
+func.setCallable(RegExp, false);

src/lib/libs/string.ts

@@ -0,0 +1,84 @@
+import { func, string } from "./primordials.ts";
+import { Symbol } from "./symbol.ts";
+import { unwrapThis, valueKey } from "./utils.ts";
+
+export const String = (() => {
+	class String {
+		[valueKey]!: string;
+
+		public at(index: number) {
+			throw "Not implemented :/";
+			return unwrapThis(this, "string", String, "String.prototype.at")[index];
+		};
+		public toString() {
+			return unwrapThis(this, "string", String, "String.prototype.toString");
+		}
+		public valueOf() {
+			return unwrapThis(this, "string", String, "String.prototype.valueOf");
+		}
+
+		// public split(val: string) {
+		// 	const res: string[] = [];
+
+		// 	while (true) {
+		// 		val.indexOf();
+		// 	}
+		// }
+
+		public [Symbol.iterator]() {
+			var i = 0;
+			var arr: string | undefined = unwrapThis(this, "string", String, "String.prototype[Symbol.iterator]");
+
+			return {
+				next () {
+					if (arr == null) return { done: true, value: undefined };
+					if (i > arr.length) {
+						arr = undefined;
+						return { done: true, value: undefined };
+					}
+					else {
+						var val = arr[i++];
+						if (i >= arr.length) arr = undefined;
+						return { done: false, value: val };
+					}
+				},
+				[Symbol.iterator]() { return this; }
+			};
+		}
+
+		public constructor (value?: unknown) {
+			if (func.invokeType(arguments, this) === "call") {
+				if (arguments.length === 0) return "" as any;
+				else if (typeof value === "symbol") return value.toString() as any;
+				else return (value as any) + "" as any;
+			}
+			this[valueKey] = (String as any)(value);
+		}
+
+		public static fromCharCode(...args: number[]) {
+			const res: string[] = [];
+			res[arguments.length] = "";
+
+			for (let i = 0; i < arguments.length; i++) {
+				res[i] = string.fromCharCode(+arguments[i]);
+			}
+
+			return string.stringBuild(res);
+		}
+		public static fromCodePoint(...args: number[]) {
+			const res: string[] = [];
+			res[arguments.length] = "";
+
+			for (var i = 0; i < arguments.length; i++) {
+				res[i] = string.fromCodePoint(+arguments[i]);
+			}
+			return string.stringBuild(res);
+		}
+	}
+
+	func.setCallable(String, true);
+	func.setConstructable(String, true);
+
+	return String as any as typeof String & ((value?: unknown) => string);
+})();
+export type String = InstanceType<typeof String>;

src/lib/libs/symbol.ts

@@ -0,0 +1,52 @@
+import { func, object, symbol } from "./primordials.ts";
+import { unwrapThis, valueKey } from "./utils.ts";
+
+export const Symbol = (() => {
+	class Symbol {
+		[valueKey]!: symbol;
+
+		get description() {
+			return symbol.getSymbolDescription(unwrapThis(this, "symbol", Symbol, "Symbol.prototype.description"));
+		}
+	
+		public toString() {
+			return "Symbol(" + unwrapThis(this, "symbol", Symbol, "Symbol.prototype.toString").description + ")";
+		}
+		public valueOf() {
+			return unwrapThis(this, "symbol", Symbol, "Symbol.prototype.valueOf");
+		}
+	
+		public constructor(name = "") {
+			return symbol.makeSymbol(name + "") as any;
+		}
+	
+		public static for(name: string) {
+			return symbol.getSymbol(name + "");
+		}
+
+		public static readonly asyncIterator: unique symbol;
+		public static readonly iterator: unique symbol;
+		public static readonly match: unique symbol;
+		public static readonly matchAll: unique symbol;
+		public static readonly replace: unique symbol;
+		public static readonly search: unique symbol;
+		public static readonly split: unique symbol;
+		public static readonly toStringTag: unique symbol;
+	};
+
+	func.setCallable(Symbol, true);
+	func.setConstructable(Symbol, false);
+
+	object.defineField(Symbol, "asyncIterator", false, false, false, symbol.getSymbol("Symbol.asyncIterator"));
+	object.defineField(Symbol, "iterator", false, false, false, symbol.getSymbol("Symbol.iterator"));
+	object.defineField(Symbol, "match", false, false, false, symbol.getSymbol("Symbol.match"));
+	object.defineField(Symbol, "matchAll", false, false, false, symbol.getSymbol("Symbol.matchAll"));
+	object.defineField(Symbol, "replace", false, false, false, symbol.getSymbol("Symbol.replace"));
+	object.defineField(Symbol, "search", false, false, false, symbol.getSymbol("Symbol.search"));
+	object.defineField(Symbol, "split", false, false, false, symbol.getSymbol("Symbol.split"));
+	object.defineField(Symbol, "toStringTag", false, false, false, symbol.getSymbol("Symbol.toStringTag"));
+	
+	return Symbol as any as typeof Symbol & ((name?: string) => symbol);
+})();
+export type Symbol = InstanceType<typeof Symbol>;
+

src/lib/libs/utils.ts

@@ -0,0 +1,21 @@
+import { symbol } from "./primordials.ts";
+
+export const valueKey: unique symbol = symbol.makeSymbol("Primitive.value") as any;
+
+export interface TypeMap {
+	undefined: undefined;
+	boolean: boolean;
+	string: string;
+	number: number;
+	symbol: symbol;
+	object: null | object;
+	function: Function;
+}
+
+export function unwrapThis<T extends keyof TypeMap>(self: any, type: T, constr: Function, name: string, arg = "this", defaultVal?: TypeMap[T]): TypeMap[T] {
+	if (typeof self === type) return self;
+	if (self instanceof constr && valueKey in self) self = (self as any)[valueKey];
+	if (typeof self === type) return self;
+	if (defaultVal !== undefined) return defaultVal;
+	throw new TypeError(name + " requires that '" + arg + "' be a " + constr.name);
+}

src/lib/ts/_entry.ts

@@ -0,0 +1,106 @@
+import { createDocumentRegistry, createLanguageService, ModuleKind, ScriptSnapshot, ScriptTarget, type Diagnostic, type CompilerOptions, type IScriptSnapshot, flattenDiagnosticMessageText, CompilerHost } from "typescript";
+
+declare function getResource(name: string): string;
+declare function print(...args: any[]): void;
+declare function register(factory: CompilerFactory): void;
+
+type CompilerFactory = (next: Compiler) => Compiler;
+type Compiler = (filename: string, src: string, maps: any[]) => Function;
+
+const resources: Record<string, string | undefined> = {};
+
+function resource(name: string) {
+	if (name in resources) return resources[name];
+	else return resources[name] = getResource(name);
+}
+
+register(next => {
+	const files: Record<string, IScriptSnapshot> = {};
+	const versions: Record<string, number> = {};
+	let declI = 0;
+
+	const settings: CompilerOptions = {
+		target: ScriptTarget.ESNext,
+		module: ModuleKind.Preserve,
+	
+		allowImportingTsExtensions: true,
+		verbatimModuleSyntax: true,
+		
+		strict: false,
+		skipLibCheck: true,
+		forceConsistentCasingInFileNames: true,
+		declaration: true,
+	};
+
+	const service = createLanguageService({
+		getCurrentDirectory: () => "/",
+		getDefaultLibFileName: () => "/lib.d.ts",
+		getScriptFileNames: () => {
+			const res = ["/src.ts", "/lib.d.ts"];
+			for (let i = 0; i < declI; i++) res.push("/src." + i + ".d.ts");
+			return res;
+		},
+		getCompilationSettings: () => settings,
+		log: print,
+		fileExists: filename => filename in files || resource(filename) != null,
+	
+		getScriptSnapshot: (filename) => {
+			if (filename in files) return files[filename];
+			else {
+				const src = resource(filename);
+				if (src == null) return undefined;
+				return files[filename] = ScriptSnapshot.fromString(src);
+			}
+		},
+		getScriptVersion: (filename) => String(versions[filename] || 0),
+	
+		readFile: () => { throw "no"; },
+		writeFile: () => { throw "no"; },
+	}, createDocumentRegistry());
+	
+	service.getEmitOutput("/lib.d.ts");
+	print("Loaded typescript...");
+	
+	return (code, filename, mapChain) => {
+		files["/src.ts"] = ScriptSnapshot.fromString(code);
+		versions["/src.ts"] ??= 0;
+		versions["/src.ts"]++;
+
+		const emit = service.getEmitOutput("/src.ts");
+
+		const diagnostics = new Array<Diagnostic>()
+			.concat(service.getCompilerOptionsDiagnostics())
+			.concat(service.getSyntacticDiagnostics("/src.ts"))
+			.concat(service.getSemanticDiagnostics("/src.ts"))
+			.map(function (diagnostic) {
+				const message = flattenDiagnosticMessageText(diagnostic.messageText, "\n");
+
+				if (diagnostic.file != null) {
+					let file = diagnostic.file.fileName.substring(1);
+					if (file === "src.ts") file = filename;
+
+					if (diagnostic.start == null) return file;
+
+					const pos = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
+					return file + ":" + (pos.line + 1) + ":" + (pos.character + 1) + ": " + message;
+				}
+				else return message;
+			});
+
+		if (diagnostics.length > 0) {
+			throw new SyntaxError(diagnostics.join("\n"));
+		}
+
+		var map = JSON.parse(emit.outputFiles[0].text);
+		var result = emit.outputFiles[1].text;
+		var declaration = emit.outputFiles[2].text;
+
+		var compiled = next(result, filename, mapChain.concat(map));
+
+		return function (this: any) {
+			const res = compiled.apply(this, arguments);
+			if (declaration !== '') files["/src." + declI++ + ".d.ts"] = ScriptSnapshot.fromString(declaration);
+			return res;
+		};
+	};
+});

src/main/java/me/topchetoeu/jscript/runtime/SimpleRepl.java

@@ -16,7 +16,6 @@ import me.topchetoeu.jscript.common.environment.Environment;
 import me.topchetoeu.jscript.common.environment.Key;
 import me.topchetoeu.jscript.common.json.JSON;
 import me.topchetoeu.jscript.common.parsing.Filename;
-import me.topchetoeu.jscript.compilation.CompileResult;
 import me.topchetoeu.jscript.runtime.debug.DebugContext;
 import me.topchetoeu.jscript.runtime.exceptions.EngineException;
 import me.topchetoeu.jscript.runtime.values.Member.FieldMember;
@@ -298,6 +297,9 @@ public class SimpleRepl {
 		res.defineOwnMember(env, "getOwnSymbolMembers", new NativeFunction(args -> {
 			return ArrayValue.of(args.get(0).getOwnSymbolMembers(env, args.get(1).toBoolean()));
 		}));
+		res.defineOwnMember(env, "isArray", new NativeFunction(args -> {
+			return BoolValue.of(args.get(0) instanceof ArrayValue);
+		}));
 
 		return res;
 	}
@@ -320,6 +322,16 @@ public class SimpleRepl {
 			if (((ArgumentsValue)args.get(0)).frame.isNew) return StringValue.of("new");
 			else return StringValue.of("call");
 		}));
+		res.defineOwnMember(env, "invokeTypeInfer", new NativeFunction(args -> {
+			var frame = Frame.get(args.env, args.get(0).toNumber(args.env).getInt());
+			if (frame.isNew) return StringValue.of("new");
+			else return StringValue.of("call");
+		}));
+		res.defineOwnMember(env, "target", new NativeFunction(args -> {
+			var frame = Frame.get(args.env, args.get(0).toNumber(args.env).getInt());
+			if (frame.target == null) return Value.UNDEFINED;
+			else return frame.target;
+		}));
 
 		res.defineOwnMember(env, "invoke", new NativeFunction(args -> {
 			var func = (FunctionValue)args.get(0);
@@ -330,9 +342,11 @@ public class SimpleRepl {
 		}));
 		res.defineOwnMember(env, "construct", new NativeFunction(args -> {
 			var func = (FunctionValue)args.get(0);
-			var funcArgs = (ArrayValue)args.get(1);
+			var target = args.get(1);
+			var funcArgs = (ArrayValue)args.get(2);
 
-			return func.constructNoSelf(env, funcArgs.toArray());
+			if (target == Value.UNDEFINED) return func.constructNoSelf(env, funcArgs.toArray());
+			else return func.construct(env, target, funcArgs.toArray());
 		}));
 
 		return res;
@@ -388,9 +402,9 @@ public class SimpleRepl {
 			setProto(args.env, env, Value.SYNTAX_ERR_PROTO, obj, "syntax");
 			setProto(args.env, env, Value.TYPE_ERR_PROTO, obj, "type");
 			setProto(args.env, env, Value.RANGE_ERR_PROTO, obj, "range");
-			var val = obj.getMember(env, "regex");
+			var val = obj.getMember(args.env, "regex");
 			if (val instanceof FunctionValue func) {
-				args.env.add(Value.REGEX_CONSTR, func);
+				env.add(Value.REGEX_CONSTR, func);
 			}
 			return Value.UNDEFINED;
 		}));
@@ -409,13 +423,29 @@ public class SimpleRepl {
 		return res;
 	}
 
-	private static void initEnv() {
-		environment.add(EventLoop.KEY, engine);
-		environment.add(DebugContext.KEY, new DebugContext());
-		environment.add(Compiler.KEY, Compiler.DEFAULT);
+	private static Environment createESEnv() throws InterruptedException, ExecutionException {
+		var env = initEnv();
+		var stubEnv = initEnv();
+		Value.global(stubEnv).defineOwnMember(stubEnv, "target", Value.global(env));
+		Value.global(stubEnv).defineOwnMember(stubEnv, "primordials", primordials(env));
+
+		EventLoop.get(stubEnv).pushMsg(
+			false, stubEnv,
+			Filename.parse("jscript://init.js"), Reading.resourceToString("lib/index.js"),
+			Value.UNDEFINED
+		).get();
+
+		return env;
+	}
+
+	private static Environment initEnv() {
+		var env = new Environment();
+		env.add(EventLoop.KEY, engine);
+		env.add(DebugContext.KEY, new DebugContext());
+		env.add(Compiler.KEY, Compiler.DEFAULT);
 		// environment.add(CompileResult.DEBUG_LOG);
 
-		var glob = Value.global(environment);
+		var glob = Value.global(env);
 
 		glob.defineOwnMember(null, "exit", new NativeFunction("exit", args -> {
 			Thread.currentThread().interrupt();
@@ -439,20 +469,26 @@ public class SimpleRepl {
 
 			return Value.UNDEFINED;
 		}));
+
+		return env;
 	}
 	private static void initEngine() {
 		engineTask = engine.start();
 	}
 	private static void initGlobals() throws InterruptedException, ExecutionException {
-		EventLoop.get(environment).pushMsg(
-			false, environment,
-			Filename.parse("jscript://init.js"), Reading.resourceToString("lib/index.js"),
-			Value.UNDEFINED, Value.global(environment), primordials(environment)
-		).get();
-		EventLoop.get(environment).pushMsg(
-			false, environment,
-			Filename.parse("jscript://ts.js"), Reading.resourceToString("lib/ts.js"),
-			Value.UNDEFINED
+		environment = createESEnv();
+		var tsEnv = createESEnv();
+		var res = new FunctionValue[1];
+		var setter = new NativeFunction(args -> {
+			res[0] = (FunctionValue)args.get(0);
+			return Value.UNDEFINED;
+		});
+
+		var ts = Reading.resourceToString("lib/ts.js");
+		if (ts != null) EventLoop.get(tsEnv).pushMsg(
+			false, tsEnv,
+			Filename.parse("jscript://ts.js"), ts,
+			Value.UNDEFINED, setter
 		).get();
 	}
 
@@ -460,7 +496,7 @@ public class SimpleRepl {
 		SimpleRepl.args = args;
 		var reader = new Thread(SimpleRepl::reader);
 
-		initEnv();
+		environment = initEnv();
 		initEngine();
 
 		reader.setDaemon(true);