build: specify java toolchain

Major codebase cleanup

.github/workflows/tagged-release.yml

@@ -16,15 +16,17 @@ jobs:
         with:
           distribution: 'adopt'
           java-version: '11'
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
       - name: Clone repository
         uses: GuillaumeFalourd/clone-github-repo-action@main
         with:
-          branch: 'master' # fuck this political bullshitshit, took me an hour to fix this
+          branch: 'master'
           owner: 'TopchetoEU'
           repository: 'java-jscript'
-      - name: "Build"
+      - name: Build
         run: |
-          cd java-jscript; node ./build.js release ${{ github.ref }}
+          cd java-jscript; gradle build
 
       - uses: "marvinpinto/action-automatic-releases@latest"
         with:
@@ -32,4 +34,4 @@ jobs:
           prerelease: false
           files: |
             java-jscript/LICENSE
-            java-jscript/dst/*.jar
+            java-jscript/build/libs/*.jar

.gitignore

@@ -3,7 +3,8 @@
 !/src
 !/src/**/*
 
-/src/assets/js/ts.js
+!/doc
+!/doc/**/*
 
 !/tests
 !/tests/**/*
@@ -16,3 +17,9 @@
 !/build.js
 !/LICENSE
 !/README.md
+!/settings.gradle
+!/build.gradle
+!/gradle.properties
+!/gradle
+!/gradle/wrapper
+!/gradle/wrapper/gradle-wrapper.properties

README.md

@@ -11,7 +11,7 @@ JScript is an engine, capable of running EcmaScript 5, written entirely in Java.
 The following is going to execute a simple javascript statement:
 
 ```java
-var engine = new Engine(false);
+var engine = new Engine();
 // Initialize a standard environment, with implementations of most basic standard libraries (Object, Array, Symbol, etc.)
 var env = Internals.apply(new Environment());
 
@@ -26,4 +26,4 @@ System.out.println(awaitable.await());
 
 ## NOTE:
 
-To setup the typescript bundle in your sources, run `node build.js init-ts`. This will download the latest version of typescript, minify it, and add it to your src/assets folder. If you are going to work with the `node build.js debug|release` command, this is not a necessary step.
+To setup the typescript bundle in your sources, run `node build.js init-ts`. This will download the latest version of typescript, minify it, and add it to your src folder. If you are going to work with the `node build.js debug|release` command, this is not a necessary step.

build.gradle

@@ -0,0 +1,39 @@
+plugins {
+    id 'application'
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+
+    toolchain.languageVersion = JavaLanguageVersion.of(11)
+}
+
+jar {
+    manifest {
+        attributes (
+            'Main-Class': project.main_class
+        )
+    }
+}
+
+sourceSets {
+    main.java.srcDirs = [ 'src/java' ]
+    main.resources.srcDirs = [ 'src/assets' ]
+}
+
+processResources {
+    filesMatching('metadata.json') {
+        expand (
+            'version': project.project_version,
+            'name': project.project_name
+        )
+    }
+}
+
+application {
+    mainClass = project.main_class
+}
+
+archivesBaseName = project.project_name
+version = project.project_version

build.js

@@ -1,172 +0,0 @@
-const { spawn } = require('child_process');
-const fs = require('fs/promises');
-const pt = require('path');
-const { argv, exit } = require('process');
-const { Readable } = require('stream');
-
-
-async function* find(src, dst, wildcard) {
-    const stat = await fs.stat(src);
-
-    if (stat.isDirectory()) {
-        for (const el of await fs.readdir(src)) {
-            for await (const res of find(pt.join(src, el), dst ? pt.join(dst, el) : undefined, wildcard)) yield res;
-        }
-    }
-    else if (stat.isFile() && wildcard(src)) yield dst ? { src, dst } : src;
-}
-async function copy(src, dst, wildcard) {
-    const promises = [];
-
-    for await (const el of find(src, dst, wildcard)) {
-        promises.push((async () => {
-            await fs.mkdir(pt.dirname(el.dst), { recursive: true });
-            await fs.copyFile(el.src, el.dst);
-        })());
-    }
-
-    await Promise.all(promises);
-}
-
-function run(suppressOutput, cmd, ...args) {
-    return new Promise((res, rej) => {
-        const proc = spawn(cmd, args, { stdio: suppressOutput ? 'ignore' : 'inherit' });
-        proc.once('exit', code => {
-            if (code === 0) res(code);
-            else rej(new Error(`Process ${cmd} exited with code ${code}.`));
-        });
-    })
-}
-
-async function downloadTypescript(outFile) {
-    try {
-        // Import the required libraries, without the need of a package.json
-        console.log('Importing modules...');
-        await run(true, 'npm', 'i', 'tar', 'zlib', 'uglify-js');
-        await fs.mkdir(pt.dirname(outFile), { recursive: true });
-        await fs.mkdir('tmp', { recursive: true });
-
-        const tar = require('tar');
-        const zlib = require('zlib');
-        const { minify } = await import('uglify-js');
-
-        // Download the package.json file of typescript
-        const packageDesc = await (await fetch('https://registry.npmjs.org/typescript/latest')).json();
-        const url = packageDesc.dist.tarball;
-
-        console.log('Extracting typescript...');
-        await new Promise(async (res, rej) => Readable.fromWeb((await fetch(url)).body)
-            .pipe(zlib.createGunzip())
-            .pipe(tar.x({ cwd: 'tmp', filter: v => v === 'package/lib/typescript.js' }))
-            .on('end', res)
-            .on('error', rej)
-        );
-
-        console.log('Compiling typescript to ES5...');
-
-        const ts = require('./tmp/package/lib/typescript');
-        const program = ts.createProgram([ 'tmp/package/lib/typescript.js' ], {
-            outFile: "tmp/typescript-es5.js",
-            target: ts.ScriptTarget.ES5,
-            module: ts.ModuleKind.None,
-            downlevelIteration: true,
-            allowJs: true,
-        });
-        program.emit();
-
-        console.log('Minifying typescript...');
-
-        const minified = minify((await fs.readFile('tmp/typescript-es5.js')).toString());
-        if (minified.error) throw minified.error;
-
-        // Patch unsupported regex syntax
-        minified.code = minified.code.replaceAll('[-/\\\\^$*+?.()|[\\]{}]', '[-/\\\\^$*+?.()|\\[\\]{}]');
-
-        const stream = await fs.open(outFile, 'w');
-
-        // Write typescript's license
-        await stream.write(new TextEncoder().encode(`
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved.
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0
-
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
-MERCHANTABLITY OR NON-INFRINGEMENT.
-
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-
-The following is a minified version of the unmodified Typescript 5.2
-***************************************************************************** */
-`));
-
-        await stream.write(minified.code);
-        console.log('Typescript bundling done!');
-    }
-    finally {
-        // Clean up all stuff left from typescript bundling
-        await fs.rm('tmp', { recursive: true, force: true });
-        await fs.rm('package.json');
-        await fs.rm('package-lock.json');
-        await fs.rm('node_modules', { recursive: true });
-    }
-}
-async function compileJava(conf) {
-    try {
-        await fs.writeFile('Metadata.java', (await fs.readFile('src/me/topchetoeu/jscript/Metadata.java')).toString()
-            .replace('${VERSION}', conf.version)
-            .replace('${NAME}', conf.name)
-            .replace('${AUTHOR}', conf.author)
-        );
-        const args = ['--release', '11', ];
-        if (argv[2] === 'debug') args.push('-g');
-        args.push('-d', 'dst/classes', 'Metadata.java');
-    
-        console.log('Compiling java project...');
-        for await (const path of find('src', undefined, v => v.endsWith('.java') && !v.endsWith('Metadata.java'))) args.push(path);
-        await run(false, conf.javahome + 'javac', ...args);
-        console.log('Compiled java project!');
-    }
-    finally {
-        await fs.rm('Metadata.java');
-    }
-}
-
-(async () => {
-    try {
-        if (argv[2] === 'init-ts') {
-            await downloadTypescript('src/assets/js/ts.js');
-        }
-        else {
-            const conf = {
-                name: "java-jscript",
-                author: "TopchetoEU",
-                javahome: "",
-                version: argv[3]
-            };
-
-            if (conf.version.startsWith('refs/tags/')) conf.version = conf.version.substring(10);
-            if (conf.version.startsWith('v')) conf.version = conf.version.substring(1);
-
-            try { await fs.rm('dst', { recursive: true }); } catch {}
-
-            await Promise.all([
-                downloadTypescript('dst/classes/assets/js/ts.js'),
-                copy('src', 'dst/classes', v => !v.endsWith('.java')),
-                compileJava(conf),
-            ]);
-
-            await run(true, 'jar', '-c', '-f', 'dst/jscript.jar', '-e', 'me.topchetoeu.jscript.Main', '-C', 'dst/classes', '.');
-            console.log('Done!');
-        }
-    }
-    catch (e) {
-        if (argv[2] === 'debug') throw e;
-        console.log(e.toString());
-        exit(-1);
-    }
-})();

gradle.properties

@@ -0,0 +1,3 @@
+project_name = jscript
+project_version = 0.8.4-beta
+main_class = me.topchetoeu.jscript.utils.JScriptRepl

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

settings.gradle

@@ -0,0 +1,3 @@
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.7.0'
+}

src/assets/js/bootstrap.js

@@ -1,113 +0,0 @@
-(function (ts, env, libs) {
-    var src = '', version = 0;
-    var lib = libs.concat([
-        'declare function exit(): never;',
-        'declare function go(): any;',
-        'declare function getTsDeclarations(): string[];'
-    ]).join('');
-    var libSnapshot = ts.ScriptSnapshot.fromString(lib);
-    var environments = {};
-    var declSnapshots = [];
-
-    var settings = {
-        outDir: "/out",
-        declarationDir: "/out",
-        target: ts.ScriptTarget.ES5,
-        lib: [ ],
-        module: ts.ModuleKind.None,
-        declaration: true,
-        stripInternal: true,
-        downlevelIteration: true,
-        forceConsistentCasingInFileNames: true,
-        experimentalDecorators: true,
-        strict: true,
-        sourceMap: true,
-    };
-
-    var reg = ts.createDocumentRegistry();
-    var service = ts.createLanguageService({
-        getCurrentDirectory: function() { return "/"; },
-        getDefaultLibFileName: function() { return "/lib.d.ts"; },
-        getScriptFileNames: function() {
-            var res = [ "/src.ts", "/lib.d.ts" ];
-            for (var i = 0; i < declSnapshots.length; i++) res.push("/glob." + (i + 1) + ".d.ts");
-            return res;
-        },
-        getCompilationSettings: function () { return settings; },
-        fileExists: function(filename) { return filename === "/lib.d.ts" || filename === "/src.ts" || filename === "/glob.d.ts"; },
-
-        getScriptSnapshot: function(filename) {
-            if (filename === "/lib.d.ts") return libSnapshot;
-            if (filename === "/src.ts") return ts.ScriptSnapshot.fromString(src);
-
-            var index = /\/glob\.(\d+)\.d\.ts/g.exec(filename);
-            if (index && index[1] && (index = Number(index[1])) && index > 0 && index <= declSnapshots.length) {
-                return declSnapshots[index - 1];
-            }
-
-            throw new Error("File '" + filename + "' doesn't exist.");
-        },
-        getScriptVersion: function (filename) {
-            if (filename === "/lib.d.ts" || filename.startsWith("/glob.")) return 0;
-            else return version;
-        },
-    }, reg);
-
-    service.getEmitOutput("/lib.d.ts");
-    log("Loaded libraries!");
-
-    var oldCompile = env.compile;
-
-    function compile(code, filename, env) {
-        src = code;
-        version++;
-
-        if (!environments[env.id]) environments[env.id] = []
-        var decls = declSnapshots = environments[env.id];
-        var emit = service.getEmitOutput("/src.ts");
-
-        var diagnostics = []
-            .concat(service.getCompilerOptionsDiagnostics())
-            .concat(service.getSyntacticDiagnostics("/src.ts"))
-            .concat(service.getSemanticDiagnostics("/src.ts"))
-            .map(function (diagnostic) {
-                var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
-                if (diagnostic.file) {
-                    var pos = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
-                    var file = diagnostic.file.fileName.substring(1);
-                    if (file === "src.ts") file = filename;
-                    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 = oldCompile(result, filename, env);
-
-        return {
-            function: function () {
-                var val = compiled.function.apply(this, arguments);
-                if (declaration !== '') decls.push(ts.ScriptSnapshot.fromString(declaration));
-                return val;
-            },
-            breakpoints: compiled.breakpoints,
-            mapChain: compiled.mapChain.concat(map.mappings),
-        };
-    }
-
-    function apply(env) {
-        env.compile = compile;
-        env.global.getTsDeclarations = function() {
-            return environments[env.id];
-        }
-    }
-
-    apply(env);
-})(arguments[0], arguments[1], arguments[2]);

src/assets/js/lib.d.ts

@@ -1,623 +0,0 @@
-type PropertyDescriptor<T, ThisT> = {
-    value: any;
-    writable?: boolean;
-    enumerable?: boolean;
-    configurable?: boolean;
-} | {
-    get?(this: ThisT): T;
-    set(this: ThisT, val: T): void;
-    enumerable?: boolean;
-    configurable?: boolean;
-} | {
-    get(this: ThisT): T;
-    set?(this: ThisT, val: T): void;
-    enumerable?: boolean;
-    configurable?: boolean;
-};
-type Exclude<T, U> = T extends U ? never : T;
-type Extract<T, U> = T extends U ? T : never;
-type Record<KeyT extends string | number | symbol, ValT> = { [x in KeyT]: ValT }
-type ReplaceFunc = (match: string, ...args: any[]) => string;
-
-type PromiseResult<T> = { type: 'fulfilled'; value: T; } | { type: 'rejected'; reason: any; }
-
-// wippidy-wine, this code is now mine :D
-type Awaited<T> =
-    T extends null | undefined ? T : // special case for `null | undefined` when not in `--strictNullChecks` mode
-        T extends object & { then(onfulfilled: infer F, ...args: infer _): any } ? // `await` only unwraps object types with a callable `then`. Non-object types are not unwrapped
-            F extends ((value: infer V, ...args: infer _) => any) ? // if the argument to `then` is callable, extracts the first argument
-                Awaited<V> : // recursively unwrap the value
-                never : // the argument to `then` was not callable
-        T;
-
-type IteratorYieldResult<TReturn> =
-    { done?: false; } &
-    (TReturn extends undefined ? { value?: undefined; } : { value: TReturn; });
-
-type IteratorReturnResult<TReturn> =
-    { done: true } &
-    (TReturn extends undefined ? { value?: undefined; } : { value: TReturn; });
-
-type IteratorResult<T, TReturn = any> = IteratorYieldResult<T> | IteratorReturnResult<TReturn>;
-
-interface Thenable<T> {
-    then<NextT = void>(onFulfilled?: (val: T) => NextT, onRejected?: (err: any) => NextT): Promise<Awaited<NextT>>;
-}
-
-interface RegExpResultIndices extends Array<[number, number]> {
-    groups?: { [name: string]: [number, number]; };
-}
-interface RegExpResult extends Array<string> {
-    groups?: { [name: string]: string; };
-    index: number;
-    input: string;
-    indices?: RegExpResultIndices;
-    escape(raw: string, flags: string): RegExp;
-}
-
-interface Matcher {
-    [Symbol.match](target: string): RegExpResult | string[] | null;
-    [Symbol.matchAll](target: string): IterableIterator<RegExpResult>;
-}
-interface Splitter {
-    [Symbol.split](target: string, limit?: number, sensible?: boolean): string[];
-}
-interface Replacer {
-    [Symbol.replace](target: string, replacement: string | ReplaceFunc): string;
-}
-interface Searcher {
-    [Symbol.search](target: string, reverse?: boolean, start?: number): number;
-}
-
-type FlatArray<Arr, Depth extends number> = {
-    "done": Arr,
-    "recur": Arr extends Array<infer InnerArr>
-        ? FlatArray<InnerArr, [-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20][Depth]>
-        : Arr
-}[Depth extends -1 ? "done" : "recur"];
-
-interface IArguments {
-    [i: number]: any;
-    length: number;
-}
-
-interface Iterator<T, TReturn = any, TNext = undefined> {
-    next(...args: [] | [TNext]): IteratorResult<T, TReturn>;
-    return?(value?: TReturn): IteratorResult<T, TReturn>;
-    throw?(e?: any): IteratorResult<T, TReturn>;
-}
-interface Iterable<T> {
-    [Symbol.iterator](): Iterator<T>;
-}
-interface IterableIterator<T> extends Iterator<T> {
-    [Symbol.iterator](): IterableIterator<T>;
-}
-
-interface AsyncIterator<T, TReturn = any, TNext = undefined> {
-    next(...args: [] | [TNext]): Promise<IteratorResult<T, TReturn>>;
-    return?(value?: TReturn | Thenable<TReturn>): Promise<IteratorResult<T, TReturn>>;
-    throw?(e?: any): Promise<IteratorResult<T, TReturn>>;
-}
-interface AsyncIterable<T> {
-    [Symbol.asyncIterator](): AsyncIterator<T>;
-}
-interface AsyncIterableIterator<T> extends AsyncIterator<T> {
-    [Symbol.asyncIterator](): AsyncIterableIterator<T>;
-}
-
-interface Generator<T = unknown, TReturn = void, TNext = unknown> extends Iterator<T, TReturn, TNext> {
-    [Symbol.iterator](): Generator<T, TReturn, TNext>;
-    return(value: TReturn): IteratorResult<T, TReturn>;
-    throw(e: any): IteratorResult<T, TReturn>;
-}
-interface GeneratorFunction {
-    new (...args: any[]): Generator;
-    (...args: any[]): Generator;
-    readonly length: number;
-    readonly name: string;
-    readonly prototype: Generator;
-}
-
-interface AsyncGenerator<T = unknown, TReturn = void, TNext = unknown> extends AsyncIterator<T, TReturn, TNext> {
-    return(value: TReturn | Thenable<TReturn>): Promise<IteratorResult<T, TReturn>>;
-    throw(e: any): Promise<IteratorResult<T, TReturn>>;
-    [Symbol.asyncIterator](): AsyncGenerator<T, TReturn, TNext>;
-}
-interface AsyncGeneratorFunction {
-    new (...args: any[]): AsyncGenerator;
-    (...args: any[]): AsyncGenerator;
-    readonly length: number;
-    readonly name: string;
-    readonly prototype: AsyncGenerator;
-}
-
-
-interface MathObject {
-    readonly E: number;
-    readonly PI: number;
-    readonly SQRT2: number;
-    readonly SQRT1_2: number;
-    readonly LN2: number;
-    readonly LN10: number;
-    readonly LOG2E: number;
-    readonly LOG10E: number;
-
-    asin(x: number): number;
-    acos(x: number): number;
-    atan(x: number): number;
-    atan2(y: number, x: number): number;
-    asinh(x: number): number;
-    acosh(x: number): number;
-    atanh(x: number): number;
-    sin(x: number): number;
-    cos(x: number): number;
-    tan(x: number): number;
-    sinh(x: number): number;
-    cosh(x: number): number;
-    tanh(x: number): number;
-    sqrt(x: number): number;
-    cbrt(x: number): number;
-    hypot(...vals: number[]): number;
-    imul(a: number, b: number): number;
-    exp(x: number): number;
-    expm1(x: number): number;
-    pow(x: number, y: number): number;
-    log(x: number): number;
-    log10(x: number): number;
-    log1p(x: number): number;
-    log2(x: number): number;
-    ceil(x: number): number;
-    floor(x: number): number;
-    round(x: number): number;
-    fround(x: number): number;
-    trunc(x: number): number;
-    abs(x: number): number;
-    max(...vals: number[]): number;
-    min(...vals: number[]): number;
-    sign(x: number): number;
-    random(): number;
-    clz32(x: number): number;
-}
-
-interface Array<T> extends IterableIterator<T> {
-    [i: number]: T;
-
-    length: number;
-
-    toString(): string;
-    // toLocaleString(): string;
-    join(separator?: string): string;
-    fill(val: T, start?: number, end?: number): T[];
-    pop(): T | undefined;
-    push(...items: T[]): number;
-    concat(...items: (T | T[])[]): T[];
-    concat(...items: (T | T[])[]): T[];
-    join(separator?: string): string;
-    reverse(): T[];
-    shift(): T | undefined;
-    slice(start?: number, end?: number): T[];
-    sort(compareFn?: (a: T, b: T) => number): this;
-    splice(start: number, deleteCount?: number | undefined, ...items: T[]): T[];
-    unshift(...items: T[]): number;
-    indexOf(searchElement: T, fromIndex?: number): number;
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    every(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): boolean;
-    some(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): boolean;
-    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
-    includes(el: any, start?: number): boolean;
-
-    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
-    filter(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): T[];
-    find(predicate: (value: T, index: number, array: T[]) => boolean, thisArg?: any): T[];
-    findIndex(predicate: (value: T, index: number, array: T[]) => boolean, thisArg?: any): number;
-    findLast(predicate: (value: T, index: number, array: T[]) => boolean, thisArg?: any): T[];
-    findLastIndex(predicate: (value: T, index: number, array: T[]) => boolean, thisArg?: any): number;
-
-    flat<D extends number = 1>(depth?: D): FlatArray<T, D>;
-    flatMap(func: (val: T, i: number, arr: T[]) => T | T[], thisAarg?: any): FlatArray<T[], 1>;
-    sort(func?: (a: T, b: T) => number): this;
-
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): T;
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue: T): T;
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): T;
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue: T): T;
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-
-    entries(): IterableIterator<[number, T]>;
-    values(): IterableIterator<T>;
-    keys(): IterableIterator<number>;
-}
-interface ArrayConstructor {
-    new <T>(arrayLength?: number): T[];
-    new <T>(...items: T[]): T[];
-    <T>(arrayLength?: number): T[];
-    <T>(...items: T[]): T[];
-    isArray(arg: any): arg is any[];
-    prototype: Array<any>;
-}
-
-interface Boolean {
-    toString(): string;
-    valueOf(): boolean;
-}
-interface BooleanConstructor {
-    (val: any): boolean;
-    new (val: any): Boolean;
-    prototype: Boolean;
-}
-
-interface Error {
-    name: string;
-    message: string;
-    stack: string[];
-    toString(): string;
-}
-interface ErrorConstructor {
-    (msg?: any): Error;
-    new (msg?: any): Error;
-    prototype: Error;
-}
-
-interface TypeErrorConstructor extends ErrorConstructor {
-    (msg?: any): TypeError;
-    new (msg?: any): TypeError;
-    prototype: Error;
-}
-interface TypeError extends Error {
-    name: 'TypeError';
-}
-
-interface RangeErrorConstructor extends ErrorConstructor {
-    (msg?: any): RangeError;
-    new (msg?: any): RangeError;
-    prototype: Error;
-}
-interface RangeError extends Error {
-    name: 'RangeError';
-}
-
-interface SyntaxErrorConstructor extends ErrorConstructor {
-    (msg?: any): RangeError;
-    new (msg?: any): RangeError;
-    prototype: Error;
-}
-interface SyntaxError extends Error {
-    name: 'SyntaxError';
-}
-
-interface Function {
-    apply(this: Function, thisArg: any, argArray?: any): any;
-    call(this: Function, thisArg: any, ...argArray: any[]): any;
-    bind(this: Function, thisArg: any, ...argArray: any[]): Function;
-
-    toString(): string;
-
-    prototype: any;
-    readonly length: number;
-    name: string;
-}
-interface CallableFunction extends Function {
-    (...args: any[]): any;
-    apply<ThisArg, Args extends any[], RetT>(this: (this: ThisArg, ...args: Args) => RetT, thisArg: ThisArg, argArray?: Args): RetT;
-    call<ThisArg, Args extends any[], RetT>(this: (this: ThisArg, ...args: Args) => RetT, thisArg: ThisArg, ...argArray: Args): RetT;
-    bind<ThisArg, Args extends any[], Rest extends any[], RetT>(this: (this: ThisArg, ...args: [ ...Args, ...Rest ]) => RetT, thisArg: ThisArg, ...argArray: Args): (this: void, ...args: Rest) => RetT;
-}
-interface NewableFunction extends Function {
-    new(...args: any[]): any;
-    apply<Args extends any[], RetT>(this: new (...args: Args) => RetT, thisArg: any, argArray?: Args): RetT;
-    call<Args extends any[], RetT>(this: new (...args: Args) => RetT, thisArg: any, ...argArray: Args): RetT;
-    bind<Args extends any[], RetT>(this: new (...args: Args) => RetT, thisArg: any, ...argArray: Args): new (...args: Args) => RetT;
-}
-interface FunctionConstructor extends Function {
-    (...args: string[]): (...args: any[]) => any;
-    new (...args: string[]): (...args: any[]) => any;
-    prototype: Function;
-    async<ArgsT extends any[], RetT>(
-        func: (await: <T>(val: T) => Awaited<T>) => (...args: ArgsT) => RetT
-    ): (...args: ArgsT) => Promise<RetT>;
-    asyncGenerator<ArgsT extends any[], RetT>(
-        func: (await: <T>(val: T) => Awaited<T>, _yield: <T>(val: T) => void) => (...args: ArgsT) => RetT
-    ): (...args: ArgsT) => AsyncGenerator<RetT>;
-    generator<ArgsT extends any[], T = unknown, RetT = unknown, TNext = unknown>(
-        func: (_yield: <T>(val: T) => TNext) => (...args: ArgsT) => RetT
-    ): (...args: ArgsT) => Generator<T, RetT, TNext>;
-}
-
-interface Number {
-    toString(): string;
-    valueOf(): number;
-}
-interface NumberConstructor {
-    (val: any): number;
-    new (val: any): Number;
-    prototype: Number;
-    parseInt(val: unknown): number;
-    parseFloat(val: unknown): number;
-}
-
-interface Object {
-    constructor: NewableFunction;
-    [Symbol.typeName]: string;
-
-    valueOf(): this;
-    toString(): string;
-    hasOwnProperty(key: any): boolean;
-}
-interface ObjectConstructor {
-    (arg: string): String;
-    (arg: number): Number;
-    (arg: boolean): Boolean;
-    (arg?: undefined | null): {};
-    <T extends object>(arg: T): T;
-
-    new (arg: string): String;
-    new (arg: number): Number;
-    new (arg: boolean): Boolean;
-    new (arg?: undefined | null): {};
-    new <T extends object>(arg: T): T;
-
-    prototype: Object;
-
-    assign<T extends object>(target: T, ...src: object[]): T;
-    create<T extends object>(proto: T, props?: { [key: string]: PropertyDescriptor<any, T> }): T;
-
-    keys<T extends object>(obj: T, onlyString?: true): (keyof T)[];
-    keys<T extends object>(obj: T, onlyString: false): any[];
-    entries<T extends object>(obj: T, onlyString?: true): [keyof T, T[keyof T]][];
-    entries<T extends object>(obj: T, onlyString: false): [any, any][];
-    values<T extends object>(obj: T, onlyString?: true): (T[keyof T])[];
-    values<T extends object>(obj: T, onlyString: false): any[];
-
-    fromEntries(entries: Iterable<[any, any]>): object;
-
-    defineProperty<T, ThisT extends object>(obj: ThisT, key: any, desc: PropertyDescriptor<T, ThisT>): ThisT;
-    defineProperties<ThisT extends object>(obj: ThisT, desc: { [key: string]: PropertyDescriptor<any, ThisT> }): ThisT;
-
-    getOwnPropertyNames<T extends object>(obj: T): (keyof T)[];
-    getOwnPropertySymbols<T extends object>(obj: T): (keyof T)[];
-    hasOwn<T extends object, KeyT>(obj: T, key: KeyT): boolean;
-
-    getOwnPropertyDescriptor<T extends object, KeyT extends keyof T>(obj: T, key: KeyT): PropertyDescriptor<T[KeyT], T>;
-    getOwnPropertyDescriptors<T extends object>(obj: T): { [x in keyof T]: PropertyDescriptor<T[x], T> };
-
-    getPrototypeOf(obj: any): object | null;
-    setPrototypeOf<T>(obj: T, proto: object | null): T;
-
-    preventExtensions<T extends object>(obj: T): T;
-    seal<T extends object>(obj: T): T;
-    freeze<T extends object>(obj: T): T;
-
-    isExtensible(obj: object): boolean;
-    isSealed(obj: object): boolean;
-    isFrozen(obj: object): boolean;
-}
-
-interface String {
-    [i: number]: string;
-
-    toString(): string;
-    valueOf(): string;
-
-    charAt(pos: number): string;
-    charCodeAt(pos: number): number;
-    substring(start?: number, end?: number): string;
-    slice(start?: number, end?: number): string;
-    substr(start?: number, length?: number): string;
-
-    startsWith(str: string, pos?: number): string;
-    endsWith(str: string, pos?: number): string;
-
-    replace(pattern: string | Replacer, val: string | ReplaceFunc): string;
-    replaceAll(pattern: string | Replacer, val: string | ReplaceFunc): string;
-
-    match(pattern: string | Matcher): RegExpResult | string[] | null;
-    matchAll(pattern: string | Matcher): IterableIterator<RegExpResult>;
-
-    split(pattern: string | Splitter, limit?: number, sensible?: boolean): string;
-
-    concat(...others: string[]): string;
-    indexOf(term: string | Searcher, start?: number): number;
-    lastIndexOf(term: string | Searcher, start?: number): number;
-
-    toLowerCase(): string;
-    toUpperCase(): string;
-
-    trim(): string;
-
-    includes(term: string, start?: number): boolean;
-
-    length: number;
-}
-interface StringConstructor {
-    (val: any): string;
-    new (val: any): String;
-
-    fromCharCode(val: number): string;
-
-    prototype: String;
-}
-
-interface Symbol {
-    valueOf(): symbol;
-}
-interface SymbolConstructor {
-    (val?: any): symbol;
-    new(...args: any[]): never;
-    prototype: Symbol;
-    for(key: string): symbol;
-    keyFor(sym: symbol): string;
-
-    readonly typeName: unique symbol;
-    readonly match: unique symbol;
-    readonly matchAll: unique symbol;
-    readonly split: unique symbol;
-    readonly replace: unique symbol;
-    readonly search: unique symbol;
-    readonly iterator: unique symbol;
-    readonly asyncIterator: unique symbol;
-}
-
-
-interface Promise<T> extends Thenable<T> {
-    catch<ResT = void>(func: (err: unknown) => ResT): Promise<ResT>;
-    finally(func: () => void): Promise<T>;
-    constructor: PromiseConstructor;
-}
-interface PromiseConstructorLike {
-    new <T>(func: (res: (val: T) => void, rej: (err: unknown) => void) => void): Thenable<Awaited<T>>;
-}
-interface PromiseConstructor extends PromiseConstructorLike {
-    prototype: Promise<any>;
-
-    new <T>(func: (res: (val: T) => void, rej: (err: unknown) => void) => void): Promise<Awaited<T>>;
-    resolve<T>(val: T): Promise<Awaited<T>>;
-    reject(val: any): Promise<never>;
-
-    isAwaitable(val: unknown): val is Thenable<any>;
-    any<T>(promises: T[]): Promise<Awaited<T>>;
-    race<T>(promises: (Promise<T>|T)[]): Promise<T>;
-    all<T extends any[]>(promises: T): Promise<{ [Key in keyof T]: Awaited<T[Key]> }>;
-    allSettled<T extends any[]>(...promises: T): Promise<[...{ [P in keyof T]: PromiseResult<Awaited<T[P]>>}]>;
-}
-
-interface FileStat {
-    type: 'file' | 'folder';
-    mode: 'r' | 'rw';
-}
-interface File {
-    readonly pointer: Promise<number>;
-    readonly length: Promise<number>;
-
-    read(n: number): Promise<number[]>;
-    write(buff: number[]): Promise<void>;
-    close(): Promise<void>;
-    seek(offset: number, whence: number): Promise<void>;
-}
-interface Filesystem {
-    readonly SEEK_SET: 0;
-    readonly SEEK_CUR: 1;
-    readonly SEEK_END: 2;
-
-    open(path: string, mode: 'r' | 'rw'): Promise<File>;
-    ls(path: string): AsyncIterableIterator<string>;
-    mkdir(path: string): Promise<void>;
-    mkfile(path: string): Promise<void>;
-    rm(path: string, recursive?: boolean): Promise<void>;
-    stat(path: string): Promise<FileStat>;
-    exists(path: string): Promise<boolean>;
-    normalize(...paths: string[]): string;
-}
-
-interface Encoding {
-    encode(val: string): number[];
-    decode(val: number[]): string;
-}
-
-declare var String: StringConstructor;
-//@ts-ignore
-declare const arguments: IArguments;
-declare var NaN: number;
-declare var Infinity: number;
-
-declare var setTimeout: <T extends any[]>(handle: (...args: [ ...T, ...any[] ]) => void, delay?: number, ...args: T) => number;
-declare var setInterval: <T extends any[]>(handle: (...args: [ ...T, ...any[] ]) => void, delay?: number, ...args: T) => number;
-
-declare var clearTimeout: (id: number) => void;
-declare var clearInterval: (id: number) => void;
-
-declare var parseInt: typeof Number.parseInt;
-declare var parseFloat: typeof Number.parseFloat;
-
-declare function log(...vals: any[]): void;
-declare function require(name: string): any;
-
-declare var Array: ArrayConstructor;
-declare var Boolean: BooleanConstructor;
-declare var Promise: PromiseConstructor;
-declare var Function: FunctionConstructor;
-declare var Number: NumberConstructor;
-declare var Object: ObjectConstructor;
-declare var Symbol: SymbolConstructor;
-declare var Promise: PromiseConstructor;
-declare var Math: MathObject;
-declare var Encoding: Encoding;
-declare var Filesystem: Filesystem;
-
-declare var Error: ErrorConstructor;
-declare var RangeError: RangeErrorConstructor;
-declare var TypeError: TypeErrorConstructor;
-declare var SyntaxError: SyntaxErrorConstructor;
-declare var self: typeof globalThis;
-
-declare class Map<KeyT, ValueT> {
-    public [Symbol.iterator](): IterableIterator<[KeyT, ValueT]>;
-
-    public clear(): void;
-    public delete(key: KeyT): boolean;
-
-    public entries(): IterableIterator<[KeyT, ValueT]>;
-    public keys(): IterableIterator<KeyT>;
-    public values(): IterableIterator<ValueT>;
-
-    public get(key: KeyT): ValueT;
-    public set(key: KeyT, val: ValueT): this;
-    public has(key: KeyT): boolean;
-
-    public get size(): number;
-
-    public forEach(func: (key: KeyT, val: ValueT, map: Map<KeyT, ValueT>) => void, thisArg?: any): void;
-
-    public constructor();
-}
-declare class Set<T> {
-    public [Symbol.iterator](): IterableIterator<T>;
-
-    public entries(): IterableIterator<[T, T]>;
-    public keys(): IterableIterator<T>;
-    public values(): IterableIterator<T>;
-
-    public clear(): void;
-
-    public add(val: T): this;
-    public delete(val: T): boolean;
-    public has(key: T): boolean;
-
-    public get size(): number;
-
-    public forEach(func: (key: T, set: Set<T>) => void, thisArg?: any): void;
-
-    public constructor();
-}
-
-declare class RegExp implements Matcher, Splitter, Replacer, Searcher {
-    static escape(raw: any, flags?: string): RegExp;
-
-    prototype: RegExp;
-
-    exec(val: string): RegExpResult | null;
-    test(val: string): boolean;
-    toString(): string;
-
-    [Symbol.match](target: string): RegExpResult | string[] | null;
-    [Symbol.matchAll](target: string): IterableIterator<RegExpResult>;
-    [Symbol.split](target: string, limit?: number, sensible?: boolean): string[];
-    [Symbol.replace](target: string, replacement: string | ReplaceFunc): string;
-    [Symbol.search](target: string, reverse?: boolean, start?: number): number;
-
-    readonly dotAll: boolean;
-    readonly global: boolean;
-    readonly hasIndices: boolean;
-    readonly ignoreCase: boolean;
-    readonly multiline: boolean;
-    readonly sticky: boolean;
-    readonly unicode: boolean;
-
-    readonly source: string;
-    readonly flags: string;
-
-    lastIndex: number;
-
-    constructor(pattern?: string, flags?: string);
-    constructor(pattern?: RegExp, flags?: string);
-}

src/assets/metadata.json

@@ -0,0 +1,5 @@
+{
+    "version": "${version}",
+    "name": "${name}",
+    "author": "TopchetoEU"
+}

src/java/me/topchetoeu/jscript/common/Buffer.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 public class Buffer {
     private byte[] data;

src/java/me/topchetoeu/jscript/common/Filename.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 import java.io.File;
 import java.nio.file.Path;

src/java/me/topchetoeu/jscript/common/Location.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 public class Location implements Comparable<Location> {
     public static final Location INTERNAL = new Location(0, 0, new Filename("jscript", "native"));

src/java/me/topchetoeu/jscript/common/Metadata.java

@@ -1,9 +1,18 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
+
+import me.topchetoeu.jscript.common.json.JSON;
 
 public class Metadata {
-    private static final String VERSION = "${VERSION}";
-    private static final String AUTHOR = "${AUTHOR}";
-    private static final String NAME = "${NAME}";
+    private static final String VERSION;
+    private static final String AUTHOR;
+    private static final String NAME;
+
+    static {
+        var data = JSON.parse(null, Reading.resourceToString("metadata.json")).map();
+        VERSION = data.string("version");
+        AUTHOR = data.string("author");
+        NAME = data.string("name");
+    }
 
     public static String version() {
         if (VERSION.equals("$" + "{VERSION}")) return "1337-devel";

src/java/me/topchetoeu/jscript/common/Reading.java

@@ -1,25 +1,31 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-
-import me.topchetoeu.jscript.exceptions.UncheckedException;
+import java.io.UncheckedIOException;
 
 public class Reading {
     private static final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
 
-    public static synchronized String read() throws IOException {
+    public static synchronized String readline() throws IOException {
         return reader.readLine();
     }
 
+    /**
+     * Reads the given stream to a string
+     * @param in 
+     * @return
+     */
     public static String streamToString(InputStream in) {
-        try { return new String(in.readAllBytes()); }
-        catch (Throwable e) { throw new UncheckedException(e); }
+        try {
+            return new String(in.readAllBytes());
+        }
+        catch (IOException e) { throw new UncheckedIOException(e); }
     }
     public static InputStream resourceToStream(String name) {
-        return Reading.class.getResourceAsStream("/assets/" + name);
+        return Reading.class.getResourceAsStream("/" + name);
     }
     public static String resourceToString(String name) {
         return streamToString(resourceToStream(name));

src/java/me/topchetoeu/jscript/common/ResultRunnable.java

@@ -0,0 +1,5 @@
+package me.topchetoeu.jscript.common;
+
+public interface ResultRunnable<T> {
+    T run();
+}

src/java/me/topchetoeu/jscript/common/VLQ.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.mapping;
+package me.topchetoeu.jscript.common;
 
 import java.util.ArrayList;
 import java.util.List;

src/java/me/topchetoeu/jscript/common/events/Awaitable.java

@@ -0,0 +1,27 @@
+package me.topchetoeu.jscript.common.events;
+
+public interface Awaitable<T> {
+    public static interface ResultHandler<T> {
+        public void onResult(T data);
+    }
+    public static interface ErrorHandler {
+        public void onError(RuntimeException error);
+    }
+
+    T await();
+
+    default void handle(ResultHandler<T> onResult, ErrorHandler onError) {
+        var thread = new Thread(() -> {
+            try {
+                onResult.onResult(await());
+            }
+            catch (RuntimeException e) {
+                onError.onError(e);
+            }
+        }, "Awaiter");
+        thread.start();
+    }
+    default void handle(ResultHandler<T> onResult) {
+        handle(onResult, err -> {});
+    }
+}

src/java/me/topchetoeu/jscript/common/events/DataNotifier.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.events;
+package me.topchetoeu.jscript.common.events;
 
 public class DataNotifier<T> implements Awaitable<T> {
     private Notifier notifier = new Notifier();
@@ -11,9 +11,6 @@ public class DataNotifier<T> implements Awaitable<T> {
         isErr = true;
         notifier.next();
     }
-    public void error(Throwable t) {
-        error(new RuntimeException(t));
-    }
     public void next(T val) {
         this.val = val;
         isErr = false;

src/java/me/topchetoeu/jscript/common/events/Notifier.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.events;
+package me.topchetoeu.jscript.common.events;
 
-import me.topchetoeu.jscript.exceptions.InterruptException;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
 
 public class Notifier {
     private boolean ok = false;

src/java/me/topchetoeu/jscript/common/json/JSON.java

@@ -1,20 +1,20 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.HashSet;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.parsing.Operator;
-import me.topchetoeu.jscript.parsing.ParseRes;
-import me.topchetoeu.jscript.parsing.Parsing;
-import me.topchetoeu.jscript.parsing.Token;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
+import me.topchetoeu.jscript.core.parsing.Operator;
+import me.topchetoeu.jscript.core.parsing.ParseRes;
+import me.topchetoeu.jscript.core.parsing.Parsing;
+import me.topchetoeu.jscript.core.parsing.Token;
 
 public class JSON {
     public static Object toJs(JSONElement val) {
@@ -58,8 +58,8 @@ public class JSON {
 
             var res = new JSONMap();
 
-            for (var el : ((ObjectValue)val).keys(false)) {
-                var jsonEl = fromJs(ctx, ((ObjectValue)val).getMember(ctx, el), prev);
+            for (var el : Values.getMembers(ctx, val, false, false)) {
+                var jsonEl = fromJs(ctx, Values.getMember(ctx, val, el), prev);
                 if (jsonEl == null) continue;
                 if (el instanceof String || el instanceof Number) res.put(el.toString(), jsonEl);
             }

src/java/me/topchetoeu/jscript/common/json/JSONElement.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 public class JSONElement {
     public static enum Type {

src/java/me/topchetoeu/jscript/common/json/JSONList.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.ArrayList;
 import java.util.Collection;

src/java/me/topchetoeu/jscript/common/json/JSONMap.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.Collection;
 import java.util.HashMap;

src/java/me/topchetoeu/jscript/core/compilation/AssignableStatement.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Operation;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Operation;
 
 public abstract class AssignableStatement extends Statement {
     public abstract Statement toAssign(Statement val, Operation operation);

src/java/me/topchetoeu/jscript/core/compilation/CalculateResult.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public final class CalculateResult {
     public final boolean exists;

src/java/me/topchetoeu/jscript/core/compilation/CompileTarget.java

@@ -1,14 +1,14 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.HashMap;
 import java.util.Map;
 import java.util.TreeSet;
 import java.util.Vector;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
 
 public class CompileTarget {
     public final Vector<Instruction> target = new Vector<>();

src/java/me/topchetoeu/jscript/core/compilation/CompoundStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.List;
 import java.util.Vector;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.values.FunctionStatement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.values.FunctionStatement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class CompoundStatement extends Statement {
     public final Statement[] statements;

src/java/me/topchetoeu/jscript/core/compilation/FunctionBody.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 public class FunctionBody {
     public final Instruction[] instructions;

src/java/me/topchetoeu/jscript/core/compilation/Instruction.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class Instruction {
     public static enum Type {

src/java/me/topchetoeu/jscript/core/compilation/Statement.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public abstract class Statement {
     private Location _loc;

src/java/me/topchetoeu/jscript/core/compilation/ThrowSyntaxStatement.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class ThrowSyntaxStatement extends Statement {
     public final String name;

src/java/me/topchetoeu/jscript/core/compilation/VariableDeclareStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.List;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.values.FunctionStatement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.values.FunctionStatement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableDeclareStatement extends Statement {
     public static class Pair {

src/java/me/topchetoeu/jscript/core/compilation/control/BreakStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class BreakStatement extends Statement {
     public final String label;

src/java/me/topchetoeu/jscript/core/compilation/control/ContinueStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ContinueStatement extends Statement {
     public final String label;

src/java/me/topchetoeu/jscript/core/compilation/control/DebugStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DebugStatement extends Statement {
     @Override

src/java/me/topchetoeu/jscript/core/compilation/control/DeleteStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DeleteStatement extends Statement {
     public final Statement key;

src/java/me/topchetoeu/jscript/core/compilation/control/DoWhileStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DoWhileStatement extends Statement {
     public final Statement condition, body;

src/java/me/topchetoeu/jscript/core/compilation/control/ForInStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ForInStatement extends Statement {
     public final String varName;

src/java/me/topchetoeu/jscript/core/compilation/control/ForStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ForStatement extends Statement {
     public final Statement declaration, assignment, condition, body;

src/java/me/topchetoeu/jscript/core/compilation/control/IfStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IfStatement extends Statement {
     public final Statement condition, body, elseBody;

src/java/me/topchetoeu/jscript/core/compilation/control/ReturnStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ReturnStatement extends Statement {
     public final Statement value;

src/java/me/topchetoeu/jscript/core/compilation/control/SwitchStatement.java

@@ -1,15 +1,15 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
 import java.util.HashMap;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class SwitchStatement extends Statement {
     public static class SwitchCase {

src/java/me/topchetoeu/jscript/core/compilation/control/ThrowStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ThrowStatement extends Statement {
     public final Statement value;

src/java/me/topchetoeu/jscript/core/compilation/control/TryStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.GlobalScope;
-import me.topchetoeu.jscript.engine.scope.LocalScopeRecord;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.GlobalScope;
+import me.topchetoeu.jscript.core.engine.scope.LocalScopeRecord;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class TryStatement extends Statement {
     public final Statement tryBody;

src/java/me/topchetoeu/jscript/core/compilation/control/WhileStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class WhileStatement extends Statement {
     public final Statement condition, body;

src/java/me/topchetoeu/jscript/core/compilation/values/ArrayStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ArrayStatement extends Statement {
     public final Statement[] statements;

src/java/me/topchetoeu/jscript/core/compilation/values/CallStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class CallStatement extends Statement {
     public final Statement func;

src/java/me/topchetoeu/jscript/core/compilation/values/ChangeStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ChangeStatement extends Statement {
     public final AssignableStatement value;

src/java/me/topchetoeu/jscript/core/compilation/values/ConstantStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ConstantStatement extends Statement {
     public final Object value;

src/java/me/topchetoeu/jscript/core/compilation/values/DiscardStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DiscardStatement extends Statement {
     public final Statement value;

src/java/me/topchetoeu/jscript/core/compilation/values/FunctionStatement.java

@@ -1,17 +1,17 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
 import java.util.Random;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.CompoundStatement;
-import me.topchetoeu.jscript.compilation.FunctionBody;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.CompoundStatement;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class FunctionStatement extends Statement {
     public final CompoundStatement body;

src/java/me/topchetoeu/jscript/core/compilation/values/GlobalThisStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class GlobalThisStatement extends Statement {
     @Override public boolean pure() { return true; }

src/java/me/topchetoeu/jscript/core/compilation/values/IndexAssignStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IndexAssignStatement extends Statement {
     public final Statement object;

src/java/me/topchetoeu/jscript/core/compilation/values/IndexStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IndexStatement extends AssignableStatement {
     public final Statement object;

src/java/me/topchetoeu/jscript/core/compilation/values/LazyAndStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class LazyAndStatement extends Statement {
     public final Statement first, second;

src/java/me/topchetoeu/jscript/core/compilation/values/LazyOrStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class LazyOrStatement extends Statement {
     public final Statement first, second;

src/java/me/topchetoeu/jscript/core/compilation/values/ObjectStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
 import java.util.ArrayList;
 import java.util.Map;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ObjectStatement extends Statement {
     public final Map<Object, Statement> map;

src/java/me/topchetoeu/jscript/core/compilation/values/OperationStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class OperationStatement extends Statement {
     public final Statement[] args;

src/java/me/topchetoeu/jscript/core/compilation/values/RegexStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class RegexStatement extends Statement {
     public final String pattern, flags;

src/java/me/topchetoeu/jscript/core/compilation/values/TypeofStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class TypeofStatement extends Statement {
     public final Statement value;

src/java/me/topchetoeu/jscript/core/compilation/values/VariableAssignStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableAssignStatement extends Statement {
     public final String name;

src/java/me/topchetoeu/jscript/core/compilation/values/VariableIndexStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableIndexStatement extends Statement {
     public final int index;

src/java/me/topchetoeu/jscript/core/compilation/values/VariableStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableStatement extends AssignableStatement {
     public final String name;

src/java/me/topchetoeu/jscript/core/engine/Context.java

@@ -0,0 +1,166 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.TreeSet;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.lib.EnvironmentLib;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
+
+public class Context implements Extensions {
+    public static final Context NULL = new Context(null);
+
+    public final Context parent;
+    public final Environment environment;
+    public final CodeFrame frame;
+    public final Engine engine;
+    public final int stackSize;
+
+    @Override public <T> void add(Symbol key, T obj) {
+        if (environment != null) environment.add(key, obj);
+        else if (engine != null) engine.add(key, obj);
+    }
+    @Override public <T> T get(Symbol key) {
+        if (environment != null && environment.has(key)) return environment.get(key);
+        else if (engine != null && engine.has(key)) return engine.get(key);
+        return null;
+    }
+    @Override public boolean has(Symbol key) {
+        return
+            environment != null && environment.has(key) ||
+            engine != null && engine.has(key);
+    }
+    @Override public boolean remove(Symbol key) {
+        var res = false;
+
+        if (environment != null) res |= environment.remove(key);
+        else if (engine != null) res |= engine.remove(key);
+
+        return res;
+    }
+    @Override public Iterable<Symbol> keys() {
+        if (engine == null && environment == null) return List.of();
+        if (engine == null) return environment.keys();
+        if (environment == null) return engine.keys();
+
+        return () -> Stream.concat(
+            StreamSupport.stream(engine.keys().spliterator(), false),
+            StreamSupport.stream(environment.keys().spliterator(), false)
+        ).distinct().iterator();
+    }
+
+    public FunctionValue compile(Filename filename, String raw) {
+        var env = environment;
+        var result = Environment.compileFunc(this).call(this, null, raw, filename.toString(), new EnvironmentLib(env));
+
+        var function = (FunctionValue)Values.getMember(this, result, "function");
+        if (!DebugContext.enabled(this)) return function;
+
+        var rawMapChain = ((ArrayValue)Values.getMember(this, result, "mapChain")).toArray();
+        var breakpoints = new TreeSet<>(
+            Arrays.stream(((ArrayValue)Values.getMember(this, result, "breakpoints")).toArray())
+                .map(v -> Location.parse(Values.toString(this, v)))
+                .collect(Collectors.toList())
+        );
+        var maps = new SourceMap[rawMapChain.length];
+
+        for (var i = 0; i < maps.length; i++) maps[i] = SourceMap.parse(Values.toString(this, (String)rawMapChain[i]));
+
+        var map = SourceMap.chain(maps);
+
+        if (map != null) {
+            var newBreakpoints = new TreeSet<Location>();
+            for (var bp : breakpoints) {
+                bp = map.toCompiled(bp);
+                if (bp != null) newBreakpoints.add(bp);
+            }
+            breakpoints = newBreakpoints;
+        }
+
+        DebugContext.get(this).onSource(filename, raw, breakpoints, map);
+
+        return function;
+    }
+
+    public Context pushFrame(CodeFrame frame) {
+        var res = new Context(this, frame.function.environment, frame, engine, stackSize + 1);
+        return res;
+    }
+
+    public Iterable<CodeFrame> frames() {
+        var self = this;
+        return () -> new Iterator<CodeFrame>() {
+            private Context curr = self;
+
+            private void update() {
+                while (curr != null && curr.frame == null) curr = curr.parent;
+            }
+
+            @Override public boolean hasNext() {
+                update();
+                return curr != null;
+            }
+            @Override public CodeFrame next() {
+                update();
+                var res = curr.frame;
+                curr = curr.parent;
+                return res;
+            }
+        };
+    }
+    public List<String> stackTrace() {
+        var res = new ArrayList<String>();
+
+        for (var el : frames()) {
+            var name = el.function.name;
+            Location loc = null;
+
+            for (var j = el.codePtr; j >= 0 && loc == null; j--) loc = el.function.body[j].location;
+            if (loc == null) loc = el.function.loc();
+
+            var trace = "";
+
+            if (loc != null) trace += "at " + loc.toString() + " ";
+            if (name != null && !name.equals("")) trace += "in " + name + " ";
+
+            trace = trace.trim();
+
+            if (!trace.equals("")) res.add(trace);
+        }
+
+        return res;
+    }
+
+    private Context(Context parent, Environment environment, CodeFrame frame, Engine engine, int stackSize) {
+        this.parent = parent;
+        this.environment = environment;
+        this.frame = frame;
+        this.engine = engine;
+        this.stackSize = stackSize;
+
+        if (hasNotNull(Environment.MAX_STACK_COUNT) && stackSize > (int)get(Environment.MAX_STACK_COUNT)) {
+            throw EngineException.ofRange("Stack overflow!");
+        }
+    }
+
+    public Context(Engine engine) {
+        this(null, null, null, engine, 0);
+    }
+    public Context(Engine engine, Environment env) {
+        this(null, env, null, engine, 0);
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/Engine.java

@@ -0,0 +1,57 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.HashMap;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.events.Awaitable;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+
+public class Engine extends EventLoop implements Extensions {
+    public static final HashMap<Long, FunctionBody> functions = new HashMap<>();
+
+    private final Environment env = new Environment();
+
+    @Override
+    public <T> void add(Symbol key, T obj) {
+        this.env.add(key, obj);
+    }
+    @Override
+    public <T> T get(Symbol key) {
+        return this.env.get(key);
+    }
+    @Override
+    public boolean has(Symbol key) {
+        return this.env.has(key);
+    }
+    @Override
+    public boolean remove(Symbol key) {
+        return this.env.remove(key);
+    }
+    @Override
+    public Iterable<Symbol> keys() {
+        return env.keys();
+    }
+
+    public Engine copy() {
+        var res = new Engine();
+        res.env.addAll(env);
+        return res;
+    }
+
+    public Awaitable<Object> pushMsg(boolean micro, Environment env, FunctionValue func, Object thisArg, Object ...args) {
+        return pushMsg(() -> {
+            return func.call(new Context(this, env), thisArg, args);
+        }, micro);
+    }
+    public Awaitable<Object> pushMsg(boolean micro, Environment env, Filename filename, String raw, Object thisArg, Object ...args) {
+        return pushMsg(() -> {
+            var ctx = new Context(this, env);
+            return ctx.compile(filename, raw).call(new Context(this, env), thisArg, args);
+        }, micro);
+    }
+
+    public Engine() {
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/Environment.java

@@ -0,0 +1,128 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.HashMap;
+import java.util.stream.Collectors;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.scope.GlobalScope;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.NativeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.parsing.Parsing;
+import me.topchetoeu.jscript.utils.interop.NativeWrapperProvider;
+
+@SuppressWarnings("unchecked")
+public class Environment implements Extensions {
+
+    public static final HashMap<String, Symbol> symbols = new HashMap<>();
+
+    public static final Symbol WRAPPERS = Symbol.get("Environment.wrappers");
+    public static final Symbol COMPILE_FUNC = Symbol.get("Environment.compile");
+
+    public static final Symbol REGEX_CONSTR = Symbol.get("Environment.regexConstructor");
+    public static final Symbol STACK = Symbol.get("Environment.stack");
+    public static final Symbol MAX_STACK_COUNT = Symbol.get("Environment.maxStackCount");
+    public static final Symbol HIDE_STACK = Symbol.get("Environment.hideStack");
+
+    public static final Symbol OBJECT_PROTO = Symbol.get("Environment.objectPrototype");
+    public static final Symbol FUNCTION_PROTO = Symbol.get("Environment.functionPrototype");
+    public static final Symbol ARRAY_PROTO = Symbol.get("Environment.arrayPrototype");
+    public static final Symbol BOOL_PROTO = Symbol.get("Environment.boolPrototype");
+    public static final Symbol NUMBER_PROTO = Symbol.get("Environment.numberPrototype");
+    public static final Symbol STRING_PROTO = Symbol.get("Environment.stringPrototype");
+    public static final Symbol SYMBOL_PROTO = Symbol.get("Environment.symbolPrototype");
+    public static final Symbol ERROR_PROTO = Symbol.get("Environment.errorPrototype");
+    public static final Symbol SYNTAX_ERR_PROTO = Symbol.get("Environment.syntaxErrorPrototype");
+    public static final Symbol TYPE_ERR_PROTO = Symbol.get("Environment.typeErrorPrototype");
+    public static final Symbol RANGE_ERR_PROTO = Symbol.get("Environment.rangeErrorPrototype");
+
+    private HashMap<Symbol, Object> data = new HashMap<>();
+
+    public GlobalScope global;
+    public WrapperProvider wrappers;
+
+    @Override public <T> void add(Symbol key, T obj) {
+        data.put(key, obj);
+    }
+    @Override public <T> T get(Symbol key) {
+        return (T)data.get(key);
+    }
+    @Override public boolean remove(Symbol key) {
+        if (data.containsKey(key)) {
+            data.remove(key);
+            return true;
+        }
+        return false;
+    }
+    @Override public boolean has(Symbol key) {
+        return data.containsKey(key);
+    }
+    @Override public Iterable<Symbol> keys() {
+        return data.keySet();
+    }
+
+    public static FunctionValue compileFunc(Extensions ext) {
+        return ext.init(COMPILE_FUNC, new NativeFunction("compile", args -> {
+            var source = args.getString(0);
+            var filename = args.getString(1);
+            var env = Values.wrapper(Values.getMember(args.ctx, args.get(2), Symbol.get("env")), Environment.class);
+            var isDebug = DebugContext.enabled(args.ctx);
+            var res = new ObjectValue();
+
+            var target = Parsing.compile(env, Filename.parse(filename), source);
+            Engine.functions.putAll(target.functions);
+            Engine.functions.remove(0l);
+
+            res.defineProperty(args.ctx, "function", target.func(env));
+            res.defineProperty(args.ctx, "mapChain", new ArrayValue());
+
+            if (isDebug) res.defineProperty(
+                args.ctx, "breakpoints",
+                ArrayValue.of(args.ctx, target.breakpoints.stream().map(Location::toString).collect(Collectors.toList()))
+            );
+
+            return res;
+        }));
+    }
+    public static FunctionValue regexConstructor(Extensions ext) {
+        return ext.init(COMPILE_FUNC, new NativeFunction("RegExp", args -> {
+            throw EngineException.ofError("Regular expressions not supported.").setCtx(args.ctx.environment, args.ctx.engine);
+        }));
+    }
+
+    public Environment copy() {
+        var res = new Environment(null, global);
+
+        res.wrappers = wrappers.fork(res);
+        res.global = global;
+        res.data.putAll(data);
+
+        return res;
+    }
+    public Environment child() {
+        var res = copy();
+        res.global = res.global.globalChild();
+        return res;
+    }
+
+    public Context context(Engine engine) {
+        return new Context(engine, this);
+    }
+
+    public Environment(WrapperProvider nativeConverter, GlobalScope global) {
+        if (nativeConverter == null) nativeConverter = new NativeWrapperProvider(this);
+        if (global == null) global = new GlobalScope();
+
+        this.wrappers = nativeConverter;
+        this.global = global;
+    }
+    public Environment() {
+        this(null, null);
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/EventLoop.java

@@ -0,0 +1,81 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.concurrent.PriorityBlockingQueue;
+
+import me.topchetoeu.jscript.common.ResultRunnable;
+import me.topchetoeu.jscript.common.events.Awaitable;
+import me.topchetoeu.jscript.common.events.DataNotifier;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
+
+public class EventLoop {
+    private static class Task implements Comparable<Task> {
+        public final ResultRunnable<?> runnable;
+        public final DataNotifier<Object> notifier = new DataNotifier<>();
+        public final boolean micro;
+
+        public Task(ResultRunnable<?> runnable, boolean micro) {
+            this.runnable = runnable;
+            this.micro = micro;
+        }
+
+        @Override
+        public int compareTo(Task other) {
+            return Integer.compare(this.micro ? 0 : 1, other.micro ? 0 : 1);
+        }
+    }
+
+    private PriorityBlockingQueue<Task> tasks = new PriorityBlockingQueue<>();
+    private Thread thread;
+
+    @SuppressWarnings("unchecked")
+    public <T> Awaitable<T> pushMsg(ResultRunnable<T> runnable, boolean micro) {
+        var msg = new Task(runnable, micro);
+        tasks.add(msg);
+        return (Awaitable<T>)msg.notifier;
+    }
+    public Awaitable<Object> pushMsg(Runnable runnable, boolean micro) {
+        return pushMsg(() -> { runnable.run(); return null; }, micro);
+    }
+
+    public void run(boolean untilEmpty) {
+        while (!untilEmpty || !tasks.isEmpty()) {
+            try {
+                var task = tasks.take();
+
+                try {
+                    task.notifier.next(task.runnable.run());
+                }
+                catch (RuntimeException e) {
+                    if (e instanceof InterruptException) throw e;
+                    task.notifier.error(e);
+                }
+            }
+            catch (InterruptedException | InterruptException e) {
+                for (var msg : tasks) msg.notifier.error(new InterruptException(e));
+                break;
+            }
+        }
+    }
+
+    public Thread thread() {
+        return thread;
+    }
+    public Thread start() {
+        if (thread == null) {
+            thread = new Thread(() -> run(false), "Event loop #" + hashCode());
+            thread.start();
+        }
+        return thread;
+    }
+    public void stop() {
+        if (thread != null) thread.interrupt();
+        thread = null;
+    }
+
+    public boolean inLoopThread() {
+        return Thread.currentThread() == thread;
+    }
+    public boolean isRunning() {
+        return this.thread != null;
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/Extensions.java

@@ -0,0 +1,34 @@
+package me.topchetoeu.jscript.core.engine;
+
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+
+public interface Extensions {
+    <T> T get(Symbol key);
+    <T> void add(Symbol key, T obj);
+    Iterable<Symbol> keys();
+
+    boolean has(Symbol key);
+    boolean remove(Symbol key);
+
+    default boolean hasNotNull(Symbol key) {
+        return has(key) && get(key) != null;
+    }
+
+    default <T> T get(Symbol key, T defaultVal) {
+        if (has(key)) return get(key);
+        else return defaultVal;
+    }
+
+    default <T> T init(Symbol key, T val) {
+        if (has(key)) return get(key);
+        else {
+            add(key, val);
+            return val;
+        }
+    }
+    default void addAll(Extensions source) {
+        for (var key : source.keys()) {
+            add(key, source.get(key));
+        }
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/Operation.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine;
+package me.topchetoeu.jscript.core.engine;
 
 public enum Operation {
     INSTANCEOF(2, false),

src/java/me/topchetoeu/jscript/core/engine/WrapperProvider.java

@@ -0,0 +1,12 @@
+package me.topchetoeu.jscript.core.engine;
+
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+
+public interface WrapperProvider {
+    public ObjectValue getProto(Class<?> obj);
+    public ObjectValue getNamespace(Class<?> obj);
+    public FunctionValue getConstr(Class<?> obj);
+
+    public WrapperProvider fork(Environment env);
+}

src/java/me/topchetoeu/jscript/core/engine/debug/DebugContext.java

@@ -0,0 +1,100 @@
+package me.topchetoeu.jscript.core.engine.debug;
+
+import java.util.HashMap;
+import java.util.TreeSet;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Extensions;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
+
+public class DebugContext implements DebugController {
+    public static final Symbol ENV_KEY = Symbol.get("Engine.debug");
+    public static final Symbol IGNORE = Symbol.get("Engine.ignoreDebug");
+
+    private HashMap<Filename, String> sources;
+    private HashMap<Filename, TreeSet<Location>> bpts;
+    private HashMap<Filename, SourceMap> maps;
+    private DebugController debugger;
+
+    public boolean attachDebugger(DebugController debugger) {
+        if (this.debugger != null) return false;
+
+        if (sources != null) {
+            for (var source : sources.entrySet()) debugger.onSource(
+                source.getKey(), source.getValue(),
+                bpts.get(source.getKey()),
+                maps.get(source.getKey())
+            );
+        }
+
+        this.debugger = debugger;
+        return true;
+    }
+    public boolean detachDebugger() {
+        this.debugger = null;
+        return true;
+    }
+
+    public DebugController debugger() {
+        if (debugger == null) return DebugController.empty();
+        else return debugger;
+    }
+
+    @Override public void onFramePop(Context ctx, CodeFrame frame) {
+        if (debugger != null) debugger.onFramePop(ctx, frame);
+    }
+    @Override public void onFramePush(Context ctx, CodeFrame frame) {
+        if (debugger != null) debugger.onFramePush(ctx, frame);
+    }
+    @Override public boolean onInstruction(Context ctx, CodeFrame frame, Instruction instruction, Object returnVal, EngineException error, boolean caught) {
+        if (debugger != null) return debugger.onInstruction(ctx, frame, instruction, returnVal, error, caught);
+        else return false;
+    }
+    @Override public void onSource(Filename filename, String source, TreeSet<Location> breakpoints, SourceMap map) {
+        if (debugger != null) debugger.onSource(filename, source, breakpoints, map);
+        if (sources != null) sources.put(filename, source);
+        if (bpts != null) bpts.put(filename, breakpoints);
+        if (maps != null) maps.put(filename, map);
+    }
+
+    public Location mapToCompiled(Location location) {
+        if (maps == null) return location;
+
+        var map = maps.get(location.filename());
+        if (map == null) return location;
+        return map.toCompiled(location);
+    }
+    public Location mapToOriginal(Location location) {
+        if (maps == null) return location;
+
+        var map = maps.get(location.filename());
+        if (map == null) return location;
+        return map.toOriginal(location);
+    }
+
+    private DebugContext(boolean enabled) {
+        if (enabled) {
+            sources = new HashMap<>();
+            bpts = new HashMap<>();
+            maps = new HashMap<>();
+        }
+    }
+
+    public DebugContext() {
+        this(true);
+    }
+
+    public static boolean enabled(Extensions exts) {
+        return exts.hasNotNull(ENV_KEY) && !exts.has(IGNORE);
+    }
+    public static DebugContext get(Extensions exts) {
+        if (enabled(exts)) return exts.get(ENV_KEY);
+        else return new DebugContext(false);
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/debug/DebugController.java

@@ -1,14 +1,14 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 import java.util.TreeSet;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.frame.CodeFrame;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.mapping.SourceMap;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
 
 public interface DebugController {
     /**
@@ -27,7 +27,7 @@ public interface DebugController {
      * @param frame The frame in which execution is occuring
      * @param instruction The instruction which was or will be executed
      * @param loc The most recent location the code frame has been at
-     * @param returnVal The return value of the instruction, Runners.NO_RETURN if none
+     * @param returnVal The return value of the instruction, Values.NO_RETURN if none
      * @param error The error that the instruction threw, null if none
      * @param caught Whether or not the error has been caught
      * @return Whether or not the frame should restart
@@ -48,4 +48,15 @@ public interface DebugController {
      * @param frame The code frame which was popped out
      */
     void onFramePop(Context ctx, CodeFrame frame);
+
+    public static DebugController empty() {
+        return new DebugController () {
+            @Override public void onFramePop(Context ctx, CodeFrame frame) { }
+            @Override public void onFramePush(Context ctx, CodeFrame frame) { }
+            @Override public boolean onInstruction(Context ctx, CodeFrame frame, Instruction instruction, Object returnVal, EngineException error, boolean caught) {
+                return false;
+            }
+            @Override public void onSource(Filename filename, String source, TreeSet<Location> breakpoints, SourceMap map) { }
+        };
+    }
 }

src/java/me/topchetoeu/jscript/core/engine/frame/CodeFrame.java

@@ -1,20 +1,21 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 import java.util.List;
 import java.util.Stack;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.scope.LocalScope;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.ScopeValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.InterruptException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.scope.LocalScope;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.ScopeValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
 
 public class CodeFrame {
     public static enum TryState {
@@ -37,8 +38,10 @@ public class CodeFrame {
             return ptr >= start && ptr < end;
         }
 
+        public void setCause(EngineException target) {
+            if (error != null) target.setCause(error);
+        }
         public TryCtx _catch(EngineException e) {
-            if (error != null) e.setCause(error);
             return new TryCtx(TryState.CATCH, e, result, restoreStackPtr, start, end, -1, finallyStart);
         }
         public TryCtx _finally(PendingResult res) {
@@ -93,13 +96,14 @@ public class CodeFrame {
     public final Object[] args;
     public final Stack<TryCtx> tryStack = new Stack<>();
     public final CodeFunction function;
+    public final Context ctx;
     public Object[] stack = new Object[32];
     public int stackPtr = 0;
     public int codePtr = 0;
     public boolean jumpFlag = false, popTryFlag = false;
     private Location prevLoc = null;
 
-    public ObjectValue getLocalScope(Context ctx, boolean props) {
+    public ObjectValue getLocalScope(boolean props) {
         var names = new String[scope.locals.length];
 
         for (int i = 0; i < scope.locals.length; i++) {
@@ -114,7 +118,7 @@ public class CodeFrame {
 
         return new ScopeValue(scope.locals, names);
     }
-    public ObjectValue getCaptureScope(Context ctx, boolean props) {
+    public ObjectValue getCaptureScope(boolean props) {
         var names = new String[scope.captures.length];
 
         for (int i = 0; i < scope.captures.length; i++) {
@@ -125,7 +129,7 @@ public class CodeFrame {
 
         return new ScopeValue(scope.captures, names);
     }
-    public ObjectValue getValStackScope(Context ctx) {
+    public ObjectValue getValStackScope() {
         return new ObjectValue() {
             @Override
             protected Object getField(Context ctx, Object key) {
@@ -177,7 +181,7 @@ public class CodeFrame {
 
         return res;
     }
-    public void push(Context ctx, Object val) {
+    public void push(Object val) {
         if (stack.length <= stackPtr) {
             var newStack = new Object[stack.length * 2];
             System.arraycopy(stack, 0, newStack, 0, stack.length);
@@ -186,20 +190,19 @@ public class CodeFrame {
         stack[stackPtr++] = Values.normalize(ctx, val);
     }
 
-    public Object next(Context ctx, Object value, Object returnValue, EngineException error) {
-        if (value != Runners.NO_RETURN) push(ctx, value);
+    public Object next(Object value, Object returnValue, EngineException error) {
+        if (value != Values.NO_RETURN) push(value);
 
         Instruction instr = null;
         if (codePtr >= 0 && codePtr < function.body.length) instr = function.body[codePtr];
 
-        if (returnValue == Runners.NO_RETURN && error == null) {
+        if (returnValue == Values.NO_RETURN && error == null) {
             try {
                 if (Thread.currentThread().isInterrupted()) throw new InterruptException();
 
                 if (instr == null) returnValue = null;
                 else {
-                // System.out.println(instr + "@" + instr.location);
-                    ctx.engine.onInstruction(ctx, this, instr, Runners.NO_RETURN, null, false);
+                    DebugContext.get(ctx).onInstruction(ctx, this, instr, Values.NO_RETURN, null, false);
 
                     if (instr.location != null) prevLoc = instr.location;
 
@@ -220,10 +223,11 @@ public class CodeFrame {
             TryCtx newCtx = null;
 
             if (error != null) {
+                tryCtx.setCause(error);
                 if (tryCtx.hasCatch()) newCtx = tryCtx._catch(error);
                 else if (tryCtx.hasFinally()) newCtx = tryCtx._finally(PendingResult.ofThrow(error, instr));
             }
-            else if (returnValue != Runners.NO_RETURN) {
+            else if (returnValue != Values.NO_RETURN) {
                 if (tryCtx.hasFinally()) newCtx = tryCtx._finally(PendingResult.ofReturn(returnValue, instr));
             }
             else if (jumpFlag && !tryCtx.inBounds(codePtr)) {
@@ -250,7 +254,7 @@ public class CodeFrame {
                     tryStack.push(newCtx);
                 }
                 error = null;
-                returnValue = Runners.NO_RETURN;
+                returnValue = Values.NO_RETURN;
                 break;
             }
             else {
@@ -268,15 +272,17 @@ public class CodeFrame {
                     tryStack.pop();
                     codePtr = tryCtx.end;
                     if (tryCtx.result.instruction != null) instr = tryCtx.result.instruction;
-                    if (tryCtx.result.isJump) {
-                        codePtr = tryCtx.result.ptr;
-                        jumpFlag = true;
+                    if (!jumpFlag && returnValue == Values.NO_RETURN && error == null) {
+                        if (tryCtx.result.isJump) {
+                            codePtr = tryCtx.result.ptr;
+                            jumpFlag = true;
+                        }
+                        if (tryCtx.result.isReturn) returnValue = tryCtx.result.value;
+                        if (error == null && tryCtx.result.isThrow) {
+                            error = tryCtx.result.error;
+                        }
                     }
-                    if (tryCtx.result.isReturn) returnValue = tryCtx.result.value;
-                    if (tryCtx.result.isThrow) {
-                        error = tryCtx.result.error;
-                    }
-                    if (error != null) error.setCause(tryCtx.error);
+                    if (error != null) tryCtx.setCause(error);
                     continue;
                 }
             }
@@ -291,15 +297,22 @@ public class CodeFrame {
                 }
             }
 
-            ctx.engine.onInstruction(ctx, this, instr, null, error, caught);
+            DebugContext.get(ctx).onInstruction(ctx, this, instr, null, error, caught);
             throw error;
         }
-        if (returnValue != Runners.NO_RETURN) {
-            ctx.engine.onInstruction(ctx, this, instr, returnValue, null, false);
+        if (returnValue != Values.NO_RETURN) {
+            DebugContext.get(ctx).onInstruction(ctx, this, instr, returnValue, null, false);
             return returnValue;
         }
 
-        return Runners.NO_RETURN;
+        return Values.NO_RETURN;
+    }
+
+    public void onPush() {
+        DebugContext.get(ctx).onFramePush(ctx, this);
+    }
+    public void onPop() {
+        DebugContext.get(ctx.parent).onFramePop(ctx.parent, this);
     }
 
     public CodeFrame(Context ctx, Object thisArg, Object[] args, CodeFunction func) {
@@ -314,5 +327,6 @@ public class CodeFrame {
 
         this.thisArg = thisArg;
         this.function = func;
+        this.ctx = ctx.pushFrame(this);
     }
 }

src/java/me/topchetoeu/jscript/core/engine/frame/ConvertHint.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 public enum ConvertHint {
     TOSTRING,

src/java/me/topchetoeu/jscript/core/engine/frame/Runners.java

@@ -1,22 +1,22 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 import java.util.Collections;
 
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Engine;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Symbol;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Engine;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
 
 public class Runners {
-    public static final Object NO_RETURN = new Object();
-
     public static Object execReturn(Context ctx, Instruction instr, CodeFrame frame) {
         return frame.pop();
     }
@@ -32,26 +32,26 @@ public class Runners {
         var func = frame.pop();
         var thisArg = frame.pop();
 
-        frame.push(ctx, Values.call(ctx, func, thisArg, callArgs));
+        frame.push(Values.call(ctx, func, thisArg, callArgs));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execCallNew(Context ctx, Instruction instr, CodeFrame frame) {
         var callArgs = frame.take(instr.get(0));
         var funcObj = frame.pop();
 
-        frame.push(ctx, Values.callNew(ctx, funcObj, callArgs));
+        frame.push(Values.callNew(ctx, funcObj, callArgs));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execMakeVar(Context ctx, Instruction instr, CodeFrame frame) {
         var name = (String)instr.get(0);
-        ctx.environment().global.define(name);
+        ctx.environment.global.define(name);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execDefProp(Context ctx, Instruction instr, CodeFrame frame) {
         var setter = frame.pop();
@@ -59,14 +59,14 @@ public class Runners {
         var name = frame.pop();
         var obj = frame.pop();
 
-        if (getter != null && !Values.isFunction(getter)) throw EngineException.ofType("Getter must be a function or undefined.");
-        if (setter != null && !Values.isFunction(setter)) throw EngineException.ofType("Setter must be a function or undefined.");
-        if (!Values.isObject(obj)) throw EngineException.ofType("Property apply target must be an object.");
+        if (getter != null && !(getter instanceof FunctionValue)) throw EngineException.ofType("Getter must be a function or undefined.");
+        if (setter != null && !(setter instanceof FunctionValue)) throw EngineException.ofType("Setter must be a function or undefined.");
+        if (!(obj instanceof ObjectValue)) throw EngineException.ofType("Property apply target must be an object.");
         Values.object(obj).defineProperty(ctx, name, Values.function(getter), Values.function(setter), false, false);
 
-        frame.push(ctx, obj);
+        frame.push(obj);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execInstanceof(Context ctx, Instruction instr, CodeFrame frame) {
         var type = frame.pop();
@@ -74,14 +74,14 @@ public class Runners {
 
         if (!Values.isPrimitive(type)) {
             var proto = Values.getMember(ctx, type, "prototype");
-            frame.push(ctx, Values.isInstanceOf(ctx, obj, proto));
+            frame.push(Values.isInstanceOf(ctx, obj, proto));
         }
         else {
-            frame.push(ctx, false);
+            frame.push(false);
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execKeys(Context ctx, Instruction instr, CodeFrame frame) {
         var val = frame.pop();
@@ -89,17 +89,17 @@ public class Runners {
         var members = Values.getMembers(ctx, val, false, false);
         Collections.reverse(members);
 
-        frame.push(ctx, null);
+        frame.push(null);
 
         for (var el : members) {
             if (el instanceof Symbol) continue;
             var obj = new ObjectValue();
             obj.defineProperty(ctx, "value", el);
-            frame.push(ctx, obj);
+            frame.push(obj);
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execTryStart(Context ctx, Instruction instr, CodeFrame frame) {
@@ -111,58 +111,58 @@ public class Runners {
         int end = (int)instr.get(2) + start;
         frame.addTry(start, end, catchStart, finallyStart);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execTryEnd(Context ctx, Instruction instr, CodeFrame frame) {
         frame.popTryFlag = true;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDup(Context ctx, Instruction instr, CodeFrame frame) {
         int count = instr.get(0);
 
         for (var i = 0; i < count; i++) {
-            frame.push(ctx, frame.peek(count - 1));
+            frame.push(frame.peek(count - 1));
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadUndefined(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, null);
+        frame.push(null);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadValue(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, instr.get(0));
+        frame.push(instr.get(0));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadVar(Context ctx, Instruction instr, CodeFrame frame) {
         var i = instr.get(0);
 
-        if (i instanceof String) frame.push(ctx, ctx.environment().global.get(ctx, (String)i));
-        else frame.push(ctx, frame.scope.get((int)i).get(ctx));
+        if (i instanceof String) frame.push(ctx.environment.global.get(ctx, (String)i));
+        else frame.push(frame.scope.get((int)i).get(ctx));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadObj(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, new ObjectValue());
+        frame.push(new ObjectValue());
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadGlob(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, ctx.environment().global.obj);
+        frame.push(ctx.environment.global.obj);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadArr(Context ctx, Instruction instr, CodeFrame frame) {
         var res = new ArrayValue();
         res.setSize(instr.get(0));
-        frame.push(ctx, res);
+        frame.push(res);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadFunc(Context ctx, Instruction instr, CodeFrame frame) {
         long id = (Long)instr.get(0);
@@ -172,40 +172,45 @@ public class Runners {
             captures[i - 1] = frame.scope.get(instr.get(i));
         }
 
-        var func = new CodeFunction(ctx.environment(), "", Engine.functions.get(id), captures);
+        var func = new CodeFunction(ctx.environment, "", Engine.functions.get(id), captures);
 
-        frame.push(ctx, func);
+        frame.push(func);
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadMember(Context ctx, Instruction instr, CodeFrame frame) {
         var key = frame.pop();
         var obj = frame.pop();
 
         try {
-            frame.push(ctx, Values.getMember(ctx, obj, key));
+            frame.push(Values.getMember(ctx, obj, key));
         }
         catch (IllegalArgumentException e) {
             throw EngineException.ofType(e.getMessage());
         }
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadKeyMember(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, instr.get(0));
+        frame.push(instr.get(0));
         return execLoadMember(ctx, instr, frame);
     }
     public static Object execLoadRegEx(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, ctx.environment().regexConstructor.call(ctx, null, instr.get(0), instr.get(1)));
+        if (ctx.hasNotNull(Environment.REGEX_CONSTR)) {
+            frame.push(Values.callNew(ctx, ctx.get(Environment.REGEX_CONSTR), instr.get(0), instr.get(1)));
+        }
+        else {
+            throw EngineException.ofSyntax("Regex is not supported.");
+        }
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDiscard(Context ctx, Instruction instr, CodeFrame frame) {
         frame.pop();
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreMember(Context ctx, Instruction instr, CodeFrame frame) {
         var val = frame.pop();
@@ -213,30 +218,30 @@ public class Runners {
         var obj = frame.pop();
 
         if (!Values.setMember(ctx, obj, key, val)) throw EngineException.ofSyntax("Can't set member '" + key + "'.");
-        if ((boolean)instr.get(0)) frame.push(ctx, val);
+        if ((boolean)instr.get(0)) frame.push(val);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreVar(Context ctx, Instruction instr, CodeFrame frame) {
         var val = (boolean)instr.get(1) ? frame.peek() : frame.pop();
         var i = instr.get(0);
 
-        if (i instanceof String) ctx.environment().global.set(ctx, (String)i, val);
+        if (i instanceof String) ctx.environment.global.set(ctx, (String)i, val);
         else frame.scope.get((int)i).set(ctx, val);
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreSelfFunc(Context ctx, Instruction instr, CodeFrame frame) {
         frame.scope.locals[(int)instr.get(0)].set(ctx, frame.function);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     
     public static Object execJmp(Context ctx, Instruction instr, CodeFrame frame) {
         frame.codePtr += (int)instr.get(0);
         frame.jumpFlag = true;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execJmpIf(Context ctx, Instruction instr, CodeFrame frame) {
         if (Values.toBoolean(frame.pop())) {
@@ -244,7 +249,7 @@ public class Runners {
             frame.jumpFlag = true;
         }
         else frame.codePtr ++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execJmpIfNot(Context ctx, Instruction instr, CodeFrame frame) {
         if (Values.not(frame.pop())) {
@@ -252,37 +257,37 @@ public class Runners {
             frame.jumpFlag = true;
         }
         else frame.codePtr ++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execIn(Context ctx, Instruction instr, CodeFrame frame) {
         var obj = frame.pop();
         var index = frame.pop();
 
-        frame.push(ctx, Values.hasMember(ctx, obj, index, false));
+        frame.push(Values.hasMember(ctx, obj, index, false));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execTypeof(Context ctx, Instruction instr, CodeFrame frame) {
         String name = instr.get(0);
         Object obj;
 
         if (name != null) {
-            if (ctx.environment().global.has(ctx, name)) {
-                obj = ctx.environment().global.get(ctx, name);
+            if (ctx.environment.global.has(ctx, name)) {
+                obj = ctx.environment.global.get(ctx, name);
             }
             else obj = null;
         }
         else obj = frame.pop();
 
-        frame.push(ctx, Values.type(obj));
+        frame.push(Values.type(obj));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execNop(Context ctx, Instruction instr, CodeFrame frame) {
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDelete(Context ctx, Instruction instr, CodeFrame frame) {
@@ -291,7 +296,7 @@ public class Runners {
 
         if (!Values.deleteMember(ctx, val, key)) throw EngineException.ofSyntax("Can't delete member '" + key + "'.");
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execOperation(Context ctx, Instruction instr, CodeFrame frame) {
@@ -300,9 +305,9 @@ public class Runners {
 
         for (var i = op.operands - 1; i >= 0; i--) args[i] = frame.pop();
 
-        frame.push(ctx, Values.operation(ctx, op, args));
+        frame.push(Values.operation(ctx, op, args));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object exec(Context ctx, Instruction instr, CodeFrame frame) {

src/java/me/topchetoeu/jscript/core/engine/scope/GlobalScope.java

@@ -1,19 +1,20 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.HashSet;
 import java.util.Set;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.FunctionValue;
-import me.topchetoeu.jscript.engine.values.NativeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.exceptions.EngineException;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.NativeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
 
 public class GlobalScope implements ScopeRecord {
     public final ObjectValue obj;
 
     public boolean has(Context ctx, String name) {
-        return obj.hasMember(ctx, name, false);
+        return Values.hasMember(null, obj, name, false);
     }
     public Object getKey(String name) {
         return name;
@@ -21,7 +22,7 @@ public class GlobalScope implements ScopeRecord {
 
     public GlobalScope globalChild() {
         var obj = new ObjectValue();
-        obj.setPrototype(null, this.obj);
+        Values.setPrototype(null, obj, this.obj);
         return new GlobalScope(obj);
     }
     public LocalScopeRecord child() {
@@ -29,14 +30,14 @@ public class GlobalScope implements ScopeRecord {
     }
 
     public Object define(String name) {
-        if (obj.hasMember(null, name, true)) return name;
-        obj.defineProperty(null, name, null);
+        if (Values.hasMember(Context.NULL, obj, name, false)) return name;
+        obj.defineProperty(Context.NULL, name, null);
         return name;
     }
     public void define(String name, Variable val) {
-        obj.defineProperty(null, name,
-            new NativeFunction("get " + name, (ctx, th, a) -> val.get(ctx)),
-            new NativeFunction("set " + name, (ctx, th, args) -> { val.set(ctx, args.length > 0 ? args[0] : null); return null; }),
+        obj.defineProperty(Context.NULL, name,
+            new NativeFunction("get " + name, args -> val.get(args.ctx)),
+            new NativeFunction("set " + name, args -> { val.set(args.ctx, args.get(0)); return null; }),
             true, true
         );
     }
@@ -51,12 +52,12 @@ public class GlobalScope implements ScopeRecord {
     }
 
     public Object get(Context ctx, String name) {
-        if (!obj.hasMember(ctx, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
-        else return obj.getMember(ctx, name);
+        if (!Values.hasMember(ctx, obj, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
+        else return Values.getMember(ctx, obj, name);
     }
     public void set(Context ctx, String name, Object val) {
-        if (!obj.hasMember(ctx, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
-        if (!obj.setMember(ctx, name, val, false)) throw EngineException.ofSyntax("The global '" + name + "' is readonly.");
+        if (!Values.hasMember(ctx, obj, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
+        if (!Values.setMember(ctx, obj, name, val)) throw EngineException.ofSyntax("The global '" + name + "' is readonly.");
     }
 
     public Set<String> keys() {

src/java/me/topchetoeu/jscript/core/engine/scope/LocalScope.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.ArrayList;
 

src/java/me/topchetoeu/jscript/core/engine/scope/LocalScopeRecord.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.ArrayList;
 

src/java/me/topchetoeu/jscript/core/engine/scope/ScopeRecord.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 public interface ScopeRecord {
     public Object getKey(String name);

src/java/me/topchetoeu/jscript/core/engine/scope/ValueVariable.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class ValueVariable implements Variable {
     public boolean readonly;

src/java/me/topchetoeu/jscript/core/engine/scope/Variable.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public interface Variable {
     Object get(Context ctx);

src/java/me/topchetoeu/jscript/core/engine/values/ArrayValue.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.Arrays;
 import java.util.Collection;
@@ -6,7 +6,7 @@ import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 // TODO: Make methods generic
 public class ArrayValue extends ObjectValue implements Iterable<Object> {
@@ -84,6 +84,8 @@ public class ArrayValue extends ObjectValue implements Iterable<Object> {
     }
     public void copyTo(Context ctx, ArrayValue arr, int sourceStart, int destStart, int count) {
         // Iterate in reverse to reallocate at most once
+        if (destStart + count > arr.size) arr.size = destStart + count;
+
         for (var i = count - 1; i >= 0; i--) {
             if (i + sourceStart < 0 || i + sourceStart >= size) arr.remove(i + destStart);
             if (values[i + sourceStart] == UNDEFINED) arr.set(ctx, i + destStart, null);

src/java/me/topchetoeu/jscript/core/engine/values/CodeFunction.java

@@ -1,13 +1,12 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.FunctionBody;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.frame.CodeFrame;
-import me.topchetoeu.jscript.engine.frame.Runners;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
 
 public class CodeFunction extends FunctionValue {
     public final int localsN;
@@ -32,16 +31,17 @@ public class CodeFunction extends FunctionValue {
     @Override
     public Object call(Context ctx, Object thisArg, Object ...args) {
         var frame = new CodeFrame(ctx, thisArg, args, this);
-        try {
-            ctx.pushFrame(frame);
 
+        frame.onPush();
+
+        try {
             while (true) {
-                var res = frame.next(ctx, Runners.NO_RETURN, Runners.NO_RETURN, null);
-                if (res != Runners.NO_RETURN) return res;
+                var res = frame.next(Values.NO_RETURN, Values.NO_RETURN, null);
+                if (res != Values.NO_RETURN) return res;
             }
         }
         finally {
-            ctx.popFrame(frame);
+            frame.onPop();
         }
     }
 

src/java/me/topchetoeu/jscript/core/engine/values/FunctionValue.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public abstract class FunctionValue extends ObjectValue {
     public String name = "";

src/java/me/topchetoeu/jscript/core/engine/values/NativeFunction.java

@@ -1,17 +1,18 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.utils.interop.Arguments;
 
 public class NativeFunction extends FunctionValue {
     public static interface NativeFunctionRunner {
-        Object run(Context ctx, Object thisArg, Object[] args);
+        Object run(Arguments args);
     }
 
     public final NativeFunctionRunner action;
 
     @Override
     public Object call(Context ctx, Object thisArg, Object ...args) {
-        return action.run(ctx, thisArg, args);
+        return action.run(new Arguments(ctx, thisArg, args));
     }
 
     public NativeFunction(String name, NativeFunctionRunner action) {

src/java/me/topchetoeu/jscript/core/engine/values/NativeWrapper.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public class NativeWrapper extends ObjectValue {
     private static final Object NATIVE_PROTO = new Object();
@@ -8,7 +8,7 @@ public class NativeWrapper extends ObjectValue {
 
     @Override
     public ObjectValue getPrototype(Context ctx) {
-        if (prototype == NATIVE_PROTO) return ctx.environment().wrappers.getProto(wrapped.getClass());
+        if (prototype == NATIVE_PROTO) return ctx.environment.wrappers.getProto(wrapped.getClass());
         else return super.getPrototype(ctx);
     }
 

src/java/me/topchetoeu/jscript/core/engine/values/ObjectValue.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
@@ -6,7 +6,8 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
 
 public class ObjectValue {
     public static enum PlaceholderProto {
@@ -53,6 +54,13 @@ public class ObjectValue {
     public LinkedHashSet<Object> nonConfigurableSet = new LinkedHashSet<>();
     public LinkedHashSet<Object> nonEnumerableSet = new LinkedHashSet<>();
 
+    private Property getProperty(Context ctx, Object key) {
+        if (properties.containsKey(key)) return properties.get(key);
+        var proto = getPrototype(ctx);
+        if (proto != null) return proto.getProperty(ctx, key);
+        else return null;
+    }
+
     public final boolean memberWritable(Object key) {
         if (state == State.FROZEN) return false;
         return !values.containsKey(key) || !nonWritableSet.contains(key);
@@ -146,45 +154,18 @@ public class ObjectValue {
 
     public ObjectValue getPrototype(Context ctx) {
         try {
-            if (prototype == OBJ_PROTO) return ctx.environment().proto("object");
-            if (prototype == ARR_PROTO) return ctx.environment().proto("array");
-            if (prototype == FUNC_PROTO) return ctx.environment().proto("function");
-            if (prototype == ERR_PROTO) return ctx.environment().proto("error");
-            if (prototype == RANGE_ERR_PROTO) return ctx.environment().proto("rangeErr");
-            if (prototype == SYNTAX_ERR_PROTO) return ctx.environment().proto("syntaxErr");
-            if (prototype == TYPE_ERR_PROTO) return ctx.environment().proto("typeErr");
+            if (prototype == OBJ_PROTO) return ctx.get(Environment.OBJECT_PROTO);
+            if (prototype == ARR_PROTO) return ctx.get(Environment.ARRAY_PROTO);
+            if (prototype == FUNC_PROTO) return ctx.get(Environment.FUNCTION_PROTO);
+            if (prototype == ERR_PROTO) return ctx.get(Environment.ERROR_PROTO);
+            if (prototype == RANGE_ERR_PROTO) return ctx.get(Environment.RANGE_ERR_PROTO);
+            if (prototype == SYNTAX_ERR_PROTO) return ctx.get(Environment.SYNTAX_ERR_PROTO);
+            if (prototype == TYPE_ERR_PROTO) return ctx.get(Environment.TYPE_ERR_PROTO);
         }
         catch (NullPointerException e) { return null; }
 
         return (ObjectValue)prototype;
     }
-    public final boolean setPrototype(Context ctx, Object val) {
-        val = Values.normalize(ctx, val);
-
-        if (!extensible()) return false;
-        if (val == null || val == Values.NULL) {
-            prototype = null;
-            return true;
-        }
-        else if (Values.isObject(val)) {
-            var obj = Values.object(val);
-
-            if (ctx != null && ctx.environment() != null) {
-                if (obj == ctx.environment().proto("object")) prototype = OBJ_PROTO;
-                else if (obj == ctx.environment().proto("array")) prototype = ARR_PROTO;
-                else if (obj == ctx.environment().proto("function")) prototype = FUNC_PROTO;
-                else if (obj == ctx.environment().proto("error")) prototype = ERR_PROTO;
-                else if (obj == ctx.environment().proto("syntaxErr")) prototype = SYNTAX_ERR_PROTO;
-                else if (obj == ctx.environment().proto("typeErr")) prototype = TYPE_ERR_PROTO;
-                else if (obj == ctx.environment().proto("rangeErr")) prototype = RANGE_ERR_PROTO;
-                else prototype = obj;
-            }
-            else prototype = obj;
-
-            return true;
-        }
-        return false;
-    }
     public final boolean setPrototype(PlaceholderProto val) {
         if (!extensible()) return false;
         switch (val) {
@@ -200,18 +181,21 @@ public class ObjectValue {
         return true;
     }
 
-    protected Property getProperty(Context ctx, Object key) {
-        if (properties.containsKey(key)) return properties.get(key);
-        var proto = getPrototype(ctx);
-        if (proto != null) return proto.getProperty(ctx, key);
-        else return null;
-    }
+    /**
+     * A method, used to get the value of a field. If a property is bound to
+     * this key, but not a field, this method should return null.
+     */
     protected Object getField(Context ctx, Object key) {
         if (values.containsKey(key)) return values.get(key);
         var proto = getPrototype(ctx);
         if (proto != null) return proto.getField(ctx, key);
         else return null;
     }
+    /**
+     * Changes the value of a field, that is bound to the given key. If no field is
+     * bound to this key, a new field should be created with the given value
+     * @return Whether or not the operation was successful
+     */
     protected boolean setField(Context ctx, Object key, Object val) {
         if (val instanceof FunctionValue && ((FunctionValue)val).name.equals("")) {
             ((FunctionValue)val).name = Values.toString(ctx, key);
@@ -220,9 +204,16 @@ public class ObjectValue {
         values.put(key, val);
         return true;
     }
+    /**
+     * Deletes the field bound to the given key.
+     */
     protected void deleteField(Context ctx, Object key) {
         values.remove(key);
     }
+    /**
+     * Returns whether or not there is a field bound to the given key.
+     * This must ignore properties
+     */
     protected boolean hasField(Context ctx, Object key) {
         return values.containsKey(key);
     }
@@ -243,10 +234,6 @@ public class ObjectValue {
         }
         else return getField(ctx, key);
     }
-    public final Object getMember(Context ctx, Object key) {
-        return getMember(ctx, key, this);
-    }
-
     public final boolean setMember(Context ctx, Object key, Object val, Object thisArg, boolean onlyProps) {
         key = Values.normalize(ctx, key); val = Values.normalize(ctx, val);
 
@@ -266,10 +253,6 @@ public class ObjectValue {
         else if (nonWritableSet.contains(key)) return false;
         else return setField(ctx, key, val);
     }
-    public final boolean setMember(Context ctx, Object key, Object val, boolean onlyProps) {
-        return setMember(ctx, Values.normalize(ctx, key), Values.normalize(ctx, val), this, onlyProps);
-    }
-
     public final boolean hasMember(Context ctx, Object key, boolean own) {
         key = Values.normalize(ctx, key);
 
@@ -290,6 +273,33 @@ public class ObjectValue {
         deleteField(ctx, key);
         return true;
     }
+    public final boolean setPrototype(Context ctx, Object val) {
+        val = Values.normalize(ctx, val);
+
+        if (!extensible()) return false;
+        if (val == null || val == Values.NULL) {
+            prototype = null;
+            return true;
+        }
+        else if (val instanceof ObjectValue) {
+            var obj = Values.object(val);
+
+            if (ctx != null) {
+                if (obj == ctx.get(Environment.OBJECT_PROTO)) prototype = OBJ_PROTO;
+                else if (obj == ctx.get(Environment.ARRAY_PROTO)) prototype = ARR_PROTO;
+                else if (obj == ctx.get(Environment.FUNCTION_PROTO)) prototype = FUNC_PROTO;
+                else if (obj == ctx.get(Environment.ERROR_PROTO)) prototype = ERR_PROTO;
+                else if (obj == ctx.get(Environment.SYNTAX_ERR_PROTO)) prototype = SYNTAX_ERR_PROTO;
+                else if (obj == ctx.get(Environment.TYPE_ERR_PROTO)) prototype = TYPE_ERR_PROTO;
+                else if (obj == ctx.get(Environment.RANGE_ERR_PROTO)) prototype = RANGE_ERR_PROTO;
+                else prototype = obj;
+            }
+            else prototype = obj;
+
+            return true;
+        }
+        return false;
+    }
 
     public final ObjectValue getMemberDescriptor(Context ctx, Object key) {
         key = Values.normalize(ctx, key);

src/java/me/topchetoeu/jscript/core/engine/values/ScopeValue.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.HashMap;
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
 
 public class ScopeValue extends ObjectValue {
     public final ValueVariable[] variables;
@@ -23,7 +23,7 @@ public class ScopeValue extends ObjectValue {
         }
 
         var proto = getPrototype(ctx);
-        if (proto != null && proto.hasField(ctx, key) && proto.setField(ctx, key, val)) return true;
+        if (proto != null && proto.hasMember(ctx, key, false) && proto.setField(ctx, key, val)) return true;
 
         return super.setField(ctx, key, val);
     }

src/java/me/topchetoeu/jscript/core/engine/values/Symbol.java

@@ -0,0 +1,28 @@
+package me.topchetoeu.jscript.core.engine.values;
+
+import java.util.HashMap;
+
+public final class Symbol {
+    private static final HashMap<String, Symbol> registry = new HashMap<>();
+
+    public final String value;
+
+    public Symbol(String value) {
+        this.value = value;
+    }
+
+    @Override
+    public String toString() {
+        if (value == null) return "Symbol";
+        else return "@@" + value;
+    }
+
+    public static Symbol get(String name) {
+        if (registry.containsKey(name)) return registry.get(name);
+        else {
+            var res = new Symbol(name);
+            registry.put(name, res);
+            return res;
+        }
+    }
+}

src/java/me/topchetoeu/jscript/core/engine/values/Values.java

@@ -1,5 +1,7 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
 import java.lang.reflect.Array;
 import java.math.BigDecimal;
 import java.util.ArrayList;
@@ -10,13 +12,13 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.frame.ConvertHint;
-import me.topchetoeu.jscript.exceptions.ConvertException;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.exceptions.UncheckedException;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.frame.ConvertHint;
+import me.topchetoeu.jscript.core.exceptions.ConvertException;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 import me.topchetoeu.jscript.lib.PromiseLib;
 
 public class Values {
@@ -39,10 +41,8 @@ public class Values {
     }
 
     public static final Object NULL = new Object();
+    public static final Object NO_RETURN = new Object();
 
-    public static boolean isObject(Object val) { return val instanceof ObjectValue; }
-    public static boolean isFunction(Object val) { return val instanceof FunctionValue; }
-    public static boolean isArray(Object val) { return val instanceof ArrayValue; }
     public static boolean isWrapper(Object val) { return val instanceof NativeWrapper; }
     public static boolean isWrapper(Object val, Class<?> clazz) {
         if (!isWrapper(val)) return false;
@@ -89,8 +89,8 @@ public class Values {
     private static Object tryCallConvertFunc(Context ctx, Object obj, String name) {
         var func = getMember(ctx, obj, name);
 
-        if (func != null) {
-            var res = ((FunctionValue)func).call(ctx, obj);
+        if (func instanceof FunctionValue) {
+            var res = Values.call(ctx, func, obj);
             if (isPrimitive(res)) return res;
         }
 
@@ -136,7 +136,6 @@ public class Values {
         if (val instanceof String) {
             try { return Double.parseDouble((String)val); }
             catch (NumberFormatException e) { return Double.NaN; }
-            catch (Throwable e) { throw new UncheckedException(e); }
         }
         return Double.NaN;
     }
@@ -284,7 +283,7 @@ public class Values {
         obj = normalize(ctx, obj); key = normalize(ctx, key);
         if (obj == null) throw new IllegalArgumentException("Tried to access member of undefined.");
         if (obj == NULL) throw new IllegalArgumentException("Tried to access member of null.");
-        if (isObject(obj)) return object(obj).getMember(ctx, key);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).getMember(ctx, key, obj);
 
         if (obj instanceof String && key instanceof Number) {
             var i = number(key);
@@ -310,7 +309,7 @@ public class Values {
         if (obj == null) throw EngineException.ofType("Tried to access member of undefined.");
         if (obj == NULL) throw EngineException.ofType("Tried to access member of null.");
         if (key != null && "__proto__".equals(key)) return setPrototype(ctx, obj, val);
-        if (isObject(obj)) return object(obj).setMember(ctx, key, val, false);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).setMember(ctx, key, val, obj, false);
 
         var proto = getPrototype(ctx, obj);
         return proto.setMember(ctx, key, val, obj, true);
@@ -320,7 +319,7 @@ public class Values {
         obj = normalize(ctx, obj); key = normalize(ctx, key);
 
         if ("__proto__".equals(key)) return true;
-        if (isObject(obj)) return object(obj).hasMember(ctx, key, own);
+        if (obj instanceof ObjectValue) return object(obj).hasMember(ctx, key, own);
 
         if (obj instanceof String && key instanceof Number) {
             var i = number(key);
@@ -337,30 +336,35 @@ public class Values {
         if (obj == null || obj == NULL) return false;
         obj = normalize(ctx, obj); key = normalize(ctx, key);
 
-        if (isObject(obj)) return object(obj).deleteMember(ctx, key);
+        if (obj instanceof ObjectValue) return object(obj).deleteMember(ctx, key);
         else return false;
     }
     public static ObjectValue getPrototype(Context ctx, Object obj) {
         if (obj == null || obj == NULL) return null;
         obj = normalize(ctx, obj);
-        if (isObject(obj)) return object(obj).getPrototype(ctx);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).getPrototype(ctx);
         if (ctx == null) return null;
 
-        if (obj instanceof String) return ctx.environment().proto("string");
-        else if (obj instanceof Number) return ctx.environment().proto("number");
-        else if (obj instanceof Boolean) return ctx.environment().proto("bool");
-        else if (obj instanceof Symbol) return ctx.environment().proto("symbol");
+        if (obj instanceof String) return ctx.get(Environment.STRING_PROTO);
+        else if (obj instanceof Number) return ctx.get(Environment.NUMBER_PROTO);
+        else if (obj instanceof Boolean) return ctx.get(Environment.BOOL_PROTO);
+        else if (obj instanceof Symbol) return ctx.get(Environment.SYMBOL_PROTO);
 
         return null;
     }
     public static boolean setPrototype(Context ctx, Object obj, Object proto) {
         obj = normalize(ctx, obj);
-        return isObject(obj) && object(obj).setPrototype(ctx, proto);
+        return obj instanceof ObjectValue && ((ObjectValue)obj).setPrototype(ctx, proto);
+    }
+    public static void makePrototypeChain(Context ctx, Object... chain) {
+        for(var i = 1; i < chain.length; i++) {
+            setPrototype(ctx, chain[i], chain[i - 1]);
+        }
     }
     public static List<Object> getMembers(Context ctx, Object obj, boolean own, boolean includeNonEnumerable) {  
         List<Object> res = new ArrayList<>();
 
-        if (isObject(obj)) res = object(obj).keys(includeNonEnumerable);
+        if (obj instanceof ObjectValue) res = object(obj).keys(includeNonEnumerable);
         if (obj instanceof String) {
             for (var i = 0; i < ((String)obj).length(); i++) res.add((double)i);
         }
@@ -370,7 +374,7 @@ public class Values {
 
             while (proto != null) {
                 res.addAll(proto.keys(includeNonEnumerable));
-                proto = proto.getPrototype(ctx);
+                proto = getPrototype(ctx, proto);
             }
         }
 
@@ -396,17 +400,17 @@ public class Values {
     }
 
     public static Object call(Context ctx, Object func, Object thisArg, Object ...args) {
-        if (!isFunction(func)) throw EngineException.ofType("Tried to call a non-function value.");
+        if (!(func instanceof FunctionValue)) throw EngineException.ofType("Tried to call a non-function value.");
         return function(func).call(ctx, thisArg, args);
     }
     public static Object callNew(Context ctx, Object func, Object ...args) {
         var res = new ObjectValue();
         try {
             var proto = Values.getMember(ctx, func, "prototype");
-            res.setPrototype(ctx, proto);
-    
+            setPrototype(ctx, res, proto);
+
             var ret = call(ctx, func, res, args);
-    
+
             if (ret != null && func instanceof FunctionValue && ((FunctionValue)func).special) return ret;
             return res;
         }
@@ -476,7 +480,7 @@ public class Values {
 
         if (val instanceof Class) {
             if (ctx == null) return null;
-            else return ctx.environment().wrappers.getConstr((Class<?>)val);
+            else return ctx.environment.wrappers.getConstr((Class<?>)val);
         }
 
         return new NativeWrapper(val);
@@ -543,6 +547,9 @@ public class Values {
 
         if (obj == null) return null;
         if (clazz.isInstance(obj)) return (T)obj;
+        if (clazz.isAssignableFrom(NativeWrapper.class)) {
+            return (T)new NativeWrapper(obj);
+        }
 
         throw new ConvertException(type(obj), clazz.getSimpleName());
     }
@@ -550,16 +557,16 @@ public class Values {
     public static Iterable<Object> fromJSIterator(Context ctx, Object obj) {
         return () -> {
             try {
-                var symbol = ctx.environment().symbol("Symbol.iterator");
+                var symbol = Symbol.get("Symbol.iterator");
 
                 var iteratorFunc = getMember(ctx, obj, symbol);
-                if (!isFunction(iteratorFunc)) return Collections.emptyIterator();
+                if (!(iteratorFunc instanceof FunctionValue)) return Collections.emptyIterator();
                 var iterator = iteratorFunc instanceof FunctionValue ?
                     ((FunctionValue)iteratorFunc).call(ctx, obj, obj) :
                     iteratorFunc;
                 var nextFunc = getMember(ctx, call(ctx, iteratorFunc, obj), "next");
 
-                if (!isFunction(nextFunc)) return Collections.emptyIterator();
+                if (!(nextFunc instanceof FunctionValue)) return Collections.emptyIterator();
 
                 return new Iterator<Object>() {
                     private Object value = null;
@@ -569,11 +576,11 @@ public class Values {
                     private void loadNext() {
                         if (next == null) value = null;
                         else if (consumed) {
-                            var curr = object(next.call(ctx, iterator));
+                            var curr = next.call(ctx, iterator);
                             if (curr == null) { next = null; value = null; }
-                            if (toBoolean(curr.getMember(ctx, "done"))) { next = null; value = null; }
+                            if (toBoolean(Values.getMember(ctx, curr, "done"))) { next = null; value = null; }
                             else {
-                                this.value = curr.getMember(ctx, "value");
+                                this.value = Values.getMember(ctx, curr, "value");
                                 consumed = false;
                             }
                         }
@@ -604,16 +611,16 @@ public class Values {
         var res = new ObjectValue();
 
         try {
-            var key = getMember(ctx, getMember(ctx, ctx.environment().proto("symbol"), "constructor"), "iterator");
-            res.defineProperty(ctx, key, new NativeFunction("", (_ctx, thisArg, args) -> thisArg));
+            var key = getMember(ctx, getMember(ctx, ctx.get(Environment.SYMBOL_PROTO), "constructor"), "iterator");
+            res.defineProperty(ctx, key, new NativeFunction("", args -> args.self));
         }
         catch (IllegalArgumentException | NullPointerException e) { }
 
-        res.defineProperty(ctx, "next", new NativeFunction("", (_ctx, _th, _args) -> {
+        res.defineProperty(ctx, "next", new NativeFunction("", args -> {
             if (!it.hasNext()) return new ObjectValue(ctx, Map.of("done", true));
             else {
                 var obj = new ObjectValue();
-                obj.defineProperty(_ctx, "value", it.next());
+                obj.defineProperty(args.ctx, "value", it.next());
                 return obj;
             }
         }));
@@ -629,17 +636,17 @@ public class Values {
         var res = new ObjectValue();
 
         try {
-            var key = getMemberPath(ctx, ctx.environment().proto("symbol"), "constructor", "asyncIterator");
-            res.defineProperty(ctx, key, new NativeFunction("", (_ctx, thisArg, args) -> thisArg));
+            var key = getMemberPath(ctx, ctx.get(Environment.SYMBOL_PROTO), "constructor", "asyncIterator");
+            res.defineProperty(ctx, key, new NativeFunction("", args -> args.self));
         }
         catch (IllegalArgumentException | NullPointerException e) { }
 
-        res.defineProperty(ctx, "next", new NativeFunction("", (_ctx, _th, _args) -> {
-            return PromiseLib.await(ctx, () -> {
+        res.defineProperty(ctx, "next", new NativeFunction("", args -> {
+            return PromiseLib.await(args.ctx, () -> {
                 if (!it.hasNext()) return new ObjectValue(ctx, Map.of("done", true));
                 else {
                     var obj = new ObjectValue();
-                    obj.defineProperty(_ctx, "value", it.next());
+                    obj.defineProperty(args.ctx, "value", it.next());
                     return obj;
                 }
             });
@@ -658,104 +665,107 @@ public class Values {
         if (protoObj.values.size() + protoObj.properties.size() != 1) return false;
         return true;
     }
-    private static void printValue(Context ctx, Object val, HashSet<Object> passed, int tab) {
-        if (tab == 0 && val instanceof String) {
-            System.out.print(val);
-            return;
-        }
+    private static String toReadable(Context ctx, Object val, HashSet<Object> passed, int tab) {
+        if (tab == 0 && val instanceof String) return (String)val;
 
-        if (passed.contains(val)) {
-            System.out.print("[circular]");
-            return;
-        }
+        if (passed.contains(val)) return "[circular]";
 
         var printed = true;
+        var res = new StringBuilder();
 
         if (val instanceof FunctionValue) {
-            System.out.print(val.toString());
+            res.append(val.toString());
             var loc = val instanceof CodeFunction ? ((CodeFunction)val).loc() : null;
 
-            if (loc != null) System.out.print(" @ " + loc);
+            if (loc != null) res.append(" @ " + loc);
         }
         else if (val instanceof ArrayValue) {
-            System.out.print("[");
+            res.append("[");
             var obj = ((ArrayValue)val);
             for (int i = 0; i < obj.size(); i++) {
-                if (i != 0) System.out.print(", ");
-                else System.out.print(" ");
-                if (obj.has(i)) printValue(ctx, obj.get(i), passed, tab);
-                else System.out.print("<empty>");
+                if (i != 0) res.append(", ");
+                else res.append(" ");
+                if (obj.has(i)) res.append(toReadable(ctx, obj.get(i), passed, tab));
+                else res.append("<empty>");
             }
-            System.out.print(" ] ");
+            res.append(" ] ");
         }
         else if (val instanceof NativeWrapper) {
             var obj = ((NativeWrapper)val).wrapped;
-            System.out.print("Native " + obj.toString() + " ");
+            res.append("Native " + obj.toString() + " ");
         }
         else printed = false;
 
         if (val instanceof ObjectValue) {
             if (tab > 3) {
-                System.out.print("{...}");
-                return;
+                return "{...}";
             }
+
             passed.add(val);
 
             var obj = (ObjectValue)val;
             if (obj.values.size() + obj.properties.size() == 0 || isEmptyFunc(obj)) {
-                if (!printed) System.out.println("{}");
+                if (!printed) res.append("{}\n");
             }
             else {
-                System.out.println("{");
+                res.append("{\n");
 
                 for (var el : obj.values.entrySet()) {
                     for (int i = 0; i < tab + 1; i++) System.out.print("    ");
-                    printValue(ctx, el.getKey(), passed, tab + 1);
-                    System.out.print(": ");
-                    printValue(ctx, el.getValue(), passed, tab + 1);
-                    System.out.println(",");
+                    res.append(toReadable(ctx, el.getKey(), passed, tab + 1));
+                    res.append(": ");
+                    res.append(toReadable(ctx, el.getValue(), passed, tab + 1));
+                    res.append(",\n");
                 }
                 for (var el : obj.properties.entrySet()) {
                     for (int i = 0; i < tab + 1; i++) System.out.print("    ");
-                    printValue(ctx, el.getKey(), passed, tab + 1);
-                    System.out.println(": [prop],");
+                    res.append(toReadable(ctx, el.getKey(), passed, tab + 1));
+                    res.append(": [prop],\n");
                 }
 
-                for (int i = 0; i < tab; i++) System.out.print("    ");
-                System.out.print("}");
-
+                for (int i = 0; i < tab; i++) res.append("    ");
+                res.append("}");
             }
 
             passed.remove(val);
         }
-        else if (val == null) System.out.print("undefined");
-        else if (val == Values.NULL) System.out.print("null");
-        else if (val instanceof String) System.out.print("'" + val + "'");
-        else System.out.print(Values.toString(ctx, val));
+        else if (val == null) return "undefined";
+        else if (val == Values.NULL) return "null";
+        else if (val instanceof String) return "'" + val + "'";
+        else return Values.toString(ctx, val);
+
+        return res.toString();
+    }
+
+    public static String toReadable(Context ctx, Object val) {
+        return toReadable(ctx, val, new HashSet<>(), 0);
+    }
+    public static String errorToReadable(RuntimeException err, String prefix) {
+        prefix = prefix == null ? "Uncaught" : "Uncaught " + prefix;
+        if (err instanceof EngineException) {
+            var ee = ((EngineException)err);
+            try {
+                return prefix + " " + ee.toString(new Context(ee.engine, ee.env));
+            }
+            catch (EngineException ex) {
+                return prefix + " " + toReadable(new Context(ee.engine, ee.env), ee.value);
+            }
+        }
+        else if (err instanceof SyntaxException) {
+            return prefix + " SyntaxError " + ((SyntaxException)err).msg;
+        }
+        else if (err.getCause() instanceof InterruptedException) return "";
+        else {
+            var str = new ByteArrayOutputStream();
+            err.printStackTrace(new PrintStream(str));
+
+            return prefix + " internal error " + str.toString();
+        }
     }
     public static void printValue(Context ctx, Object val) {
-        printValue(ctx, val, new HashSet<>(), 0);
+        System.out.print(toReadable(ctx, val));
     }
     public static void printError(RuntimeException err, String prefix) {
-        prefix = prefix == null ? "Uncaught" : "Uncaught " + prefix;
-        try {
-            if (err instanceof EngineException) {
-                var ee = ((EngineException)err);
-                System.out.println(prefix + " " + ee.toString(new Context(ee.engine, ee.env)));
-            }
-            else if (err instanceof SyntaxException) {
-                System.out.println("Syntax error:" + ((SyntaxException)err).msg);
-            }
-            else if (err.getCause() instanceof InterruptedException) return;
-            else {
-                System.out.println("Internal error ocurred:");
-                err.printStackTrace();
-            }
-        }
-        catch (EngineException ex) {
-            System.out.println("Uncaught ");
-            Values.printValue(null, ((EngineException)err).value);
-            System.out.println();
-        }
+        System.out.println(errorToReadable(err, prefix));
     }
 }

src/java/me/topchetoeu/jscript/core/exceptions/ConvertException.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 public class ConvertException extends RuntimeException {
     public final String source, target;

src/java/me/topchetoeu/jscript/core/exceptions/EngineException.java

@@ -1,15 +1,16 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Engine;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.engine.values.ObjectValue.PlaceholderProto;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Engine;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue.PlaceholderProto;
 
 public class EngineException extends RuntimeException {
     public static class StackElement {
@@ -18,13 +19,13 @@ public class EngineException extends RuntimeException {
         public final Context ctx;
 
         public boolean visible() {
-            return ctx == null || ctx.environment() == null || ctx.environment().stackVisible;
+            return ctx == null || !ctx.get(Environment.HIDE_STACK, false);
         }
         public String toString() {
             var res = "";
             var loc = location;
 
-            if (loc != null && ctx != null && ctx.engine != null) loc = ctx.engine.mapToCompiled(loc);
+            if (loc != null && ctx != null && ctx.engine != null) loc = DebugContext.get(ctx).mapToCompiled(loc);
 
             if (loc != null) res += "at " + loc.toString() + " ";
             if (function != null && !function.equals("")) res += "in " + function + " ";
@@ -37,7 +38,7 @@ public class EngineException extends RuntimeException {
             if (function.equals("")) function = null;
 
             if (ctx == null) this.ctx = null;
-            else this.ctx = new Context(ctx.engine, ctx.environment());
+            else this.ctx = new Context(ctx.engine, ctx.environment);
             this.location = location;
             this.function = function;
         }
@@ -52,7 +53,7 @@ public class EngineException extends RuntimeException {
     public EngineException add(Context ctx, String name, Location location) {
         var el = new StackElement(ctx, location, name);
         if (el.function == null && el.location == null) return this;
-        setCtx(ctx.environment(), ctx.engine);
+        setCtx(ctx.environment, ctx.engine);
         stackTrace.add(el);
         return this;
     }
@@ -65,6 +66,11 @@ public class EngineException extends RuntimeException {
         if (this.engine == null) this.engine = engine;
         return this;
     }
+    public EngineException setCtx(Context ctx) {
+        if (this.env == null) this.env = ctx.environment;
+        if (this.engine == null) this.engine = ctx.engine;
+        return this;
+    }
 
     public String toString(Context ctx) {
         var ss = new StringBuilder();

src/java/me/topchetoeu/jscript/core/exceptions/InterruptException.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 public class InterruptException extends RuntimeException {
     public InterruptException() { }

src/java/me/topchetoeu/jscript/core/exceptions/SyntaxException.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
-import me.topchetoeu.jscript.Location;
+import me.topchetoeu.jscript.common.Location;
 
 public class SyntaxException extends RuntimeException {
     public final Location loc;

src/java/me/topchetoeu/jscript/core/parsing/Operator.java

@@ -1,9 +1,9 @@
-package me.topchetoeu.jscript.parsing;
+package me.topchetoeu.jscript.core.parsing;
 
 import java.util.HashMap;
 import java.util.Map;
 
-import me.topchetoeu.jscript.engine.Operation;
+import me.topchetoeu.jscript.core.engine.Operation;
 
 public enum Operator {
     MULTIPLY("*", Operation.MULTIPLY, 13),

src/java/me/topchetoeu/jscript/core/parsing/ParseRes.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.parsing;
+package me.topchetoeu.jscript.core.parsing;
 
 import java.util.List;
 import java.util.Map;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.parsing.Parsing.Parser;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.parsing.Parsing.Parser;
 
 public class ParseRes<T> {
     public static enum State {

src/java/me/topchetoeu/jscript/core/parsing/Parsing.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.parsing;
+package me.topchetoeu.jscript.core.parsing;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -8,19 +8,19 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.TreeSet;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.*;
-import me.topchetoeu.jscript.compilation.VariableDeclareStatement.Pair;
-import me.topchetoeu.jscript.compilation.control.*;
-import me.topchetoeu.jscript.compilation.control.SwitchStatement.SwitchCase;
-import me.topchetoeu.jscript.compilation.values.*;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.LocalScopeRecord;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.parsing.ParseRes.State;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.*;
+import me.topchetoeu.jscript.core.compilation.VariableDeclareStatement.Pair;
+import me.topchetoeu.jscript.core.compilation.control.*;
+import me.topchetoeu.jscript.core.compilation.control.SwitchStatement.SwitchCase;
+import me.topchetoeu.jscript.core.compilation.values.*;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.LocalScopeRecord;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
+import me.topchetoeu.jscript.core.parsing.ParseRes.State;
 
 // TODO: this has to be rewritten
 public class Parsing {
@@ -1178,8 +1178,7 @@ public class Parsing {
                 prevArg = true;
             }
             else if (argRes.isError()) return argRes.transform();
-            else if (isOperator(tokens, i + n, Operator.COMMA)) {
-                if (!prevArg) args.add(null);
+            else if (prevArg && isOperator(tokens, i + n, Operator.COMMA)) {
                 prevArg = false;
                 n++;
             }
@@ -1187,7 +1186,7 @@ public class Parsing {
                 n++;
                 break;
             }
-            else return ParseRes.failed();
+            else return ParseRes.error(getLoc(filename, tokens, i + n), prevArg ? "Expected a comma or a closing paren." : "Expected an expression or a closing paren.");
         }
 
         return ParseRes.res(new CallStatement(loc, false, prev, args.toArray(Statement[]::new)), n);

src/java/me/topchetoeu/jscript/core/parsing/RawToken.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.parsing;
+package me.topchetoeu.jscript.core.parsing;
 
 public class RawToken {
     public final String value;