├── .gitignore ├── .travis.yml ├── .jshintrc ├── bin └── evaljs ├── package.json ├── test.js ├── theTest.js ├── README.md ├── index.js └── dist └── eval.min.js /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: node_js 2 | node_js: 3 | - 6 4 | -------------------------------------------------------------------------------- /.jshintrc: -------------------------------------------------------------------------------- 1 | { 2 | "undef": true, 3 | "unused": "vars", 4 | "predef": ["-Promise"], 5 | "node": true, 6 | "strict": true, 7 | "indent": 2, 8 | "maxlen": 100 9 | } 10 | -------------------------------------------------------------------------------- /bin/evaljs: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | 3 | var repl = require('repl'); 4 | var evaljs = require('../'); 5 | var parse = require('acorn').parse; 6 | var fs = require('fs'); 7 | var env = new evaljs.Environment([global, {require: require}]); 8 | 9 | function run(iter){ 10 | var result = iter.next(); 11 | while(!result.done) { 12 | result = iter.next(); 13 | } 14 | return result.value; 15 | } 16 | 17 | repl.start({ 18 | eval: function (cmd, context, filename, callback) { 19 | try { 20 | callback(null, run(env.gen(cmd)())) 21 | } catch (err) { 22 | callback(err); 23 | }; 24 | } 25 | }); 26 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "evaljs", 3 | "version": "2.0.1", 4 | "description": "A JavaScript interpreter written in JavaScript", 5 | "main": "index.js", 6 | "bin": "./bin/evaljs", 7 | "dependencies": { 8 | "acorn": "^4.0.4", 9 | "require-from-string": "^1.2.1" 10 | }, 11 | "devDependencies": { 12 | "browserify": "^13.1.1", 13 | "esprima": "^3.1.2", 14 | "jshint": "^2.9.4", 15 | "regenerator": "^0.9.5", 16 | "uglify-js": "^2.7.5" 17 | }, 18 | "scripts": { 19 | "test": "npm run compile && npm run jshint && node test.js", 20 | "compile": "./node_modules/regenerator/bin/regenerator --include-runtime ./index.js > ./index-compiled.js", 21 | "jshint": "./node_modules/.bin/jshint index.js test.js theTest.js", 22 | "build": "mkdir -p dist && npm run build-js && npm run minify", 23 | "build-js": "./node_modules/.bin/browserify -r acorn -r ./index-compiled.js:evaljs -o dist/eval.js", 24 | "minify": "./node_modules/.bin/uglifyjs -mc -o dist/eval.min.js dist/eval.js" 25 | }, 26 | "keywords": [ 27 | "eval", 28 | "javascript", 29 | "interpreter", 30 | "closure", 31 | "closures", 32 | "js", 33 | "evaluate", 34 | "no-eval" 35 | ], 36 | "repository": { 37 | "type": "git", 38 | "url": "https://github.com/marten-de-vries/evaljs.git" 39 | }, 40 | "license": "ISC", 41 | "author": "Marten de Vries", 42 | "contributors": [ 43 | { 44 | "name": "Jason Huggins", 45 | "email": "jrhuggins@gmail.com", 46 | "url": "http://www.hugs.io/" 47 | } 48 | ] 49 | } 50 | -------------------------------------------------------------------------------- /test.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | var fs = require('fs'); 4 | var evaljs = require('./index'); 5 | var parse = require('acorn').parse; 6 | var requireFromString = require('require-from-string'); 7 | 8 | function run(iter){ 9 | var result = iter.next(); 10 | while(!result.done) { 11 | result = iter.next(); 12 | } 13 | return result.value; 14 | } 15 | 16 | // basic 17 | console.log(evaljs.evaluate('1 + 1')); 18 | 19 | // theTest.js 20 | var code = fs.readFileSync('theTest.js', {encoding: 'UTF-8'}); 21 | var parsedCode = parse(code, {'locations': true}); 22 | var env = new evaljs.Environment([{console: console}]); 23 | var iter1 = env.gen(parsedCode)(); 24 | run(iter1); 25 | 26 | // index.js 27 | var code = fs.readFileSync('index-compiled.js', {encoding: 'UTF-8'}); 28 | var script = "var evaljs = requireFromString(code);" + 29 | "console.log(evaljs.evaluate('30 + 4'));"; 30 | var envGlobal = { 31 | code: code, 32 | console: console 33 | }; 34 | envGlobal.global = global; 35 | var modLocal = { 36 | requireFromString: requireFromString, 37 | }; 38 | var env = new evaljs.Environment([envGlobal, modLocal]); 39 | var iter2 = env.gen(script)(); 40 | run(iter2); 41 | 42 | // acorn.js 43 | var code = fs.readFileSync(require.resolve('acorn'), {encoding: 'UTF-8'}); 44 | var envGlobal = { code: code }; 45 | var envModules = { requireFromString: requireFromString }; 46 | var env = new evaljs.Environment([envGlobal, envModules]); 47 | 48 | // load library 49 | var iter3 = env.gen("var acorn = requireFromString(code);")(); 50 | run(iter3); 51 | 52 | // parse file 53 | var iter4 = env.gen("acorn.parse('1 + 1');")(); 54 | var parsed = run(iter4); 55 | 56 | // for bonus points: run the parsed expression 57 | var iter5 = env.gen(parsed)(); 58 | console.log(run(iter5)); 59 | 60 | // using esprima 61 | var esprima = require('esprima'); 62 | console.log(evaljs.evaluate(esprima.parse('1 + 1'))); -------------------------------------------------------------------------------- /theTest.js: -------------------------------------------------------------------------------- 1 | // not strict, 'cause we need to parse the with statement 2 | /* jshint strict: false */ 3 | 4 | // statements after a return are ok for test cases 5 | /* jshint -W027 */ 6 | // missing break statements in switch statements are ok 7 | /* jshint -W086 */ 8 | 9 | var op = { 10 | '+': function (a, b) {return a + b; } 11 | }['+']; 12 | console.log(op(2, 2)); 13 | 14 | function Test(name) { 15 | this._name = name; 16 | } 17 | 18 | Test.prototype.hello = function () { 19 | console.log("Hello,", this._name + "!"); 20 | }; 21 | 22 | var a = new Test("Marten"); 23 | a.hello(); 24 | 25 | for (var i = 0; i < 4; i += 1) { 26 | console.log(i); 27 | } 28 | 29 | if (1) { 30 | console.log(2); 31 | } 32 | 33 | if (0) { 34 | console.warn(1); 35 | } else { 36 | console.error(3); 37 | } 38 | 39 | console.log("Hello World!"); 40 | 41 | (function (name) { 42 | console.log("Hello", name + "!"); 43 | }('Marten')); 44 | 45 | var i = 0; 46 | while (i < 2) { 47 | ++i; 48 | console.log(i); 49 | } 50 | 51 | // works if you use 'global' instead of the custom global object that 52 | // only includes 'console' 53 | // 54 | // process.nextTick(function () { 55 | // console.log("Later..."); 56 | // }); 57 | 58 | function test(def) { 59 | return function () { 60 | return def.abc; 61 | }; 62 | } 63 | 64 | console.log(test({abc: []})()); 65 | 66 | var a = (1, 2); 67 | console.log(a); 68 | 69 | var i = 0; 70 | do { 71 | console.log(i); 72 | i++; 73 | } while (i < 2); 74 | 75 | console.log(1 ? 0 : 1); 76 | console.log(0 ? 0 : 1); 77 | 78 | try { 79 | throw new Error('Hello World!'); 80 | } catch (err) { 81 | } finally { 82 | } 83 | 84 | for (var i = 0; i < 10; i++) { 85 | if (i === 1) { 86 | continue; 87 | } 88 | if (i === 3) { 89 | break; 90 | } 91 | console.log(i); 92 | } 93 | 94 | console.log(function () { 95 | var x = 4; 96 | console.log(1); 97 | if (x) { 98 | console.log(2); 99 | for (var i = 0; i < 3; i++) { 100 | console.log(3); 101 | return x; 102 | console.log(5); 103 | } 104 | console.log(6); 105 | } 106 | console.log(7); 107 | }()); 108 | 109 | var x = 2; 110 | switch (x) { 111 | case 1: 112 | console.log(1); 113 | //falls through 114 | case 2: 115 | console.log(2); 116 | case 3: 117 | console.log(3); 118 | break; 119 | case 4: 120 | console.log(4); 121 | default: 122 | console.log(5); 123 | } 124 | 125 | switch (x) { 126 | case 1: 127 | console.log(1); 128 | default: 129 | console.log(2); 130 | } 131 | 132 | switch (x) { 133 | case 2: 134 | console.log(3); 135 | break; 136 | default: 137 | console.log(4); 138 | } 139 | 140 | switch (x) { 141 | case 2: 142 | console.log(5); 143 | default: 144 | console.log(6); 145 | } 146 | 147 | switch (x) { 148 | default: 149 | console.log(7); 150 | case 2: 151 | console.log(8); 152 | } 153 | 154 | switch (x) { 155 | default: 156 | console.log(9); 157 | break; 158 | case 2: 159 | console.log(10); 160 | } 161 | 162 | var z; 163 | for (z in {a: 1, b: 2}) { 164 | console.log(z); 165 | } 166 | 167 | for (var key in {a: 1, b: 2}) { 168 | console.log(key); 169 | } 170 | 171 | abcdefg(); 172 | 173 | function abcdefg() { 174 | console.log('should be called'); 175 | } 176 | 177 | var obj = {}; 178 | obj.a = 3; 179 | console.log(obj.a); 180 | delete obj.a; 181 | console.log(obj.a); 182 | 183 | /*jshint ignore:start*/ 184 | with ({a: 1, b: 2}) { 185 | console.log(a, b); 186 | } 187 | /*jshint ignore:end*/ 188 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | eval.js 2 | ======= 3 | 4 | [![Build Status](https://travis-ci.org/marten-de-vries/evaljs.svg?branch=master)](https://travis-ci.org/marten-de-vries/evaljs) 5 | [![Dependency Status](https://david-dm.org/marten-de-vries/evaljs.svg)](https://david-dm.org/marten-de-vries/evaljs) 6 | [![devDependency Status](https://david-dm.org/marten-de-vries/evaljs/dev-status.svg)](https://david-dm.org/marten-de-vries/evaljs#info=devDependencies) 7 | 8 | A JavaScript interpreter written in JavaScript. 9 | 10 | Why? 11 | ---- 12 | 13 | You might be working in a JavaScript environment where ``eval()`` isn't 14 | allowed (and you have a genuinely good reason why you want to use it). 15 | Maybe this'll slip under the radar. You could also extend this to make 16 | it execute ES6 code in an ES5 environment. PRs welcome! 17 | 18 | How? 19 | ---- 20 | 21 | Most of the heavy lifting is done by [acorn][], a JavaScript parser 22 | written in JavaScript. **eval.js** converts the [AST] it generates into 23 | JavaScript function closures, which when run execute the whole program. 24 | 25 | It's also possible to use **eval.js** with [esprima][]. 26 | 27 | [acorn]: http://marijnhaverbeke.nl/acorn/ 28 | [AST]: https://en.wikipedia.org/wiki/Abstract_syntax_tree 29 | [esprima]: http://esprima.org/ 30 | 31 | Command line interface 32 | ---------------------- 33 | 34 | This npm package comes with a REPL which allows you to experiment with 35 | it. It's easy to install and use: 36 | 37 | ``` 38 | marten@procyon:~/git/evaljs$ npm install -g evaljs 39 | marten@procyon:~/git/evaljs$ evaljs 40 | > 1 + 1 41 | 2 42 | > new Error('Hello World!') 43 | [Error: Hello World!] 44 | > throw new Error('Hello World!') 45 | Error: Hello World! 46 | at newWithArgs (/home/marten/git/evaljs/index.js:255:10) 47 | at /home/marten/git/evaljs/index.js:249:12 48 | at Array.0 (/home/marten/git/evaljs/index.js:581:11) 49 | at /home/marten/git/evaljs/index.js:466:31 50 | at REPLServer.repl.start.eval (/home/marten/git/evaljs/bin/evaljs:12:34) 51 | at repl.js:249:20 52 | at REPLServer.repl.start.eval (/home/marten/git/evaljs/bin/evaljs:14:7) 53 | at Interface. (repl.js:239:12) 54 | at Interface.EventEmitter.emit (events.js:95:17) 55 | at Interface._onLine (readline.js:202:10) 56 | > marten@procyon:~/git/evaljs$ 57 | ``` 58 | 59 | API 60 | --- 61 | 62 | - ``evaljs.evaluate(code)`` 63 | A drop in alternative for ``window.eval()``. 64 | - ``new evaljs.Environment([scopesOrGlobalObject])`` 65 | Generates a new JS Environment to 'run' code in. The argument can be 66 | one of the following: 67 | - a global object 68 | - nothing (in this case, '{}' is used as the global object) 69 | - a list of objects. The first will be the global object, others will 70 | be other scopes loaded into the interpreter. Kind of like wrapping 71 | the code in a with statement for each further object in the array. 72 | This is handy for emulating Node.js (for passing in ``require()``, 73 | ``exports``, and ``module``.) 74 | 75 | A JS Environment has the following properties: 76 | - ``env.gen(node)``: Takes either the result of acorn's ``parse()`` 77 | method (an AST), or a JS string containing source code. This 78 | AST/code will be converted into a function that, when run, executes 79 | the AST/code passed in and returns the result. 80 | - ``env.DEBUG``: When set to ``true``, evaljs will write debug 81 | information to stdout. 82 | 83 | Size? 84 | ----- 85 | 86 | 16.3kB min+gzip 87 | 88 | License? 89 | -------- 90 | 91 | ISC 92 | 93 | Is it complete? 94 | --------------- 95 | 96 | No labeled statements; no nice error handling (although there is a 97 | ``DEBUG`` option). There are probably bugs. That said, it can run itself 98 | and acorn, so its supported subset of JS is usable. PRs containing 99 | improvements welcome! 100 | 101 | How slow is it? 102 | --------------- 103 | 104 | Not sure. I only tested with small snippets so far in Node.js, for 105 | which the speed difference isn't notable. But it's probably slow. 106 | 107 | Who? 108 | ---- 109 | 110 | **eval.js** is written by Marten de Vries. Maintained by Jason Huggins. 111 | Credits for the original idea go to [closure-interpreter][]. 112 | 113 | [closure-interpreter]: https://github.com/int3/closure-interpreter 114 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | /* jshint esversion: 6 */ 2 | /* jshint noyield: true */ 3 | 4 | "use strict"; 5 | 6 | //TODO: 7 | //- LabeledStatement -> including use in break/continue 8 | //- nicer error handling? 9 | //-> TESTS 10 | //-> BENCHMARKS 11 | 12 | var parse = require('acorn').parse; 13 | var util = require("util"); 14 | var EventEmitter = require("events").EventEmitter; 15 | 16 | function noop() {} 17 | 18 | function execute(func) { 19 | var result = func(); 20 | if ('' + result === 'null') { 21 | return result; 22 | } 23 | // FIXME: Convert to yield* 24 | if (result !== undefined) { 25 | if (result.next) { 26 | var iter = result; 27 | var res = iter.next(); 28 | while (!res.done) { 29 | res = iter.next(); 30 | } 31 | if ('' + res.value === 'null') { 32 | return res.value; 33 | } 34 | if ('' + res.value === 'undefined') { 35 | return res.value; 36 | } 37 | return res.value; 38 | } 39 | } 40 | return result; 41 | } 42 | 43 | function Arguments() { 44 | //TODO: add es3 'arguments.callee'? 45 | } 46 | 47 | Arguments.prototype.toString = function () { 48 | return '[object Arguments]'; 49 | }; 50 | 51 | function Return(val) { 52 | this.value = val; 53 | } 54 | 55 | // need something unique to compare a against. 56 | var Break = {}; 57 | var Continue = {}; 58 | 59 | function Environment(globalObjects) { 60 | EventEmitter.call(this); 61 | if (!Array.isArray(globalObjects)) { 62 | globalObjects = [globalObjects]; 63 | } 64 | var parent; 65 | globalObjects.forEach(function (vars) { 66 | parent = createVarStore(parent, vars); 67 | }); 68 | // the topmost store is our current store 69 | this._curVarStore = parent; 70 | this._curDeclarations = {}; 71 | this._globalObj = globalObjects[0]; 72 | this._curThis = this._globalObj; 73 | this._boundGen = this._gen.bind(this); 74 | this.DEBUG = false; 75 | this.DELAY = 0; 76 | this.STATE = 'running'; 77 | } 78 | 79 | util.inherits(Environment, EventEmitter); 80 | 81 | function createVarStore(parent, vars) { 82 | vars = vars || {}; 83 | return { 84 | parent: parent, 85 | vars: vars 86 | }; 87 | } 88 | 89 | Environment.prototype.gen = function (node) { 90 | var opts = { 91 | 'locations': true 92 | }; 93 | if (typeof node === 'string') { 94 | node = parse(node, opts); 95 | } 96 | var resp = this._gen(node); 97 | addDeclarationsToStore(this._curDeclarations, this._curVarStore); 98 | this._curDeclarations = {}; 99 | return resp; 100 | }; 101 | 102 | Environment.prototype._gen = function (node) { 103 | var closure = ({ 104 | BinaryExpression: this._genBinExpr, 105 | LogicalExpression: this._genBinExpr, 106 | UnaryExpression: this._genUnaryExpr, 107 | UpdateExpression: this._genUpdExpr, 108 | ObjectExpression: this._genObjExpr, 109 | ArrayExpression: this._genArrExpr, 110 | CallExpression: this._genCallExpr, 111 | NewExpression: this._genNewExpr, 112 | MemberExpression: this._genMemExpr, 113 | ThisExpression: this._genThisExpr, 114 | SequenceExpression: this._genSeqExpr, 115 | Literal: this._genLit, 116 | Identifier: this._genIdent, 117 | AssignmentExpression: this._genAssignExpr, 118 | FunctionDeclaration: this._genFuncDecl, 119 | VariableDeclaration: this._genVarDecl, 120 | BlockStatement: this._genProgram, 121 | Program: this._genProgram, 122 | ExpressionStatement: this._genExprStmt, 123 | EmptyStatement: this._genEmptyStmt, 124 | ReturnStatement: this._genRetStmt, 125 | FunctionExpression: this._genFuncExpr, 126 | IfStatement: this._genIfStmt, 127 | ConditionalExpression: this._genCondStmt, 128 | ForStatement: this._genLoopStmt, 129 | WhileStatement: this._genLoopStmt, 130 | DoWhileStatement: this._genDoWhileStmt, 131 | ForInStatement: this._genForInStmt, 132 | WithStatement: this._genWithStmt, 133 | ThrowStatement: this._genThrowStmt, 134 | TryStatement: this._genTryStmt, 135 | ContinueStatement: this._genContStmt, 136 | BreakStatement: this._genBreakStmt, 137 | SwitchStatement: this._genSwitchStmt 138 | }[node.type] || function () { 139 | console.warn("Not implemented yet: " + node.type); 140 | return noop; 141 | }).call(this, node); 142 | 143 | if (this.DEBUG) { 144 | return function () { 145 | var info = 'closure for ' + node.type + ' called'; 146 | var line = ((node.loc || {}).start || {}).line; 147 | if (line) { 148 | info += ' while processing line ' + line; 149 | } 150 | var resp = closure(); 151 | info += '. Result:'; 152 | console.log(info, resp); 153 | return resp; 154 | }; 155 | } 156 | return closure; 157 | }; 158 | 159 | Environment.prototype._genBinExpr = function (node) { 160 | var a = this._gen(node.left); 161 | var b = this._gen(node.right); 162 | 163 | function* callExpr(expr) { 164 | var result; 165 | if (expr.constructor.name == 'GeneratorFunction') { 166 | result = yield* expr(); 167 | } else { 168 | result = expr(); 169 | } 170 | return result; 171 | } 172 | 173 | var cmp = { 174 | '==': function* () { 175 | return (yield* callExpr(a)) == (yield* callExpr(b)); 176 | }, 177 | '!=': function* () { 178 | return (yield* callExpr(a)) != (yield* callExpr(b)); 179 | }, 180 | '===': function* () { 181 | return (yield* callExpr(a)) === (yield* callExpr(b)); 182 | }, 183 | '!==': function* () { 184 | return (yield* callExpr(a)) !== (yield* callExpr(b)); 185 | }, 186 | '<': function* () { 187 | return (yield* callExpr(a)) < (yield* callExpr(b)); 188 | }, 189 | '<=': function* () { 190 | return (yield* callExpr(a)) <= (yield* callExpr(b)); 191 | }, 192 | '>': function* () { 193 | return (yield* callExpr(a)) > (yield* callExpr(b)); 194 | }, 195 | '>=': function* () { 196 | return (yield* callExpr(a)) >= (yield* callExpr(b)); 197 | }, 198 | '<<': function* () { 199 | return (yield* callExpr(a)) << (yield* callExpr(b)); 200 | }, 201 | '>>': function* () { 202 | return (yield* callExpr(a)) >> (yield* callExpr(b)); 203 | }, 204 | '>>>': function* () { 205 | return (yield* callExpr(a)) >>> (yield* callExpr(b)); 206 | }, 207 | '+': function* () { 208 | return (yield* callExpr(a)) + (yield* callExpr(b)); 209 | }, 210 | '-': function* () { 211 | return (yield* callExpr(a)) - (yield* callExpr(b)); 212 | }, 213 | '*': function* () { 214 | return (yield* callExpr(a)) * (yield* callExpr(b)); 215 | }, 216 | '/': function* () { 217 | return (yield* callExpr(a)) / (yield* callExpr(b)); 218 | }, 219 | '%': function* () { 220 | return (yield* callExpr(a)) % (yield* callExpr(b)); 221 | }, 222 | '|': function* () { 223 | return (yield* callExpr(a)) | (yield* callExpr(b)); 224 | }, 225 | '^': function* () { 226 | return (yield* callExpr(a)) ^ (yield* callExpr(b)); 227 | }, 228 | '&': function* () { 229 | return (yield* callExpr(a)) & (yield* callExpr(b)); 230 | }, 231 | 'in': function* () { 232 | return (yield* callExpr(a)) in (yield* callExpr(b)); 233 | }, 234 | 'instanceof': function* () { 235 | return (yield* callExpr(a)) instanceof (yield* callExpr(b)); 236 | }, 237 | // logic expressions 238 | '||': function* () { 239 | return (yield* callExpr(a)) || (yield* callExpr(b)); 240 | }, 241 | '&&': function* () { 242 | return (yield* callExpr(a)) && (yield* callExpr(b)); 243 | } 244 | }[node.operator]; 245 | 246 | return function () { 247 | // FIXME: Convert to yield* 248 | var iter = cmp(); 249 | var res = iter.next(); 250 | while (!res.done) { 251 | res = iter.next(); 252 | } 253 | return res.value; 254 | }; 255 | }; 256 | 257 | Environment.prototype._genUnaryExpr = function (node) { 258 | if (node.operator === 'delete') { 259 | return this._genDelete(node); 260 | } 261 | var a = this._gen(node.argument); 262 | var op = { 263 | '-': function () { 264 | return -a(); 265 | }, 266 | '+': function () { 267 | return +a(); 268 | }, 269 | '!': function () { 270 | return !a(); 271 | }, 272 | '~': function () { 273 | return ~a(); 274 | }, 275 | 'typeof': function () { 276 | return typeof a(); 277 | }, 278 | 'void': function () { 279 | return void a(); 280 | } 281 | }[node.operator]; 282 | 283 | return function () { 284 | return op(); 285 | }; 286 | }; 287 | 288 | Environment.prototype._genDelete = function (node) { 289 | var obj = this._genObj(node.argument); 290 | var attr = this._genName(node.argument); 291 | 292 | return function () { 293 | return delete obj()[attr()]; 294 | }; 295 | }; 296 | 297 | Environment.prototype._genObjExpr = function (node) { 298 | //TODO property.kind: don't assume init when it can also be set/get 299 | var self = this; 300 | var items = []; 301 | node.properties.forEach(function (property) { 302 | // object expression keys are static so can be calculated 303 | // immediately 304 | var key = self._objKey(property.key)(); 305 | items.push({ 306 | key: key, 307 | getVal: self._gen(property.value) 308 | }); 309 | }); 310 | 311 | return function () { 312 | var result = {}; 313 | items.forEach(function (item) { 314 | result[item.key] = item.getVal(); 315 | }); 316 | return result; 317 | }; 318 | }; 319 | 320 | Environment.prototype._genArrExpr = function (node) { 321 | var items = node.elements.map(this._boundGen); 322 | 323 | return function () { 324 | return items.map(execute); 325 | }; 326 | }; 327 | 328 | Environment.prototype._objKey = function (node) { 329 | var key; 330 | if (node.type === 'Identifier') { 331 | key = node.name; 332 | } else { 333 | key = this._gen(node)(); 334 | } 335 | 336 | return function () { 337 | return key; 338 | }; 339 | }; 340 | 341 | Environment.prototype._genCallExpr = function (node) { 342 | var self = this; 343 | var callee; 344 | if (node.callee.type === 'MemberExpression') { 345 | var obj = self._genObj(node.callee); 346 | var name = self._genName(node.callee); 347 | callee = function () { 348 | var theObj = obj(); 349 | return theObj[name()].bind(theObj); 350 | }; 351 | } else { 352 | callee = self._gen(node.callee); 353 | } 354 | var args = node.arguments.map(self._gen.bind(self)); 355 | 356 | return function* () { 357 | self.emit('line', node.loc.start.line); 358 | var c = callee(); 359 | 360 | if (c === undefined) { 361 | return c; 362 | } 363 | 364 | var result; 365 | var res; 366 | 367 | if (c.next) { 368 | res = yield* c; 369 | result = res.apply(self._globalObj, args.map(execute)); 370 | } else { 371 | result = c.apply(self._globalObj, args.map(execute)); 372 | } 373 | 374 | if (result !== undefined) { 375 | if (result.next) { 376 | res = yield* result; 377 | return res; 378 | } 379 | } 380 | return result; 381 | }; 382 | }; 383 | 384 | Environment.prototype._genNewExpr = function (node) { 385 | var callee = this._gen(node.callee); 386 | var args = node.arguments.map(this._boundGen); 387 | var self = this; 388 | 389 | return function* () { 390 | self.emit('line', node.loc.start.line); 391 | var cl = callee(); 392 | var ar = args.map(execute); 393 | var newObject = Object.create(cl.prototype); 394 | var constructor = cl.apply(newObject, ar); 395 | yield* constructor; 396 | return newObject; 397 | }; 398 | }; 399 | 400 | Environment.prototype._genMemExpr = function (node) { 401 | var self = this; 402 | var obj = this._gen(node.object); 403 | var property = this._memExprProperty(node); 404 | return function () { 405 | self.emit('line', node.loc.start.line); 406 | return obj()[property()]; 407 | }; 408 | }; 409 | 410 | Environment.prototype._memExprProperty = function (node) { 411 | return node.computed ? this._gen(node.property) : this._objKey(node.property); 412 | }; 413 | 414 | Environment.prototype._genThisExpr = function () { 415 | var self = this; 416 | return function () { 417 | return self._curThis; 418 | }; 419 | }; 420 | 421 | Environment.prototype._genSeqExpr = function (node) { 422 | var exprs = node.expressions.map(this._boundGen); 423 | return function () { 424 | var result; 425 | exprs.forEach(function (expr) { 426 | result = expr(); 427 | }); 428 | return result; 429 | }; 430 | }; 431 | 432 | Environment.prototype._genUpdExpr = function (node) { 433 | var self = this; 434 | var update = { 435 | '--true': function (obj, name) { 436 | return --obj[name]; 437 | }, 438 | '--false': function (obj, name) { 439 | return obj[name]--; 440 | }, 441 | '++true': function (obj, name) { 442 | return ++obj[name]; 443 | }, 444 | '++false': function (obj, name) { 445 | return obj[name]++; 446 | } 447 | }[node.operator + node.prefix]; 448 | var obj = this._genObj(node.argument); 449 | var name = this._genName(node.argument); 450 | return function* () { 451 | self.emit('line', node.loc.start.line); 452 | yield; 453 | return update(obj(), name()); 454 | }; 455 | }; 456 | 457 | Environment.prototype._genObj = function (node) { 458 | if (node.type === 'Identifier') { 459 | return this._getVarStore.bind(this, node.name); 460 | } else if (node.type === 'MemberExpression') { 461 | return this._gen(node.object); 462 | } else { 463 | console.warn("Unknown _genObj() type: " + node.type); 464 | return noop; 465 | } 466 | }; 467 | 468 | Environment.prototype._genName = function (node) { 469 | if (node.type === 'Identifier') { 470 | return function () { 471 | return node.name; 472 | }; 473 | } else if (node.type === 'MemberExpression') { 474 | return this._memExprProperty(node); 475 | } else { 476 | console.warn("Unknown _genName() type: " + node.type); 477 | return noop; 478 | } 479 | }; 480 | 481 | Environment.prototype._genLit = function (node) { 482 | return function () { 483 | return node.value; 484 | }; 485 | }; 486 | 487 | Environment.prototype._genIdent = function (node) { 488 | var self = this; 489 | return function () { 490 | return self._getVarStore(node.name)[node.name]; 491 | }; 492 | }; 493 | 494 | Environment.prototype._getVarStore = function (name) { 495 | var store = this._curVarStore; 496 | do { 497 | if (store.vars.hasOwnProperty(name)) { 498 | return store.vars; 499 | } 500 | } while ((store = store.parent)); 501 | 502 | // global object as fallback 503 | return this._globalObj; 504 | }; 505 | 506 | Environment.prototype._genAssignExpr = function (node) { 507 | var self = this; 508 | var setter = { 509 | '=': function (obj, name, val) { 510 | return (obj[name] = val); 511 | }, 512 | '+=': function (obj, name, val) { 513 | return obj[name] += val; 514 | }, 515 | '-=': function (obj, name, val) { 516 | return obj[name] -= val; 517 | }, 518 | '*=': function (obj, name, val) { 519 | return obj[name] *= val; 520 | }, 521 | '/=': function (obj, name, val) { 522 | return obj[name] /= val; 523 | }, 524 | '%=': function (obj, name, val) { 525 | return obj[name] %= val; 526 | }, 527 | '<<=': function (obj, name, val) { 528 | return obj[name] <<= val; 529 | }, 530 | '>>=': function (obj, name, val) { 531 | return obj[name] >>= val; 532 | }, 533 | '>>>=': function (obj, name, val) { 534 | return obj[name] >>>= val; 535 | }, 536 | '|=': function (obj, name, val) { 537 | return obj[name] |= val; 538 | }, 539 | '^=': function (obj, name, val) { 540 | return obj[name] ^= val; 541 | }, 542 | '&=': function (obj, name, val) { 543 | return obj[name] &= val; 544 | } 545 | }[node.operator]; 546 | var obj = this._genObj(node.left); 547 | var name = this._genName(node.left); 548 | var val = this._gen(node.right); 549 | return function* () { 550 | self.emit('line', node.left.loc.start.line); 551 | var v = val(); 552 | if (v !== undefined) { 553 | if (v.next) { 554 | v = yield* v; 555 | } 556 | } 557 | return setter(obj(), name(), v); 558 | }; 559 | }; 560 | 561 | Environment.prototype._genFuncDecl = function (node) { 562 | this._curDeclarations[node.id.name] = this._genFuncExpr(node); 563 | return function* () { 564 | return noop; 565 | }; 566 | }; 567 | 568 | Environment.prototype._genVarDecl = function (node) { 569 | var assignments = []; 570 | for (var i = 0; i < node.declarations.length; i++) { 571 | var decl = node.declarations[i]; 572 | this._curDeclarations[decl.id.name] = noop; 573 | if (decl.init) { 574 | assignments.push({ 575 | type: 'AssignmentExpression', 576 | operator: '=', 577 | left: decl.id, 578 | right: decl.init 579 | }); 580 | } 581 | } 582 | return this._gen({ 583 | type: 'BlockStatement', 584 | body: assignments 585 | }); 586 | }; 587 | 588 | Environment.prototype.getState = function () { 589 | return this.STATE; 590 | }; 591 | 592 | Environment.prototype.setState = function (state) { 593 | this.STATE = state; 594 | }; 595 | 596 | Environment.prototype._genFuncExpr = function (node) { 597 | var self = this; 598 | 599 | var oldDeclarations = self._curDeclarations; 600 | self._curDeclarations = {}; 601 | var body = self._gen(node.body); 602 | var declarations = self._curDeclarations; 603 | self._curDeclarations = oldDeclarations; 604 | 605 | // reset var store 606 | return function () { 607 | var parent = self._curVarStore; 608 | return function* () { 609 | // build arguments object 610 | var args = new Arguments(); 611 | args.length = arguments.length; 612 | for (var i = 0; i < arguments.length; i++) { 613 | args[i] = arguments[i]; 614 | } 615 | 616 | // switch interpreter 'stack' 617 | var oldStore = self._curVarStore; 618 | var oldThis = self._curThis; 619 | self._curVarStore = createVarStore(parent); 620 | self._curThis = this; 621 | 622 | addDeclarationsToStore(declarations, self._curVarStore); 623 | self._curVarStore.vars.arguments = args; 624 | 625 | // add function args to var store 626 | node.params.forEach(function (param, i) { 627 | self._curVarStore.vars[param.name] = args[i]; 628 | }); 629 | 630 | // run function body 631 | var result = yield* body(); 632 | 633 | // switch 'stack' back 634 | self._curThis = oldThis; 635 | self._curVarStore = oldStore; 636 | 637 | if (result instanceof Return) { 638 | return result.value; 639 | } 640 | }; 641 | }; 642 | }; 643 | 644 | function addDeclarationsToStore(declarations, varStore) { 645 | for (var key in declarations) { 646 | if (declarations.hasOwnProperty(key) && !varStore.vars.hasOwnProperty(key)) { 647 | varStore.vars[key] = declarations[key](); 648 | } 649 | } 650 | } 651 | 652 | Environment.prototype._genProgram = function (node) { 653 | var self = this; 654 | var stmtClosures = node.body.map(function (stmt) { 655 | return self._gen(stmt); 656 | }); 657 | 658 | return function* () { 659 | var result; 660 | for (var i = 0; i < stmtClosures.length; i++) { 661 | if (stmtClosures[i].constructor.name === 'GeneratorFunction') { 662 | result = yield* stmtClosures[i](); 663 | yield; 664 | } else { 665 | result = stmtClosures[i](); 666 | yield; 667 | } 668 | if (result === Break || result === Continue || result instanceof Return) { 669 | break; 670 | } 671 | } 672 | //return last 673 | return result; 674 | }; 675 | }; 676 | 677 | Environment.prototype._genExprStmt = function (node) { 678 | return this._gen(node.expression); 679 | }; 680 | 681 | Environment.prototype._genEmptyStmt = function () { 682 | return noop; 683 | }; 684 | 685 | Environment.prototype._genRetStmt = function (node) { 686 | var self = this; 687 | var arg = node.argument ? this._gen(node.argument) : noop; 688 | return function () { 689 | self.emit('line', node.loc.start.line); 690 | return new Return(arg()); 691 | }; 692 | }; 693 | 694 | Environment.prototype._genIfStmt = function (node) { 695 | var self = this; 696 | var test = function () { 697 | self.emit('line', node.loc.start.line); 698 | return self._gen(node.test)(); 699 | }; 700 | var consequent = this._gen(node.consequent); 701 | var alternate = node.alternate ? this._gen(node.alternate) : function* () { 702 | return noop; 703 | }; 704 | 705 | return function* () { 706 | var result = test() ? yield* consequent() : yield* alternate(); 707 | return result; 708 | }; 709 | }; 710 | 711 | Environment.prototype._genCondStmt = function (node) { 712 | var self = this; 713 | var test = function () { 714 | self.emit('line', node.loc.start.line); 715 | return self._gen(node.test)(); 716 | }; 717 | var consequent = this._gen(node.consequent); 718 | var alternate = node.alternate ? this._gen(node.alternate) : noop; 719 | 720 | return function () { 721 | return test() ? consequent() : alternate(); 722 | }; 723 | }; 724 | 725 | Environment.prototype._genLoopStmt = function (node, body) { 726 | var self = this; 727 | var init = node.init ? this._gen(node.init) : function* () { 728 | return noop; 729 | }; 730 | var test = node.test ? function* () { 731 | self.emit('line', node.loc.start.line); 732 | return self._gen(node.test)(); 733 | } : function* () { 734 | return true; 735 | }; 736 | var update = node.update ? this._gen(node.update) : function* () { 737 | return noop; 738 | }; 739 | body = body || this._gen(node.body); 740 | 741 | return function* () { 742 | self.emit('line', node.loc.start.line); 743 | var resp; 744 | for (yield* init(); yield* test(); yield* update()) { 745 | var newResp = yield* body(); 746 | 747 | if (newResp === Break) { 748 | break; 749 | } 750 | if (newResp === Continue) { 751 | continue; 752 | } 753 | resp = newResp; 754 | if (newResp instanceof Return) { 755 | break; 756 | } 757 | } 758 | return resp; 759 | }; 760 | }; 761 | 762 | Environment.prototype._genDoWhileStmt = function (node) { 763 | var body = this._gen(node.body); 764 | var loop = this._genLoopStmt(node, body); 765 | 766 | return function* () { 767 | yield* body(); 768 | yield* loop(); 769 | }; 770 | }; 771 | 772 | Environment.prototype._genForInStmt = function (node) { 773 | var self = this; 774 | var right = self._gen(node.right); 775 | var body = self._gen(node.body); 776 | 777 | var left = node.left; 778 | if (left.type === 'VariableDeclaration') { 779 | self._curDeclarations[left.declarations[0].id.name] = noop; 780 | left = left.declarations[0].id; 781 | } 782 | return function* () { 783 | self.emit('line', node.loc.start.line); 784 | var resp; 785 | for (var x in right()) { 786 | self.emit('line', node.loc.start.line); 787 | yield* self._genAssignExpr({ 788 | operator: '=', 789 | left: left, 790 | right: { 791 | type: 'Literal', 792 | value: x 793 | } 794 | })(); 795 | resp = yield* body(); 796 | } 797 | return resp; 798 | }; 799 | }; 800 | 801 | Environment.prototype._genWithStmt = function (node) { 802 | var self = this; 803 | var obj = self._gen(node.object); 804 | var body = self._gen(node.body); 805 | return function* () { 806 | self._curVarStore = createVarStore(self._curVarStore, obj()); 807 | var result = yield* body(); 808 | self._curVarStore = self._curVarStore.parent; 809 | return result; 810 | }; 811 | }; 812 | 813 | Environment.prototype._genThrowStmt = function (node) { 814 | var arg = this._gen(node.argument); 815 | return function () { 816 | throw arg(); 817 | }; 818 | }; 819 | 820 | Environment.prototype._genTryStmt = function (node) { 821 | var block = this._gen(node.block); 822 | var handler = this._genCatchHandler(node.handler); 823 | var finalizer = node.finalizer ? this._gen(node.finalizer) : function (x) { 824 | return x; 825 | }; 826 | 827 | return function () { 828 | try { 829 | return finalizer(block()); 830 | } catch (err) { 831 | return finalizer(handler(err)); 832 | } 833 | }; 834 | }; 835 | 836 | Environment.prototype._genCatchHandler = function (node) { 837 | if (!node) { 838 | return noop; 839 | } 840 | var self = this; 841 | var body = self._gen(node.body); 842 | return function (err) { 843 | var old = self._curVarStore.vars[node.param.name]; 844 | self._curVarStore.vars[node.param.name] = err; 845 | var resp = body(); 846 | self._curVarStore.vars[node.param.name] = old; 847 | 848 | return resp; 849 | }; 850 | }; 851 | 852 | Environment.prototype._genContStmt = function () { 853 | return function () { 854 | return Continue; 855 | }; 856 | }; 857 | 858 | Environment.prototype._genBreakStmt = function () { 859 | return function () { 860 | return Break; 861 | }; 862 | }; 863 | 864 | Environment.prototype._genSwitchStmt = function (node) { 865 | var self = this; 866 | 867 | var discriminant = self._gen(node.discriminant); 868 | var cases = node.cases.map(function (curCase) { 869 | return { 870 | test: curCase.test ? self._gen(curCase.test) : null, 871 | code: self._genProgram({ body: curCase.consequent }) 872 | }; 873 | }); 874 | 875 | return function* () { 876 | var foundMatch = false; 877 | var discriminantVal = discriminant(); 878 | var resp, defaultCase; 879 | 880 | for (var i = 0; i < cases.length; i++) { 881 | var curCase = cases[i]; 882 | if (!foundMatch) { 883 | if (!curCase.test) { 884 | defaultCase = curCase; 885 | continue; 886 | } 887 | if (discriminantVal !== curCase.test()) { 888 | continue; 889 | } 890 | foundMatch = true; 891 | } 892 | // foundMatch is guaranteed to be true here 893 | var newResp = yield* curCase.code(); 894 | if (newResp === Break) { 895 | return resp; 896 | } 897 | resp = newResp; 898 | if (resp === Continue || resp instanceof Return) { 899 | return resp; 900 | } 901 | } 902 | if (!foundMatch && defaultCase) { 903 | return yield* defaultCase.code(); 904 | } 905 | }; 906 | }; 907 | 908 | exports.Environment = Environment; 909 | exports.evaluate = function (code) { 910 | var env = new Environment(global); 911 | var iterator = env.gen(code)(); 912 | var result = iterator.next(); 913 | while (!result.done) { 914 | result = iterator.next(); 915 | } 916 | return result.value; 917 | }; 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e,r=this,n=this.start,i=this.startLoc,s=this.options.ecmaVersion>=8;if(this.options.ecmaVersion>=6){this.next();var a,o,c=this.start,u=this.startLoc,h=[],p=!0,l=!1,f=new G,d=this.yieldPos,m=this.awaitPos;for(this.yieldPos=0,this.awaitPos=0;this.type!==I.parenR;){if(p?p=!1:r.expect(I.comma),s&&r.afterTrailingComma(I.parenR,!0)){l=!0;break}if(r.type===I.ellipsis){a=r.start,h.push(r.parseParenItem(r.parseRest())),r.type===I.comma&&r.raise(r.start,"Comma is not permitted after the rest element");break}r.type!==I.parenL||o||(o=r.start),h.push(r.parseMaybeAssign(!1,f,r.parseParenItem))}var g=this.start,y=this.startLoc;if(this.expect(I.parenR),t&&!this.canInsertSemicolon()&&this.eat(I.arrow))return 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r=this,n=this.startNode(),i=!0,s={};for(n.properties=[],this.next();!this.eat(I.braceR);){if(i)i=!1;else if(r.expect(I.comma),r.afterTrailingComma(I.braceR))break;var a,o,c,u,h=r.startNode();r.options.ecmaVersion>=6&&(h.method=!1,h.shorthand=!1,(t||e)&&(c=r.start,u=r.startLoc),t||(a=r.eat(I.star))),r.parsePropertyName(h),t||!(r.options.ecmaVersion>=8)||a||h.computed||"Identifier"!==h.key.type||"async"!==h.key.name||r.type===I.parenL||r.type===I.colon||r.canInsertSemicolon()?o=!1:(o=!0,r.parsePropertyName(h,e)),r.parsePropertyValue(h,t,a,o,c,u,e),r.checkPropClash(h,s),n.properties.push(r.finishNode(h,"Property"))}return this.finishNode(n,t?"ObjectPattern":"ObjectExpression")},Q.parsePropertyValue=function(t,e,r,n,i,s,a){if((r||n)&&this.type===I.colon&&this.unexpected(),this.eat(I.colon))t.value=e?this.parseMaybeDefault(this.start,this.startLoc):this.parseMaybeAssign(!1,a),t.kind="init";else if(this.options.ecmaVersion>=6&&this.type===I.parenL)e&&this.unexpected(),t.kind="init",t.method=!0,t.value=this.parseMethod(r,n);else if(this.options.ecmaVersion>=5&&!t.computed&&"Identifier"===t.key.type&&("get"===t.key.name||"set"===t.key.name)&&this.type!=I.comma&&this.type!=I.braceR){(r||n||e)&&this.unexpected(),t.kind=t.key.name,this.parsePropertyName(t),t.value=this.parseMethod(!1);var o="get"===t.kind?0:1;if(t.value.params.length!==o){var c=t.value.start;"get"===t.kind?this.raiseRecoverable(c,"getter should have no params"):this.raiseRecoverable(c,"setter should have exactly one param")}else"set"===t.kind&&"RestElement"===t.value.params[0].type&&this.raiseRecoverable(t.value.params[0].start,"Setter cannot use rest params")}else this.options.ecmaVersion>=6&&!t.computed&&"Identifier"===t.key.type?((this.keywords.test(t.key.name)||(this.strict?this.reservedWordsStrict:this.reservedWords).test(t.key.name)||this.inGenerator&&"yield"==t.key.name||this.inAsync&&"await"==t.key.name)&&this.raiseRecoverable(t.key.start,"'"+t.key.name+"' can not be used as shorthand property"),t.kind="init",e?t.value=this.parseMaybeDefault(i,s,t.key):this.type===I.eq&&a?(a.shorthandAssign||(a.shorthandAssign=this.start),t.value=this.parseMaybeDefault(i,s,t.key)):t.value=t.key,t.shorthand=!0):this.unexpected()},Q.parsePropertyName=function(t){if(this.options.ecmaVersion>=6){if(this.eat(I.bracketL))return t.computed=!0,t.key=this.parseMaybeAssign(),this.expect(I.bracketR),t.key;t.computed=!1}return t.key=this.type===I.num||this.type===I.string?this.parseExprAtom():this.parseIdent(!0)},Q.initFunction=function(t){t.id=null,this.options.ecmaVersion>=6&&(t.generator=!1,t.expression=!1),this.options.ecmaVersion>=8&&(t.async=!1)},Q.parseMethod=function(t,e){var r=this.startNode(),n=this.inGenerator,i=this.inAsync,s=this.yieldPos,a=this.awaitPos;return this.initFunction(r),this.options.ecmaVersion>=6&&(r.generator=t),this.options.ecmaVersion>=8&&(r.async=!!e),this.inGenerator=r.generator,this.inAsync=r.async,this.yieldPos=0,this.awaitPos=0,this.expect(I.parenL),r.params=this.parseBindingList(I.parenR,!1,this.options.ecmaVersion>=8),this.checkYieldAwaitInDefaultParams(),this.parseFunctionBody(r,!1),this.inGenerator=n,this.inAsync=i,this.yieldPos=s,this.awaitPos=a,this.finishNode(r,"FunctionExpression")},Q.parseArrowExpression=function(t,e,r){var n=this.inGenerator,i=this.inAsync,s=this.yieldPos,a=this.awaitPos;return this.initFunction(t),this.options.ecmaVersion>=8&&(t.async=!!r),this.inGenerator=!1,this.inAsync=t.async,this.yieldPos=0,this.awaitPos=0,t.params=this.toAssignableList(e,!0),this.parseFunctionBody(t,!0),this.inGenerator=n,this.inAsync=i,this.yieldPos=s,this.awaitPos=a,this.finishNode(t,"ArrowFunctionExpression")},Q.parseFunctionBody=function(t,e){var r=e&&this.type!==I.braceL;if(r)t.body=this.parseMaybeAssign(),t.expression=!0;else{var n=this.inFunction,i=this.labels;this.inFunction=!0,this.labels=[],t.body=this.parseBlock(!0),t.expression=!1,this.inFunction=n,this.labels=i}var s=!r&&t.body.body.length&&this.isUseStrict(t.body.body[0])?t.body.body[0]:null;if(s&&this.options.ecmaVersion>=7&&!this.isSimpleParamList(t.params)&&this.raiseRecoverable(s.start,"Illegal 'use strict' directive in function with non-simple parameter list"),this.strict||s){var a=this.strict;this.strict=!0,t.id&&this.checkLVal(t.id,!0),this.checkParams(t),this.strict=a}else!e&&this.isSimpleParamList(t.params)||this.checkParams(t)},Q.isSimpleParamList=function(t){for(var e=0;e=6||this.input.slice(this.start,this.end).indexOf("\\")==-1)&&this.raiseRecoverable(this.start,"The keyword '"+this.value+"' is reserved"),this.inGenerator&&"yield"===this.value&&this.raiseRecoverable(this.start,"Can not use 'yield' as identifier inside a generator"),this.inAsync&&"await"===this.value&&this.raiseRecoverable(this.start,"Can not use 'await' as identifier inside an async function"),e.name=this.value):t&&this.type.keyword?e.name=this.type.keyword:this.unexpected(),this.next(),this.finishNode(e,"Identifier")},Q.parseYield=function(){this.yieldPos||(this.yieldPos=this.start);var t=this.startNode();return this.next(),this.type==I.semi||this.canInsertSemicolon()||this.type!=I.star&&!this.type.startsExpr?(t.delegate=!1,t.argument=null):(t.delegate=this.eat(I.star),t.argument=this.parseMaybeAssign()),this.finishNode(t,"YieldExpression")},Q.parseAwait=function(){this.awaitPos||(this.awaitPos=this.start);var t=this.startNode();return this.next(),t.argument=this.parseMaybeUnary(null,!0),this.finishNode(t,"AwaitExpression")};var X=U.prototype;X.raise=function(t,e){var r=u(this.input,t);e+=" ("+r.line+":"+r.column+")";var n=new SyntaxError(e);throw n.pos=t,n.loc=r,n.raisedAt=this.pos,n},X.raiseRecoverable=X.raise,X.curPosition=function(){if(this.options.locations)return new j(this.curLine,this.pos-this.lineStart)};var Z=function(t,e,r){this.type="",this.start=e,this.end=0,t.options.locations&&(this.loc=new Y(t,r)),t.options.directSourceFile&&(this.sourceFile=t.options.directSourceFile),t.options.ranges&&(this.range=[e,0])},tt=U.prototype;tt.startNode=function(){return new Z(this,this.start,this.startLoc)},tt.startNodeAt=function(t,e){return new Z(this,t,e)},tt.finishNode=function(t,e){return f.call(this,t,e,this.lastTokEnd,this.lastTokEndLoc)},tt.finishNodeAt=function(t,e,r,n){return f.call(this,t,e,r,n)};var et=function(t,e,r,n){this.token=t,this.isExpr=!!e,this.preserveSpace=!!r,this.override=n},rt={b_stat:new et("{",!1),b_expr:new et("{",!0),b_tmpl:new et("${",!0),p_stat:new et("(",!1),p_expr:new et("(",!0),q_tmpl:new et("`",!0,!0,function(t){return t.readTmplToken()}),f_expr:new et("function",!0)},nt=U.prototype;nt.initialContext=function(){return[rt.b_stat]},nt.braceIsBlock=function(t){if(t===I.colon){var e=this.curContext();if(e===rt.b_stat||e===rt.b_expr)return!e.isExpr}return t===I._return?O.test(this.input.slice(this.lastTokEnd,this.start)):t===I._else||t===I.semi||t===I.eof||t===I.parenR||(t==I.braceL?this.curContext()===rt.b_stat:!this.exprAllowed)},nt.updateContext=function(t){var e,r=this.type;r.keyword&&t==I.dot?this.exprAllowed=!1:(e=r.updateContext)?e.call(this,t):this.exprAllowed=r.beforeExpr},I.parenR.updateContext=I.braceR.updateContext=function(){if(1==this.context.length)return void(this.exprAllowed=!0);var t=this.context.pop();t===rt.b_stat&&this.curContext()===rt.f_expr?(this.context.pop(),this.exprAllowed=!1):t===rt.b_tmpl?this.exprAllowed=!0:this.exprAllowed=!t.isExpr},I.braceL.updateContext=function(t){this.context.push(this.braceIsBlock(t)?rt.b_stat:rt.b_expr),this.exprAllowed=!0},I.dollarBraceL.updateContext=function(){this.context.push(rt.b_tmpl),this.exprAllowed=!0},I.parenL.updateContext=function(t){var 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t=this,e=this.options.onComment&&this.curPosition(),r=this.pos,n=this.input.indexOf("*/",this.pos+=2);if(n===-1&&this.raise(this.pos-2,"Unterminated comment"),this.pos=n+2,this.options.locations){V.lastIndex=r;for(var i;(i=V.exec(this.input))&&i.index8&&e<14||e>=5760&&F.test(String.fromCharCode(e))))break t;++t.pos}}},st.finishToken=function(t,e){this.end=this.pos,this.options.locations&&(this.endLoc=this.curPosition());var r=this.type;this.type=t,this.value=e,this.updateContext(r)},st.readToken_dot=function(){var t=this.input.charCodeAt(this.pos+1);if(t>=48&&t<=57)return this.readNumber(!0);var e=this.input.charCodeAt(this.pos+2);return this.options.ecmaVersion>=6&&46===t&&46===e?(this.pos+=3,this.finishToken(I.ellipsis)):(++this.pos,this.finishToken(I.dot))},st.readToken_slash=function(){var t=this.input.charCodeAt(this.pos+1);return this.exprAllowed?(++this.pos,this.readRegexp()):61===t?this.finishOp(I.assign,2):this.finishOp(I.slash,1)},st.readToken_mult_modulo_exp=function(t){var e=this.input.charCodeAt(this.pos+1),r=1,n=42===t?I.star:I.modulo;return this.options.ecmaVersion>=7&&42===e&&(++r,n=I.starstar,e=this.input.charCodeAt(this.pos+2)),61===e?this.finishOp(I.assign,r+1):this.finishOp(n,r)},st.readToken_pipe_amp=function(t){var e=this.input.charCodeAt(this.pos+1);return e===t?this.finishOp(124===t?I.logicalOR:I.logicalAND,2):61===e?this.finishOp(I.assign,2):this.finishOp(124===t?I.bitwiseOR:I.bitwiseAND,1)},st.readToken_caret=function(){var t=this.input.charCodeAt(this.pos+1);return 61===t?this.finishOp(I.assign,2):this.finishOp(I.bitwiseXOR,1)},st.readToken_plus_min=function(t){var e=this.input.charCodeAt(this.pos+1);return e===t?45==e&&62==this.input.charCodeAt(this.pos+2)&&O.test(this.input.slice(this.lastTokEnd,this.pos))?(this.skipLineComment(3),this.skipSpace(),this.nextToken()):this.finishOp(I.incDec,2):61===e?this.finishOp(I.assign,2):this.finishOp(I.plusMin,1)},st.readToken_lt_gt=function(t){var e=this.input.charCodeAt(this.pos+1),r=1;return e===t?(r=62===t&&62===this.input.charCodeAt(this.pos+2)?3:2,61===this.input.charCodeAt(this.pos+r)?this.finishOp(I.assign,r+1):this.finishOp(I.bitShift,r)):33==e&&60==t&&45==this.input.charCodeAt(this.pos+2)&&45==this.input.charCodeAt(this.pos+3)?(this.inModule&&this.unexpected(),this.skipLineComment(4),this.skipSpace(),this.nextToken()):(61===e&&(r=2),this.finishOp(I.relational,r))},st.readToken_eq_excl=function(t){var e=this.input.charCodeAt(this.pos+1);return 61===e?this.finishOp(I.equality,61===this.input.charCodeAt(this.pos+2)?3:2):61===t&&62===e&&this.options.ecmaVersion>=6?(this.pos+=2,this.finishToken(I.arrow)):this.finishOp(61===t?I.eq:I.prefix,1)},st.getTokenFromCode=function(t){switch(t){case 46:return this.readToken_dot();case 40:return++this.pos,this.finishToken(I.parenL);case 41:return++this.pos,this.finishToken(I.parenR);case 59:return++this.pos,this.finishToken(I.semi);case 44:return++this.pos,this.finishToken(I.comma);case 91:return++this.pos,this.finishToken(I.bracketL);case 93:return++this.pos,this.finishToken(I.bracketR);case 123:return++this.pos,this.finishToken(I.braceL);case 125:return++this.pos,this.finishToken(I.braceR);case 58:return++this.pos,this.finishToken(I.colon);case 63:return++this.pos,this.finishToken(I.question);case 96:if(this.options.ecmaVersion<6)break;return++this.pos,this.finishToken(I.backQuote);case 48:var e=this.input.charCodeAt(this.pos+1);if(120===e||88===e)return this.readRadixNumber(16);if(this.options.ecmaVersion>=6){if(111===e||79===e)return this.readRadixNumber(8);if(98===e||66===e)return this.readRadixNumber(2)}case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.readNumber(!1);case 34:case 39:return this.readString(t);case 47:return this.readToken_slash();case 37:case 42:return this.readToken_mult_modulo_exp(t);case 124:case 38:return this.readToken_pipe_amp(t);case 94:return this.readToken_caret();case 43:case 45:return this.readToken_plus_min(t);case 60:case 62:return this.readToken_lt_gt(t);case 61:case 33:return this.readToken_eq_excl(t);case 126:return this.finishOp(I.prefix,1)}this.raise(this.pos,"Unexpected character '"+m(t)+"'")},st.finishOp=function(t,e){var r=this.input.slice(this.pos,this.pos+e);return this.pos+=e,this.finishToken(t,r)};var ot=!!d("￿","u");st.readRegexp=function(){for(var t,e,r=this,n=this.pos;;){r.pos>=r.input.length&&r.raise(n,"Unterminated regular expression");var i=r.input.charAt(r.pos);if(O.test(i)&&r.raise(n,"Unterminated regular expression"),t)t=!1;else{if("["===i)e=!0;else if("]"===i&&e)e=!1;else if("/"===i&&!e)break;t="\\"===i}++r.pos}var s=this.input.slice(n,this.pos);++this.pos;var a=this.readWord1(),o=s,c="";if(a){var u=/^[gim]*$/;this.options.ecmaVersion>=6&&(u=/^[gimuy]*$/),u.test(a)||this.raise(n,"Invalid regular expression flag"),a.indexOf("u")>=0&&(ot?c="u":(o=o.replace(/\\u\{([0-9a-fA-F]+)\}/g,function(t,e,i){return e=Number("0x"+e),e>1114111&&r.raise(n+i+3,"Code point out of bounds"),"x"}),o=o.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g,"x"),c=c.replace("u","")))}var h=null;return at||(d(o,c,n,this),h=d(s,a)),this.finishToken(I.regexp,{pattern:s,flags:a,value:h})},st.readInt=function(t,e){for(var r=this,n=this.pos,i=0,s=0,a=null==e?1/0:e;s=97?c-97+10:c>=65?c-65+10:c>=48&&c<=57?c-48:1/0,o>=t)break;++r.pos,i=i*t+o}return this.pos===n||null!=e&&this.pos-n!==e?null:i},st.readRadixNumber=function(t){this.pos+=2;var e=this.readInt(t);return null==e&&this.raise(this.start+2,"Expected number in radix "+t),r(this.fullCharCodeAtPos())&&this.raise(this.pos,"Identifier directly after number"),this.finishToken(I.num,e)},st.readNumber=function(t){var e=this.pos,n=!1,i=48===this.input.charCodeAt(this.pos);t||null!==this.readInt(10)||this.raise(e,"Invalid number"),i&&this.pos==e+1&&(i=!1);var s=this.input.charCodeAt(this.pos);46!==s||i||(++this.pos,this.readInt(10),n=!0,s=this.input.charCodeAt(this.pos)),69!==s&&101!==s||i||(s=this.input.charCodeAt(++this.pos),43!==s&&45!==s||++this.pos,null===this.readInt(10)&&this.raise(e,"Invalid number"),n=!0),r(this.fullCharCodeAtPos())&&this.raise(this.pos,"Identifier directly after number");var a,o=this.input.slice(e,this.pos);return n?a=parseFloat(o):i&&1!==o.length?/[89]/.test(o)||this.strict?this.raise(e,"Invalid number"):a=parseInt(o,8):a=parseInt(o,10),this.finishToken(I.num,a)},st.readCodePoint=function(){var t,e=this.input.charCodeAt(this.pos);if(123===e){this.options.ecmaVersion<6&&this.unexpected();var r=++this.pos;t=this.readHexChar(this.input.indexOf("}",this.pos)-this.pos),++this.pos,t>1114111&&this.raise(r,"Code point out of bounds")}else t=this.readHexChar(4);return t},st.readString=function(t){for(var e=this,r="",n=++this.pos;;){e.pos>=e.input.length&&e.raise(e.start,"Unterminated string constant");var i=e.input.charCodeAt(e.pos);if(i===t)break;92===i?(r+=e.input.slice(n,e.pos),r+=e.readEscapedChar(!1),n=e.pos):(a(i)&&e.raise(e.start,"Unterminated string constant"),++e.pos)}return r+=this.input.slice(n,this.pos++),this.finishToken(I.string,r)},st.readTmplToken=function(){for(var t=this,e="",r=this.pos;;){t.pos>=t.input.length&&t.raise(t.start,"Unterminated template");var n=t.input.charCodeAt(t.pos);if(96===n||36===n&&123===t.input.charCodeAt(t.pos+1))return t.pos===t.start&&t.type===I.template?36===n?(t.pos+=2,t.finishToken(I.dollarBraceL)):(++t.pos,t.finishToken(I.backQuote)):(e+=t.input.slice(r,t.pos),t.finishToken(I.template,e));if(92===n)e+=t.input.slice(r,t.pos),e+=t.readEscapedChar(!0),r=t.pos;else if(a(n)){switch(e+=t.input.slice(r,t.pos),++t.pos,n){case 13:10===t.input.charCodeAt(t.pos)&&++t.pos;case 10:e+="\n";break;default:e+=String.fromCharCode(n)}t.options.locations&&(++t.curLine,t.lineStart=t.pos),r=t.pos}else++t.pos}},st.readEscapedChar=function(t){var e=this.input.charCodeAt(++this.pos);switch(++this.pos,e){case 110:return"\n";case 114:return"\r";case 120:return String.fromCharCode(this.readHexChar(2));case 117:return m(this.readCodePoint());case 116:return"\t";case 98:return"\b";case 118:return"\v";case 102:return"\f";case 13:10===this.input.charCodeAt(this.pos)&&++this.pos;case 10:return this.options.locations&&(this.lineStart=this.pos,++this.curLine),"";default:if(e>=48&&e<=55){var r=this.input.substr(this.pos-1,3).match(/^[0-7]+/)[0],n=parseInt(r,8);return n>255&&(r=r.slice(0,-1),n=parseInt(r,8)),"0"!==r&&(this.strict||t)&&this.raise(this.pos-2,"Octal literal in strict mode"),this.pos+=r.length-1,String.fromCharCode(n)}return String.fromCharCode(e)}},st.readHexChar=function(t){var e=this.pos,r=this.readInt(16,t);return null===r&&this.raise(e,"Bad character escape sequence"),r},st.readWord1=function(){var t=this;this.containsEsc=!1;for(var e="",i=!0,s=this.pos,a=this.options.ecmaVersion>=6;this.pos=6||!this.containsEsc)&&this.keywords.test(t)&&(e=T[t]),this.finishToken(e,t)};var ct="4.0.4";t.version=ct,t.parse=g,t.parseExpressionAt=y,t.tokenizer=v,t.addLooseExports=x,t.Parser=U,t.plugins=M,t.defaultOptions=B,t.Position=j,t.SourceLocation=Y,t.getLineInfo=u,t.Node=Z,t.TokenType=R,t.tokTypes=I,t.TokContext=et,t.tokContexts=rt,t.isIdentifierChar=n,t.isIdentifierStart=r,t.Token=it,t.isNewLine=a,t.lineBreak=O,t.lineBreakG=V,Object.defineProperty(t,"__esModule",{value:!0})})},{}],evaljs:[function(t,e,r){(function(n,i){function s(){}function a(t){var e=t();if(""+e=="null")return e;if(void 0!==e&&e.next){for(var r=e,n=r.next();!n.done;)n=r.next();return""+n.value=="null"?n.value:""+n.value=="undefined"?n.value:n.value}return e}function o(){}function c(t){this.value=t}function u(t){d.call(this),Array.isArray(t)||(t=[t]);var 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