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// Should not compile. function f() {} f`not closed \`
JavaScript
// Should not compile. // Error: (4, 46): ')' expected function invalidParam(noDefault, ...restParam, noRestAgain) { // Should fail to parse since non rest param is not allowed after // param. }
JavaScript
function f(...p) { return p; } function g(a, ...p) { return p; } assertArrayEquals([], f()); assertArrayEquals([0], f(0)); assertArrayEquals([0, 1], f(0, 1)); assertArrayEquals([], g()); assertArrayEquals([], g(0)); assertArrayEquals([1], g(0, 1)); assertArrayEquals([1, 2], g(0, 1, 2));
JavaScript
// Should not compile. // Error: (5, 9): 'identifier' expected var object = { set x(...rest) { // rest is not allowed for set accessor } };
JavaScript
// A binary tree class. class Tree { constructor(label, left, right) { this.label = label; this.left = left; this.right = right; } } // We don't yet support any syntax to set private named fields in classes. import iterator from '@iter'; Tree.prototype[iterator] = function*() { if (this.left) { ...
JavaScript
function* forInGenerator3() { var object = { a: 0, b: { c: 1, }, d: 2 }; for (var key in object) { yield key; for (var key2 in object[key]) { yield key2; } } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String...
JavaScript
function* tryCatchGenerator() { var x; try { yield 1; throw 2; yield 3; } catch (e) { x = e; } yield x; } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ----------------------------------------...
JavaScript
function mapFilterGenerator() { function* map(list, fun) { for (var item of list) { yield fun(item); } } function* filter(list, fun) { for (var item of list) { if (fun(item)) { yield item; } } } // squares even numbers. no intermediate array is created. var numbers ...
JavaScript
function* forInGenerator2() { var object = { a: 0, b: 1, c: 2 }; var key; for (key in object) { if (key == 'a') { delete object.b; object.d = 3; } yield key; yield object[key]; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { r...
JavaScript
// Should not compile. // Options: --generators=false function* range(start, end) { for (var i = start; i < end; i++) { yield i; } }
JavaScript
function* forEachGenerator() { yield* forInGenerator3(); yield* forInGenerator2(); } function* forInGenerator3() { var object = { a: 0, b: { c: 1, }, d: 2 }; for (var key in object) { yield key; for (var key2 in object[key]) { yield key2; } } } function* forInGenera...
JavaScript
// Should not compile. // Options: --forOf=false var s = []; for (var i of yieldFor()) { s.push(i); }
JavaScript
// Should not compile. function simpleGenerator() { yield 1; }
JavaScript
function* tryFinallyGenerator() { var x = 1; var y; // finally inside a catch try { try { yield x; throw 7; x = 2; } finally { x = 3; } } catch (e) { y = e; } yield x * y; // finally with no enclosing try try { y = 11; yield y; } finally { y = 3;...
JavaScript
function* simpleGenerator() { yield 1; } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ---------------------------------------------------------------------------- assertEquals('1', accumulate(simpleGenerator()));
JavaScript
function* whileGenerator(max, continueValue, breakValue) { var i = 0; while (i < max) { i++; if (i == continueValue) { continue; } if (i == breakValue) { break; } yield i; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = resul...
JavaScript
function* ifGenerator(condition) { if (condition) { yield 1; } if (!condition) { yield 2; } if (condition) { yield 3; } else { yield 4; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // --...
JavaScript
function* labelledBreakGenerator() { var x = 1; var y = 2; label: while (true) { x++; while (true) { yield x * y; y++; if (y == 3) { continue label; } yield x * y * 5; if (y == 4) { break label; } yield x * y * 13; } yield x * y * 11;...
JavaScript
function* forInGenerator() { var object = { a: 0, b: 1, c: 2 }; for (var key in object) { if (key == 'a') { delete object.b; object.d = 3; } yield key; yield object[key]; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = ...
JavaScript
function* endYieldGenerator() { yield 1; yield; yield 2; } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ---------------------------------------------------------------------------- assertEquals('1', accumulate(...
JavaScript
function* sequenceGenerator() { var i = 1; yield i; i = 3; yield i + 1; { var x = 3; yield i + x; yield x; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // -------------------------------------...
JavaScript
// yield form within a catch block function* tryCatchYieldGenerator() { var x = 3; try { throw 5; } catch (e) { yield e * x; } } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ---------------------------...
JavaScript
function* doGenerator() { var i = 0; do { if (++i % 2 == 0) continue; yield i; } while (i < 6); } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ------------------------------------------------------------...
JavaScript
function* switchGenerator(val) { switch (val) { case 1: yield val; case 2: yield val * 2; break; case 3: break; default: yield val * 10; } // switch without a default switch (val) { case 1000: yield val; break; } yield val * 5; } function accu...
JavaScript
function* statementTestGenerator() { // all of these statement constructs should be allowed // provided that they contain no yield statements switch (1) { case 2: break; default: break; } try { } catch (e) {} try { } finally {} do {} while (false); for (;false;) {} //TODO(jmesserly): this had...
JavaScript
function* forLexicallyNestedGenerator() { yield* (function*() { yield [1,2,3]; yield* [4,5,6]; })(); } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // -------------------------------------------------------------------...
JavaScript
var finallyVisited = false; function* test() { try { yield 42; } finally { finallyVisited = true; } } var it = test(); it.moveNext(); assertEquals(42, it.current); assertFalse(finallyVisited); it.moveNext(); assertTrue(finallyVisited); finallyVisited = false; for (var i of test()) { assertEquals(42,...
JavaScript
function* forEmptyGenerator() { yield* []; } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = result + String(value); } return result; } // ---------------------------------------------------------------------------- assertEquals('', accumulate(forEmptyGenerator()...
JavaScript
function* forGenerator() { var a = 1, b = 1; for (var i = 0; i < 4; i++) { // TODO(jmesserly): this was changed until we get destructing //[a, b] = [b, a + b]; var t0 = b; var t1 = a + b; a = t0; b = t1; yield a; } } function accumulate(iterator) { var result = ''; for (var value...
JavaScript
// finally inside a try finally function* tryFinallyFinallyGenerator() { var y; try { y = 13; try { yield y; } finally { y = 17; } yield y; } finally { y = 23; } yield y; } function accumulate(iterator) { var result = ''; for (var value of iterator) { result = res...
JavaScript
module m { export var x = 1; export var y = 2; } import * from m; assertEquals(3, x + y);
JavaScript
// Should not compile. // Error: 'd' is not a module module a { export module b { module c from d; } }
JavaScript
// Should not compile. // Error: 'y' is not exported by m // Error: 'z' is not exported by m // Error: 'w' is not exported by m // Error: 'foo' is not exported by '@name' // Error: 'bar' is not exported by '@name' // Error: 'inner' is not exported by outer // Error: 'object' is not a module module m { export var x =...
JavaScript
// Should not compile. // Error: 'c' is not exported by b module a { module b { module c {}; } export {c: d} from b; }
JavaScript
module a { export var i = 0; export function inc() { i++; } } (function() { // TODO(arv): Modules are strict. The codegen for modules should ensure that // they are strict. 'use strict'; assertEquals(0, a.i); a.inc(); assertEquals(1, a.i); assertThrows(function() { a.i = 2; }); })(); //...
JavaScript
// Should not compile. // Error: 'c' is not a module module a { module b from c; }
JavaScript
// Should not compile. // Error: 'c' is not a module module a {} module b from a.c;
JavaScript
// Should not compile. // Error: 'c' is not a module module a {} module b from c;
JavaScript
// Should not compile. // Error: 'c' is not exported by b module a { module b { module c {}; } export {c} from b; }
JavaScript
import * from '@name'; var n1 = new Name(); assertTrue(isName(n1));
JavaScript
// Should not compile. // Error: 'c' is not a module module a { export module b from c; }
JavaScript
// Should not compile. // Error: 'd' is not a module module a { module b {} module c from b.d; }
JavaScript
// Should not compile. // Error: 'c' is not exported by b module a { module b { module c {}; } export c from b; }
JavaScript
module m { export var x = 1; export var y = 2; } import {x: renamedX, y} from m; import x from m; module m2 from m; assertEquals(1, x); assertEquals(1, renamedX); assertEquals(2, y); assertEquals(x, renamedX); assertEquals(x, m.x); // Closure tests cannot handle Object.create(null) assertTrue(m === m2); assertEq...
JavaScript
import {Name: create, isName} from '@name'; import Name from '@name'; module n from '@name' var n1 = create(); var n2 = Name(); var n3 = new Name(); assertTrue(isName(n1)); assertTrue(isName(n2)); assertTrue(isName(n3)); assertEquals(Name, create); assertEquals(n.Name, Name); assertEquals(isName, isName);
JavaScript
// Should not compile. // Error: 'identifier' expected function f(x,) { return x; }
JavaScript
// Should not compile. // Error: initializer is not allowed in for-of loop with pattern // Error: for-of statement may not have initializer for (var {k} = {} of []) { }
JavaScript
// Should not compile. // Options: --destructuring=false var [x, y] = [0, 1];
JavaScript
var object = { set x({message: [head, ...tail], name}) { assertEquals('a', head); assertArrayEquals(['b', 'c'], tail); assertEquals('Error', name); } }; object.x = new Error('abc');
JavaScript
function destructEvaluatesToRvalue() { var a; return [a] = [1, 2, 3]; } // ---------------------------------------------------------------------------- var result = destructEvaluatesToRvalue(); assertArrayEquals([1, 2, 3], result);
JavaScript
function destructScopeThis() { var x; var o = { f: function() { [this.x] = [1]; } }; o.f(); return { x: x, o_x: o.x }; } // ---------------------------------------------------------------------------- var result = destructScopeThis(); assertUndefined(result.x); assertEquals(1, result...
JavaScript
function destructVarDecl() { // Const; and an array inside an object literal inside an array. const a = 0, [b, {c, x: [d]}] = [1, {c: 2, x: [3]}]; // Now an object literal inside an array inside an object literal. var {x: [{e}, f], g} = {x: [{e:4}, 5], g: 6}; // Two patterns in one var. var {h} = {h: 7}, ...
JavaScript
var a, b, c, d; [a, [b, c], d] = ['hello', [',', 'junk'], ['world']]; // ---------------------------------------------------------------------------- assertEquals('hello', a); assertEquals(',', b); assertEquals('junk', c); assertArrayEquals(['world'], d);
JavaScript
class C { constructor({message: [head, ...tail], name}) { assertEquals('a', head); assertArrayEquals(['b', 'c'], tail); assertEquals('Error', name); } method({message: [head, ...tail], name}) { assertEquals('a', head); assertArrayEquals(['b', 'c'], tail); assertEquals('Error', name); } ...
JavaScript
// Should not compile. // Error: innerX is not defined try { throw [0]; } catch ([innerX]) { } innerX;
JavaScript
// Destructuring bind alpha-renames 'arguments'; this ensures that // renaming doesn't rename in nested scopes. function destructNestedScopeArguments(x) { [(function () { return arguments[1]; })(null, x)[0]] = [42]; } // ---------------------------------------------------------------------------- var result = []; d...
JavaScript
function* gen() { yield 'abc'; yield 'def'; } var expectedHeads = ['a', 'd']; var expectedTails = [['b', 'c'], ['e','f']]; var i = 0; for (var [head, ...tail] of gen()) { assertEquals(expectedHeads[i], head); assertArrayEquals(expectedTails[i], tail); i++; } assertEquals(2, i); { let x = 42; for (let {l...
JavaScript
// Should not compile. // Error: (4, 23): Semi-colon expected var f = ([...xs, ys]) => xs;
JavaScript
// Should not compile. // Error: initializer is not allowed in for-in loop with pattern for (var {k} = {} in {}) { }
JavaScript
var f = ({x}) => x; assertEquals(42, f({x: 42})); var g = ({x: y, z: [a, b, ...c]}) => [y, a, b, c]; assertArrayEquals([1, 2, 3, [4, 5]], g({x: 1, z: [2, 3, 4, 5]})); var h = ([a, {b: c, d}]) => [a, c, d]; assertArrayEquals([1, 2, 3], h([1, {b: 2, d: 3}]));
JavaScript
function destructRest() { var a, b, c, d, e; [...a] = [1, 2, 3]; [b, ...c] = [1, 2, 3]; [,,, ...d] = [1, 2, 3]; [...e] = {x: 'boom'}; return {a: a, b: b, c: c, d: d, e: e}; } // ---------------------------------------------------------------------------- var result = destructRest(); assertArrayEquals([1, ...
JavaScript
function f([x] = [1], {y} = {y: 2}) { return x + y; } assertEquals(3, f());
JavaScript
var object = { method({message: [head, ...tail], name}) { assertEquals('a', head); assertArrayEquals(['b', 'c'], tail); assertEquals('Error', name); } }; object.method(new Error('abc'));
JavaScript
function destructObject() { var a, b, c, d; ({a, x: b, y: {c, z: [,d]}} = { a: 7, // field with shorthand a => a: a syntax x: 8, // typical syntax y: { // nested object destructuring // missing binding 'c' z: [10, 11, 12] // nested array destructuring } }); return { a: ...
JavaScript
var head = 'head'; var tail = 'tail'; var name = 'name'; try { throw new Error('abc'); } catch ({message: [head, ...tail], name}) { assertEquals('a', head); assertArrayEquals(['b', 'c'], tail); assertEquals('Error', name); } assertEquals('head', head); assertEquals('tail', tail); assertEquals('name', name);
JavaScript
var [a = 0] = []; assertEquals(0, a); var {b = 1} = {}; assertEquals(1, b); var {c = 2} = {c: 3}; assertEquals(3, c); var {d = 4} = Object.create({d: 5}); assertEquals(5, d); var {e: f = 6} = {}; assertEquals(6, f); var {g: h = 7} = {h: 8}; assertEquals(7, h); var [, , , i = 9] = [10, 11, 12]; assertEquals(9, i);...
JavaScript
function destructArray() { var a, b, c, d; [a, [b], c, d] = ['hello', [',', 'junk'], ['world']]; return { a: a, b: b, c: c, d: d }; } // ---------------------------------------------------------------------------- var result = destructArray(); assertEquals('hello', result.a); assertEquals(',',...
JavaScript
var object = { abc: 0, // Keep all the keys at length 3. def: 1 }; var expectedHeads = ['a', 'd']; var expectedTails = [['b', 'c'], ['e','f']]; var i = 0; for (var [head, ...tail] in object) { assertEquals(expectedHeads[i], head); assertArrayEquals(expectedTails[i], tail); i++; } assertEquals(2, i); { le...
JavaScript
function destructEvaluationOrder() { var a; [a, a, a] = [1, 2, 3, 4]; return a; } // ---------------------------------------------------------------------------- var result = destructEvaluationOrder(); assertEquals(3, result);
JavaScript
function destructureArguments(x, y) { [arguments[0], [arguments[1]]] = [1, [2]] return x + y; } // ---------------------------------------------------------------------------- assertEquals(3, destructureArguments(1, 2));
JavaScript
function f([a, b, ...c], d) { return [a, b, c, d]; } assertArrayEquals([1, 2, [3, 4], 5], f([1, 2, 3, 4], 5));
JavaScript
function f({a, b: {c}}, d) { return [a, c, d]; } assertArrayEquals([1, 2, 3], f({a: 1, b: {c: 2}}, 3));
JavaScript
function f(...args) { return args; } var result = f(0, ...undefined, 1); // ---------------------------------------------------------------------------- assertArrayEquals([0, 1], result);
JavaScript
// Should not compile. // Options: --spread=false [0, 1, ...[2, 3]];
JavaScript
var d = new Date(...[2011, 4, 3]); // ---------------------------------------------------------------------------- assertEquals(2011, d.getFullYear()); assertEquals(4, d.getMonth()); assertEquals(3, d.getDate());
JavaScript
class SpreadTestClass { constructor(x, y) { this.SpreadTestClass = SpreadTestClass; this.self = this; this.x = x; this.y = y; } } var object = new SpreadTestClass(...[0, 1]); // ---------------------------------------------------------------------------- assertEquals(object.x, 0); assertEquals(ob...
JavaScript
function f(...args) { return args; } var result = f(0, ...[1, 2], 3); // ---------------------------------------------------------------------------- assertArrayEquals([0, 1, 2, 3], result);
JavaScript
// ---------------------------------------------------------------------------- assertArrayEquals([0, 1], [0, ...null, 1]); assertArrayEquals([0, 1], [0, ...undefined, 1]); assertArrayEquals([0, 1], [0, ...{}, 1]); assertArrayEquals([0, 1, 2, 3], [0, ...{0: 1, 1: 2, length: 2}, 3]); assertArrayEquals([0, 'a', 'b', 'c...
JavaScript
function F(x, y, z) { this.x = x; this.y = y; this.z = z; this.self = this; this.F = F; } var object = new F(0, ...[1, 2]); // ---------------------------------------------------------------------------- assertEquals(0, object.x); assertEquals(1, object.y); assertEquals(2, object.z); assertEquals(object, o...
JavaScript
var obj = { method: function(...args) { return { self: this, args: args }; } }; var result = { obj: obj, result: obj.method(0, ...[1, 2], 3) }; // ---------------------------------------------------------------------------- assertEquals(result.obj, result.result.self); assertArrayEquals([...
JavaScript
var obj = { method: function(...args) { return { self: this, args: args }; } }; var result = { obj: obj, result: obj['meth' + 'od'](0, ...[1, 2], 3) }; // ---------------------------------------------------------------------------- assertEquals(result.obj, result.result.self); assertArray...
JavaScript
function G() {} function F(x, y, z) { var obj = new G; obj.x = x; obj.y = y; obj.z = z; obj.f = this; obj.G = G; obj.F = F; return obj; } var object = new F(0, ...[1, 2]); // ---------------------------------------------------------------------------- assertEquals(0, object.x); assertEquals(1, objec...
JavaScript
var a = []; var b = [0, ...a]; var c = [...b, ...b]; var d; var e = [0, ...d = [1, 2], 3]; var f = [0, ...[[1, 2], [3, 4]], 5]; // ---------------------------------------------------------------------------- assertArrayEquals([0], b); assertArrayEquals([0, 0], c); assertArrayEquals([1, 2], d); assertArrayEquals([0, 1...
JavaScript
// Should not compile. var object = { a() {},, };
JavaScript
// Should not compile. // Options: --propertyOptionalComma=false var object = { get x() { return 42; } set x(v) {} };
JavaScript
var object = { a() {} b() {} c() {}, get d() {} get e() {} get f() {}, set g(g) {} set h(h) {} set i(i) {}, }; // ---------------------------------------------------------------------------- assertTrue(object.hasOwnProperty('a')); assertTrue(object.hasOwnProperty('b')); assertTrue(object.hasOwnPrope...
JavaScript
// Should not compile. var object = { a: 0 b: 1 };
JavaScript
// Should not compile. var object = { a() { },, b() {} };
JavaScript
import elementGet from '@name'; { var getLog = []; var object = {}; object[elementGet] = function(index) { assertEquals(object, this); getLog.push(index); return function() { assertEquals(object, this); return index; }; }; var tmp = {}; function f() {} var re = /regexp/ a...
JavaScript
import {elementGet, elementSet, elementDelete} from '@name'; { var setLog = []; var getLog = []; var deleteLog = []; var object = {}; object[elementGet] = function(name) { assertEquals(object, this); getLog.push(name); return name; }; var tmp = {}; function f() {} var re = /regexp/; ...
JavaScript
module Name from '@name'; { function isIndex(s) { // toUint32: s >>> 0 return s == String(s >>> 0); } function ArrayLike() { // This should use a private name. Object.defineProperty(this, '_length', { value: 0, writable: true }); } ArrayLike.prototype = Object.create({}, { ...
JavaScript
function f(a = 1, b = 2) { return a + b; } assertEquals(0, f.length); assertEquals(3, f()); assertEquals(6, f(4)); assertEquals(24, f(8, 16)); function g(a, b = a) { return a + b; } assertEquals(1, g.length); assertEquals(4, g(2)); assertEquals(5, g(2, 3)); function C(obj = this) { this.obj = obj; } assertEq...
JavaScript
// Should not compile. // Error: (6, 15): ')' expected var object = { // Defautl parameters are not allowed on setters. set x(value = 42) {} }
JavaScript
function f() { return 'outer'; } { (function f() { return 'inner'; }); assertEquals('outer', f()); } assertEquals('outer', f());
JavaScript
var result; { let let_x = 'let x'; let let_l = []; for (var var_x = 1, var_y = 2, var_z = 3; var_x < 10; var_x ++) { let l_x = var_x, l_y = var_y, l_z = var_z; let_l.push( function() { return [ l_x, l_y, l_z ]; } ); } result = let_l; } // ------------------------------------------------------------...
JavaScript
for (var x = 0; x < 10; x ++) { for (var y = 0; y < 10; y ++) { let z = 'let z'; if (x == 7) { continue; } } } // ----------------------------------------------------------------------------
JavaScript
function letInClosure(n) { var l = []; for (var i = 0; i < n; i ++) { let let_i = i; if (i % 3 == 0) { continue; } l.push(function() { return let_i; }); } return l; } // ---------------------------------------------------------------------------- var result = letInClosure(10); ...
JavaScript
var a = 'var a'; { var b = 'var b'; { let c = 'let c'; { var d = 'var d'; } } } // ----------------------------------------------------------------------------
JavaScript
for (var i = 0; i < 5; i ++) { let let_x = 'let x'; switch (i) { case 0: break; case 2: break; default: break; } } // ----------------------------------------------------------------------------
JavaScript
for (var x = 0; x < 10; x ++) { let y = 'let y'; } // ----------------------------------------------------------------------------
JavaScript