v8/test/mjsunit/es6/destructuring.js
Toon Verwaest 9ac65ceb2a [parser] Validate patterns non-parenthesized in ValidatePattern
No-Tree-Checks: true
No-Try: true
Change-Id: I8b8651e499c2d862ae9f81a18af11d610214c0cd
Reviewed-on: https://chromium-review.googlesource.com/c/1350118
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57818}
2018-11-26 10:42:05 +00:00

1203 lines
31 KiB
JavaScript

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function TestObjectLiteralPattern() {
var { x : x, y : y, get, set } = { x : 1, y : 2, get: 3, set: 4 };
assertEquals(1, x);
assertEquals(2, y);
assertEquals(3, get);
assertEquals(4, set);
var {z} = { z : 3 };
assertEquals(3, z);
var sum = 0;
for (var {z} = { z : 3 }; z != 0; z--) {
sum += z;
}
assertEquals(6, sum);
var log = [];
var o = {
get x() {
log.push("x");
return 0;
},
get y() {
log.push("y");
return {
get z() { log.push("z"); return 1; }
}
}
};
var { x : x0, y : { z : z1 }, x : x1 } = o;
assertSame(0, x0);
assertSame(1, z1);
assertSame(0, x1);
assertArrayEquals(["x", "y", "z", "x"], log);
}());
(function TestObjectLiteralPatternInitializers() {
var { x : x, y : y = 2 } = { x : 1 };
assertEquals(1, x);
assertEquals(2, y);
var {z = 3} = {};
assertEquals(3, z);
var sum = 0;
for (var {z = 3} = {}; z != 0; z--) {
sum += z;
}
assertEquals(6, sum);
var log = [];
var o = {
get x() {
log.push("x");
return undefined;
},
get y() {
log.push("y");
return {
get z() { log.push("z"); return undefined; }
}
}
};
var { x : x0 = 0, y : { z : z1 = 1}, x : x1 = 0} = o;
assertSame(0, x0);
assertSame(1, z1);
assertSame(0, x1);
assertArrayEquals(["x", "y", "z", "x"], log);
}());
(function TestObjectLiteralPatternLexicalInitializers() {
'use strict';
let { x : x, y : y = 2 } = { x : 1 };
assertEquals(1, x);
assertEquals(2, y);
let {z = 3} = {};
assertEquals(3, z);
let log = [];
let o = {
get x() {
log.push("x");
return undefined;
},
get y() {
log.push("y");
return {
get z() { log.push("z"); return undefined; }
}
}
};
let { x : x0 = 0, y : { z : z1 = 1 }, x : x1 = 5} = o;
assertSame(0, x0);
assertSame(1, z1);
assertSame(5, x1);
assertArrayEquals(["x", "y", "z", "x"], log);
let sum = 0;
for (let {x = 0, z = 3} = {}; z != 0; z--) {
assertEquals(0, x);
sum += z;
}
assertEquals(6, sum);
}());
(function TestObjectLiteralPatternLexical() {
'use strict';
let { x : x, y : y } = { x : 1, y : 2 };
assertEquals(1, x);
assertEquals(2, y);
let {z} = { z : 3 };
assertEquals(3, z);
let log = [];
let o = {
get x() {
log.push("x");
return 0;
},
get y() {
log.push("y");
return {
get z() { log.push("z"); return 1; }
}
}
};
let { x : x0, y : { z : z1 }, x : x1 } = o;
assertSame(0, x0);
assertSame(1, z1);
assertSame(0, x1);
assertArrayEquals(["x", "y", "z", "x"], log);
let sum = 0;
for (let {x, z} = { x : 0, z : 3 }; z != 0; z--) {
assertEquals(0, x);
sum += z;
}
assertEquals(6, sum);
}());
(function TestObjectLiteralPatternLexicalConst() {
'use strict';
const { x : x, y : y } = { x : 1, y : 2 };
assertEquals(1, x);
assertEquals(2, y);
assertThrows(function() { x++; }, TypeError);
assertThrows(function() { y++; }, TypeError);
const {z} = { z : 3 };
assertEquals(3, z);
for (const {x, z} = { x : 0, z : 3 }; z != 3 || x != 0;) {
assertTrue(false);
}
}());
(function TestFailingMatchesSloppy() {
var {x, y} = {};
assertSame(undefined, x);
assertSame(undefined, y);
var { x : { z1 }, y2} = { x : {}, y2 : 42 }
assertSame(undefined, z1);
assertSame(42, y2);
}());
(function TestFailingMatchesStrict() {
'use strict';
var {x, y} = {};
assertSame(undefined, x);
assertSame(undefined, y);
var { x : { z1 }, y2} = { x : {}, y2 : 42 }
assertSame(undefined, z1);
assertSame(42, y2);
{
let {x1,y1} = {};
assertSame(undefined, x1);
assertSame(undefined, y1);
let { x : { z1 }, y2} = { x : {}, y2 : 42 }
assertSame(undefined, z1);
assertSame(42, y2);
}
}());
(function TestTDZInIntializers() {
'use strict';
{
let {x, y = x} = {x : 42, y : 27};
assertSame(42, x);
assertSame(27, y);
}
{
let {x, y = x + 1} = { x : 42 };
assertSame(42, x);
assertSame(43, y);
}
assertThrows(function() {
let {x = y, y} = { y : 42 };
}, ReferenceError);
{
let {x, y = eval("x+1")} = {x:42};
assertEquals(42, x);
assertEquals(43, y);
}
{
let {x, y = () => eval("x+1")} = {x:42};
assertEquals(42, x);
assertEquals(43, y());
}
{
let {x = function() {return y+1;}, y} = {y:42};
assertEquals(43, x());
assertEquals(42, y);
}
{
let {x = function() {return eval("y+1");}, y} = {y:42};
assertEquals(43, x());
assertEquals(42, y);
}
}());
(function TestSideEffectsInInitializers() {
var callCount = 0;
function f(v) { callCount++; return v; }
callCount = 0;
var { x = f(42) } = { x : 27 };
assertSame(27, x);
assertEquals(0, callCount);
callCount = 0;
var { x = f(42) } = {};
assertSame(42, x);
assertEquals(1, callCount);
}());
(function TestAssignmentExprInInitializers() {
{
let x, y;
{
let { x = y = 1 } = {};
assertSame(x, 1);
assertSame(y, 1);
}
assertSame(undefined, x);
assertSame(1, y);
}
{
let x, y;
{
let { x: x = y = 1 } = {};
assertSame(1, x);
assertSame(1, y);
}
assertSame(undefined, x);
assertSame(1, y);
}
{
let x, y;
{
let [ x = y = 1 ] = [];
assertSame(1, x);
assertSame(1, y);
}
assertSame(undefined, x);
assertSame(1, y);
}
{
let x, y;
(function({ x = y = 1 }) {}({}));
assertSame(undefined, x);
assertSame(1, y);
}
{
let x, y;
(function({ x: x = y = 1 }) {}({}));
assertSame(undefined, x);
assertSame(1, y);
}
{
let x, y;
(function([ x = y = 1 ]) {}([]));
assertSame(undefined, x);
assertSame(1, y);
}
}());
(function TestMultipleAccesses() {
assertThrows(
"'use strict';"+
"const {x,x} = {x:1};",
SyntaxError);
assertThrows(
"'use strict';"+
"let {x,x} = {x:1};",
SyntaxError);
(function() {
var {x,x = 2} = {x : 1};
assertSame(1, x);
}());
assertThrows(function () {
'use strict';
let {x = (function() { x = 2; }())} = {};
}, ReferenceError);
(function() {
'use strict';
let {x = (function() { x = 2; }())} = {x:1};
assertSame(1, x);
}());
}());
(function TestComputedNames() {
var x = 1;
var {[x]:y} = {1:2};
assertSame(2, y);
(function(){
'use strict';
let {[x]:y} = {1:2};
assertSame(2, y);
}());
var callCount = 0;
function foo(v) { callCount++; return v; }
(function() {
callCount = 0;
var {[foo("abc")]:x} = {abc:42};
assertSame(42, x);
assertEquals(1, callCount);
}());
(function() {
'use strict';
callCount = 0;
let {[foo("abc")]:x} = {abc:42};
assertSame(42, x);
assertEquals(1, callCount);
}());
(function() {
callCount = 0;
var {[foo("abc")]:x} = {};
assertSame(undefined, x);
assertEquals(1, callCount);
}());
(function() {
'use strict';
callCount = 0;
let {[foo("abc")]:x} = {};
assertSame(undefined, x);
assertEquals(1, callCount);
}());
for (val of [null, undefined]) {
callCount = 0;
assertThrows(function() {
var {[foo()]:x} = val;
}, TypeError);
assertEquals(0, callCount);
callCount = 0;
assertThrows(function() {
'use strict';
let {[foo()]:x} = val;
}, TypeError);
assertEquals(0, callCount);
}
var log = [];
var o = {
get x() { log.push("get x"); return 1; },
get y() { log.push("get y"); return 2; }
}
function f(v) { log.push("f " + v); return v; }
(function() {
log = [];
var { [f('x')]:x, [f('y')]:y } = o;
assertSame(1, x);
assertSame(2, y);
assertArrayEquals(["f x", "get x", "f y", "get y"], log);
}());
(function() {
'use strict';
log = [];
let { [f('x')]:x, [f('y')]:y } = o;
assertSame(1, x);
assertSame(2, y);
assertArrayEquals(["f x", "get x", "f y", "get y"], log);
}());
(function() {
'use strict';
log = [];
const { [f('x')]:x, [f('y')]:y } = o;
assertSame(1, x);
assertSame(2, y);
assertArrayEquals(["f x", "get x", "f y", "get y"], log);
}());
}());
(function TestExceptions() {
for (var val of [null, undefined]) {
assertThrows(function() { var {} = val; }, TypeError);
assertThrows(function() { var {x} = val; }, TypeError);
assertThrows(function() { var { x : {} } = { x : val }; }, TypeError);
assertThrows(function() { 'use strict'; let {} = val; }, TypeError);
assertThrows(function() { 'use strict'; let {x} = val; }, TypeError);
assertThrows(function() { 'use strict'; let { x : {} } = { x : val }; },
TypeError);
}
}());
(function TestArrayLiteral() {
var [a, b, c] = [1, 2, 3];
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
}());
(function TestIterators() {
var log = [];
function* f() {
log.push("1");
yield 1;
log.push("2");
yield 2;
log.push("3");
yield 3;
log.push("done");
};
(function() {
log = [];
var [a, b, c] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
var [a, b, c, d] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
var [a, , c] = f();
assertSame(1, a);
assertSame(3, c);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
var [a, , c, d] = f();
assertSame(1, a);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
// last comma is not an elision.
var [a, b,] = f();
assertSame(1, a);
assertSame(2, b);
assertArrayEquals(["1", "2"], log);
}());
(function() {
log = [];
// last comma is not an elision, but the comma before the last is.
var [a, b, ,] = f();
assertSame(1, a);
assertSame(2, b);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
var [a, ...rest] = f();
assertSame(1, a);
assertArrayEquals([2,3], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
var [a, b, c, ...rest] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertArrayEquals([], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
var [a, b, c, d, ...rest] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals([], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
}());
(function TestIteratorsLexical() {
'use strict';
var log = [];
function* f() {
log.push("1");
yield 1;
log.push("2");
yield 2;
log.push("3");
yield 3;
log.push("done");
};
(function() {
log = [];
let [a, b, c] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
let [a, b, c, d] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
let [a, , c] = f();
assertSame(1, a);
assertSame(3, c);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
let [a, , c, d] = f();
assertSame(1, a);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
// last comma is not an elision.
let [a, b,] = f();
assertSame(1, a);
assertSame(2, b);
assertArrayEquals(["1", "2"], log);
}());
(function() {
log = [];
// last comma is not an elision, but the comma before the last is.
let [a, b, ,] = f();
assertSame(1, a);
assertSame(2, b);
assertArrayEquals(["1", "2", "3"], log);
}());
(function() {
log = [];
let [a, ...rest] = f();
assertSame(1, a);
assertArrayEquals([2,3], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
let [a, b, c, ...rest] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertArrayEquals([], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
(function() {
log = [];
let [a, b, c, d, ...rest] = f();
assertSame(1, a);
assertSame(2, b);
assertSame(3, c);
assertSame(undefined, d);
assertArrayEquals([], rest);
assertArrayEquals(["1", "2", "3", "done"], log);
}());
}());
(function TestIteratorsRecursive() {
var log = [];
function* f() {
log.push("1");
yield {x : 1, y : 2};
log.push("2");
yield [42, 27, 30];
log.push("3");
yield "abc";
log.push("done");
};
(function() {
var [{x, y}, [a, b]] = f();
assertSame(1, x);
assertSame(2, y);
assertSame(42, a);
assertSame(27, b);
assertArrayEquals(["1", "2"], log);
}());
(function() {
'use strict';
log = [];
let [{x, y}, [a, b]] = f();
assertSame(1, x);
assertSame(2, y);
assertSame(42, a);
assertSame(27, b);
assertArrayEquals(["1", "2"], log);
}());
}());
(function TestForEachLexical() {
'use strict';
let a = [{x:1, y:-1}, {x:2,y:-2}, {x:3,y:-3}];
let sumX = 0;
let sumY = 0;
let fs = [];
for (let {x,y} of a) {
sumX += x;
sumY += y;
fs.push({fx : function() { return x; }, fy : function() { return y }});
}
assertSame(6, sumX);
assertSame(-6, sumY);
assertSame(3, fs.length);
for (let i = 0; i < fs.length; i++) {
let {fx,fy} = fs[i];
assertSame(i+1, fx());
assertSame(-(i+1), fy());
}
var o = { __proto__:null, 'a1':1, 'b2':2 };
let sx = '';
let sy = '';
for (let [x,y] in o) {
sx += x;
sy += y;
}
assertEquals('ab', sx);
assertEquals('12', sy);
}());
(function TestForEachVars() {
var a = [{x:1, y:-1}, {x:2,y:-2}, {x:3,y:-3}];
var sumX = 0;
var sumY = 0;
var fs = [];
for (var {x,y} of a) {
sumX += x;
sumY += y;
fs.push({fx : function() { return x; }, fy : function() { return y }});
}
assertSame(6, sumX);
assertSame(-6, sumY);
assertSame(3, fs.length);
for (var i = 0; i < fs.length; i++) {
var {fx,fy} = fs[i];
assertSame(3, fx());
assertSame(-3, fy());
}
var o = { __proto__:null, 'a1':1, 'b2':2 };
var sx = '';
var sy = '';
for (var [x,y] in o) {
sx += x;
sy += y;
}
assertEquals('ab', sx);
assertEquals('12', sy);
}());
(function TestParameters() {
function f({a, b}) { return a - b; }
assertEquals(1, f({a : 6, b : 5}));
function f1(c, {a, b}) { return c + a - b; }
assertEquals(8, f1(7, {a : 6, b : 5}));
function f2({c, d}, {a, b}) { return c - d + a - b; }
assertEquals(7, f2({c : 7, d : 1}, {a : 6, b : 5}));
function f3([{a, b}]) { return a - b; }
assertEquals(1, f3([{a : 6, b : 5}]));
var g = ({a, b}) => { return a - b; };
assertEquals(1, g({a : 6, b : 5}));
var g1 = (c, {a, b}) => { return c + a - b; };
assertEquals(8, g1(7, {a : 6, b : 5}));
var g2 = ({c, d}, {a, b}) => { return c - d + a - b; };
assertEquals(7, g2({c : 7, d : 1}, {a : 6, b : 5}));
var g3 = ([{a, b}]) => { return a - b; };
assertEquals(1, g3([{a : 6, b : 5}]));
}());
(function TestExpressionsInParameters() {
function f0(x = eval(0)) { return x }
assertEquals(0, f0());
function f1({a = eval(1)}) { return a }
assertEquals(1, f1({}));
function f2([x = eval(2)]) { return x }
assertEquals(2, f2([]));
function f3({[eval(7)]: x}) { return x }
assertEquals(3, f3({7: 3}));
})();
(function TestParameterScoping() {
var x = 1;
function f1({a = x}) { var x = 2; return a; }
assertEquals(1, f1({}));
function f2({a = x}) { function x() {}; return a; }
assertEquals(1, f2({}));
(function() {
'use strict';
function f3({a = x}) { let x = 2; return a; }
assertEquals(1, f3({}));
function f4({a = x}) { const x = 2; return a; }
assertEquals(1, f4({}));
function f5({a = x}) { function x() {}; return a; }
assertEquals(1, f5({}));
})();
function f6({a = eval("x")}) { var x; return a; }
assertEquals(1, f6({}));
(function() {
'use strict';
function f61({a = eval("x")}) { var x; return a; }
assertEquals(1, f61({}));
})();
function f62({a = eval("'use strict'; x")}) { var x; return a; }
assertEquals(1, f62({}));
function f7({a = function() { return x }}) { var x; return a(); }
assertEquals(1, f7({}));
function f8({a = () => x}) { var x; return a(); }
assertEquals(1, f8({}));
function f9({a = () => eval("x")}) { var x; return a(); }
assertEquals(1, f9({}));
(function TestInitializedWithEvalArrowStrict() {
'use strict';
function f91({a = () => eval("x")}) { var x; return a(); }
assertEquals(1, f91({}));
})();
function f92({a = () => { 'use strict'; return eval("x") }}) { var x; return a(); }
assertEquals(1, f92({}));
function f93({a = () => eval("'use strict'; x")}) { var x; return a(); }
assertEquals(1, f93({}));
var g1 = ({a = x}) => { var x = 2; return a; };
assertEquals(1, g1({}));
var g2 = ({a = x}) => { function x() {}; return a; };
assertEquals(1, g2({}));
(function() {
'use strict';
var g3 = ({a = x}) => { let x = 2; return a; };
assertEquals(1, g3({}));
var g4 = ({a = x}) => { const x = 2; return a; };
assertEquals(1, g4({}));
var g5 = ({a = x}) => { function x() {}; return a; };
assertEquals(1, g5({}));
})();
var g6 = ({a = eval("x")}) => { var x; return a; };
assertEquals(1, g6({}));
(function() {
'use strict';
var g61 = ({a = eval("x")}) => { var x; return a; };
assertEquals(1, g61({}));
})();
var g62 = ({a = eval("'use strict'; x")}) => { var x; return a; };
assertEquals(1, g62({}));
var g7 = ({a = function() { return x }}) => { var x; return a(); };
assertEquals(1, g7({}));
var g8 = ({a = () => x}) => { var x; return a(); };
assertEquals(1, g8({}));
var g9 = ({a = () => eval("x")}) => { var x; return a(); };
assertEquals(1, g9({}));
(function() {
'use strict';
var g91 = ({a = () => eval("x")}) => { var x; return a(); };
assertEquals(1, g91({}));
var g92 = ({a = () => { return eval("x") }}) => { var x; return a(); };
assertEquals(1, g92({}));
})();
var g93 = ({a = () => eval("'use strict'; x")}) => { var x; return a(); };
assertEquals(1, g93({}));
var f11 = function f({x = f}) { var f; return x; }
assertSame(f11, f11({}));
var f12 = function f({x = f}) { function f() {}; return x; }
assertSame(f12, f12({}));
(function() {
'use strict';
var f13 = function f({x = f}) { let f; return x; }
assertSame(f13, f13({}));
var f14 = function f({x = f}) { const f = 0; return x; }
assertSame(f14, f14({}));
var f15 = function f({x = f}) { function f() {}; return x; }
assertSame(f15, f15({}));
})();
var f16 = function f({f = 7, x = f}) { return x; }
assertSame(7, f16({}));
var y = 'a';
function f20({[y]: x}) { var y = 'b'; return x; }
assertEquals(1, f20({a: 1, b: 2}));
function f21({[eval('y')]: x}) { var y = 'b'; return x; }
assertEquals(1, f21({a: 1, b: 2}));
var g20 = ({[y]: x}) => { var y = 'b'; return x; };
assertEquals(1, g20({a: 1, b: 2}));
var g21 = ({[eval('y')]: x}) => { var y = 'b'; return x; };
assertEquals(1, g21({a: 1, b: 2}));
})();
(function TestParameterDestructuringTDZ() {
function f1({a = x}, x) { return a }
assertThrows(() => f1({}, 4), ReferenceError);
assertEquals(4, f1({a: 4}, 5));
function f2({a = eval("x")}, x) { return a }
assertThrows(() => f2({}, 4), ReferenceError);
assertEquals(4, f2({a: 4}, 5));
(function() {
'use strict';
function f3({a = eval("x")}, x) { return a }
assertThrows(() => f3({}, 4), ReferenceError);
assertEquals(4, f3({a: 4}, 5));
})();
function f4({a = eval("'use strict'; x")}, x) { return a }
assertThrows(() => f4({}, 4), ReferenceError);
assertEquals(4, f4({a: 4}, 5));
function f5({a = () => x}, x) { return a() }
assertEquals(4, f5({a: () => 4}, 5));
function f6({a = () => eval("x")}, x) { return a() }
assertEquals(4, f6({a: () => 4}, 5));
(function() {
'use strict';
function f7({a = () => eval("x")}, x) { return a() }
assertEquals(4, f7({a: () => 4}, 5));
})();
function f8({a = () => eval("'use strict'; x")}, x) { return a() }
assertEquals(4, f8({a: () => 4}, 5));
function f11({a = b}, {b}) { return a }
assertThrows(() => f11({}, {b: 4}), ReferenceError);
assertEquals(4, f11({a: 4}, {b: 5}));
function f12({a = eval("b")}, {b}) { return a }
assertThrows(() => f12({}, {b: 4}), ReferenceError);
assertEquals(4, f12({a: 4}, {b: 5}));
(function() {
'use strict';
function f13({a = eval("b")}, {b}) { return a }
assertThrows(() => f13({}, {b: 4}), ReferenceError);
assertEquals(4, f13({a: 4}, {b: 5}));
})();
function f14({a = eval("'use strict'; b")}, {b}) { return a }
assertThrows(() => f14({}, {b: 4}), ReferenceError);
assertEquals(4, f14({a: 4}, {b: 5}));
function f15({a = () => b}, {b}) { return a() }
assertEquals(4, f15({a: () => 4}, {b: 5}));
function f16({a = () => eval("b")}, {b}) { return a() }
assertEquals(4, f16({a: () => 4}, {b: 5}));
(function() {
'use strict';
function f17({a = () => eval("b")}, {b}) { return a() }
assertEquals(4, f17({a: () => 4}, {b: 5}));
})();
function f18({a = () => eval("'use strict'; b")}, {b}) { return a() }
assertEquals(4, f18({a: () => 4}, {b: 5}));
// TODO(caitp): TDZ for rest parameters is not working yet.
// function f30({x = a}, ...a) { return x[0] }
// assertThrows(() => f30({}), ReferenceError);
// assertEquals(4, f30({a: [4]}, 5));
// function f31({x = eval("a")}, ...a) { return x[0] }
// assertThrows(() => f31({}), ReferenceError);
// assertEquals(4, f31({a: [4]}, 5));
// function f32({x = eval("a")}, ...a) { 'use strict'; return x[0] }
// assertThrows(() => f32({}), ReferenceError);
// assertEquals(4, f32({a: [4]}, 5));
// function f33({x = eval("'use strict'; a")}, ...a) { return x[0] }
// assertThrows(() => f33({}), ReferenceError);
// assertEquals(4, f33({a: [4]}, 5));
function f34({x = function() { return a }}, ...a) { return x()[0] }
assertEquals(4, f34({}, 4));
function f35({x = () => a}, ...a) { return x()[0] }
assertEquals(4, f35({}, 4));
function f36({x = () => eval("a")}, ...a) { return x()[0] }
assertEquals(4, f36({}, 4));
(function() {
'use strict';
function f37({x = () => eval("a")}, ...a) { return x()[0] }
assertEquals(4, f37({}, 4));
})();
function f38({x = () => { 'use strict'; return eval("a") }}, ...a) { return x()[0] }
assertEquals(4, f38({}, 4));
function f39({x = () => eval("'use strict'; a")}, ...a) { return x()[0] }
assertEquals(4, f39({}, 4));
// var g30 = ({x = a}, ...a) => {};
// assertThrows(() => g30({}), ReferenceError);
// var g31 = ({x = eval("a")}, ...a) => {};
// assertThrows(() => g31({}), ReferenceError);
// var g32 = ({x = eval("a")}, ...a) => { 'use strict'; };
// assertThrows(() => g32({}), ReferenceError);
// var g33 = ({x = eval("'use strict'; a")}, ...a) => {};
// assertThrows(() => g33({}), ReferenceError);
var g34 = ({x = function() { return a }}, ...a) => { return x()[0] };
assertEquals(4, g34({}, 4));
var g35 = ({x = () => a}, ...a) => { return x()[0] };
assertEquals(4, g35({}, 4));
})();
(function TestDuplicatesInParameters() {
assertThrows("'use strict';function f(x,x){}", SyntaxError);
assertThrows("'use strict';function f({x,x}){}", SyntaxError);
assertThrows("'use strict';function f(x, {x}){}", SyntaxError);
assertThrows("'use strict';var f = (x,x) => {};", SyntaxError);
assertThrows("'use strict';var f = ({x,x}) => {};", SyntaxError);
assertThrows("'use strict';var f = (x, {x}) => {};", SyntaxError);
function ok1(x) { var x; return x; };
assertEquals(1, ok1(1));
function ok2(x) { 'use strict'; { let x = 2; return x; } };
assertEquals(2, ok2(1));
}());
(function TestShadowingOfParameters() {
function f1({x}) { var x = 2; return x }
assertEquals(2, f1({x: 1}));
function f2({x}) { { var x = 2; } return x; }
assertEquals(2, f2({x: 1}));
function f3({x}) { var y = x; var x = 2; return y; }
assertEquals(1, f3({x: 1}));
function f4({x}) { { var y = x; var x = 2; } return y; }
assertEquals(1, f4({x: 1}));
function f5({x}, g = () => x) { var x = 2; return g(); }
assertEquals(1, f5({x: 1}));
function f6({x}, g = () => x) { { var x = 2; } return g(); }
assertEquals(1, f6({x: 1}));
function f7({x}) { var g = () => x; var x = 2; return g(); }
assertEquals(2, f7({x: 1}));
function f8({x}) { { var g = () => x; var x = 2; } return g(); }
assertEquals(2, f8({x: 1}));
function f9({x}, g = () => eval("x")) { var x = 2; return g(); }
assertEquals(1, f9({x: 1}));
function f10({x}, y) { var y; return y }
assertEquals(2, f10({x: 6}, 2));
function f11({x}, y) { var z = y; var y = 2; return z; }
assertEquals(1, f11({x: 6}, 1));
function f12(y, g = () => y) { var y = 2; return g(); }
assertEquals(1, f12(1));
function f13({x}, y, [z], v) { var x, y, z; return x*y*z*v }
assertEquals(210, f13({x: 2}, 3, [5], 7));
function f20({x}) { function x() { return 2 }; return x(); }
assertEquals(2, f20({x: 1}));
// Annex B 3.3 function hoisting is blocked by the conflicting x declaration
function f21({x}) { { function x() { return 2 } } return x; }
assertEquals(1, f21({x: 1}));
var g1 = ({x}) => { var x = 2; return x };
assertEquals(2, g1({x: 1}));
var g2 = ({x}) => { { var x = 2; } return x; };
assertEquals(2, g2({x: 1}));
var g3 = ({x}) => { var y = x; var x = 2; return y; };
assertEquals(1, g3({x: 1}));
var g4 = ({x}) => { { var y = x; var x = 2; } return y; };
assertEquals(1, g4({x: 1}));
var g5 = ({x}, g = () => x) => { var x = 2; return g(); };
assertEquals(1, g5({x: 1}));
var g6 = ({x}, g = () => x) => { { var x = 2; } return g(); };
assertEquals(1, g6({x: 1}));
var g7 = ({x}) => { var g = () => x; var x = 2; return g(); };
assertEquals(2, g7({x: 1}));
var g8 = ({x}) => { { var g = () => x; var x = 2; } return g(); };
assertEquals(2, g8({x: 1}));
var g9 = ({x}, g = () => eval("x")) => { var x = 2; return g(); };
assertEquals(1, g9({x: 1}));
var g10 = ({x}, y) => { var y; return y };
assertEquals(2, g10({x: 6}, 2));
var g11 = ({x}, y) => { var z = y; var y = 2; return z; };
assertEquals(1, g11({x: 6}, 1));
var g12 = (y, g = () => y) => { var y = 2; return g(); };
assertEquals(1, g12(1));
var g13 = ({x}, y, [z], v) => { var x, y, z; return x*y*z*v };
assertEquals(210, g13({x: 2}, 3, [5], 7));
var g20 = ({x}) => { function x() { return 2 }; return x(); }
assertEquals(2, g20({x: 1}));
var g21 = ({x}) => { { function x() { return 2 } } return x(); }
assertThrows(() => g21({x: 1}), TypeError);
// These errors are not recognized in lazy parsing; see mjsunit/bugs/bug-2728.js
assertThrows("'use strict'; (function f(x) { let x = 0; })()", SyntaxError);
assertThrows("'use strict'; (function f({x}) { let x = 0; })()", SyntaxError);
assertThrows("'use strict'; (function f(x) { const x = 0; })()", SyntaxError);
assertThrows("'use strict'; (function f({x}) { const x = 0; })()", SyntaxError);
assertThrows("'use strict'; let g = (x) => { let x = 0; }", SyntaxError);
assertThrows("'use strict'; let g = ({x}) => { let x = 0; }", SyntaxError);
assertThrows("'use strict'; let g = (x) => { const x = 0; }", SyntaxError);
assertThrows("'use strict'; let g = ({x}) => { const x = 0; }", SyntaxError);
}());
(function TestArgumentsForNonSimpleParameters() {
function f1({}, x) { arguments[1] = 0; return x }
assertEquals(6, f1({}, 6));
function f2({}, x) { x = 2; return arguments[1] }
assertEquals(7, f2({}, 7));
function f3(x, {}) { arguments[0] = 0; return x }
assertEquals(6, f3(6, {}));
function f4(x, {}) { x = 2; return arguments[0] }
assertEquals(7, f4(7, {}));
function f5(x, ...a) { arguments[0] = 0; return x }
assertEquals(6, f5(6, {}));
function f6(x, ...a) { x = 2; return arguments[0] }
assertEquals(6, f6(6, {}));
function f7({a: x}) { x = 2; return arguments[0].a }
assertEquals(5, f7({a: 5}));
function f8(x, ...a) { a = []; return arguments[1] }
assertEquals(6, f8(5, 6));
}());
(function TestForInOfTDZ() {
assertThrows("'use strict'; let x = {}; for (let [x, y] of [x]);", ReferenceError);
assertThrows("'use strict'; let x = {}; for (let [y, x] of [x]);", ReferenceError);
assertThrows("'use strict'; let x = {}; for (let [x, y] in {x});", ReferenceError);
assertThrows("'use strict'; let x = {}; for (let [y, x] in {x});", ReferenceError);
}());
(function TestFunctionLength() {
assertEquals(1, (function({}) {}).length);
assertEquals(1, (function([]) {}).length);
assertEquals(1, (function({x}) {}).length);
assertEquals(1, (function({}, ...a) {}).length);
assertEquals(1, (function({x}, {y} = {}) {}).length);
assertEquals(1, (function({x}, {y} = {}, ...a) {}).length);
assertEquals(2, (function(x, {y}, {z} = {}) {}).length);
assertEquals(2, (function({x}, {}, {z} = {}, ...a) {}).length);
assertEquals(1, (function(x, {y} = {}, {z}) {}).length);
assertEquals(1, (function({x}, {y} = {}, {z}, ...a) {}).length);
assertEquals(1, (function(x, {y} = {}, {z}, {v} = {}) {}).length);
assertEquals(1, (function({x}, {y} = {}, {z}, {v} = {}, ...a) {}).length);
})();
(function TestDirectiveThrows() {
"use strict";
assertThrows(function(){ eval("function({}){'use strict';}") }, SyntaxError);
assertThrows(function(){ eval("({}) => {'use strict';}") }, SyntaxError);
assertThrows(
function(){ eval("(class{foo({}) {'use strict';}});") }, SyntaxError);
assertThrows(
function(){ eval("function(a, {}){'use strict';}") }, SyntaxError);
assertThrows(function(){ eval("(a, {}) => {'use strict';}") }, SyntaxError);
assertThrows(
function(){ eval("(class{foo(a, {}) {'use strict';}});") }, SyntaxError);
})();
(function TestLegacyConstDestructuringInForLoop() {
var result;
for (const {foo} of [{foo: 1}]) { result = foo; }
assertEquals(1, result);
})();
(function TestCatch() {
"use strict";
// For testing proper scoping.
var foo = "hello", bar = "world", baz = 42;
try {
throw {foo: 1, bar: 2};
} catch ({foo, bar, baz = 3}) {
assertEquals(1, foo);
assertEquals(2, bar);
assertEquals(3, baz);
}
try {
throw [1, 2, 3];
} catch ([foo, ...bar]) {
assertEquals(1, foo);
assertEquals([2, 3], bar);
}
assertEquals("hello", foo);
assertEquals("world", bar);
assertEquals(42, baz);
assertEquals(undefined, eval('try {throw {foo: 1, bar: 2}} catch({foo}) {}'));
assertEquals(undefined, eval('try {throw [1, 2, 3]} catch([x]) {}'));
})();
// Property access as declaration target.
assertThrows("let [o.x=1]=[]", SyntaxError);
assertThrows("let {x:o.f=1}={x:1}", SyntaxError);
assertThrows("(o.f=1)=>0", SyntaxError);
// Invalidly parenthesized declaration targets.
assertThrows("for (({x}) of [{x:1}]) {}", SyntaxError);
assertThrows("for (var ({x}) of [{x:1}]) {}", SyntaxError);
assertThrows("for await (({x}) of [{x:1}]) {}", SyntaxError);