use swc_common::{chain, Mark}; use swc_ecma_parser::Syntax; use swc_ecma_transforms_base::resolver; use swc_ecma_transforms_compat::{ es2015, es2015::{ block_scoping, destructuring::{destructuring, Config}, parameters, spread, }, es2018::object_rest_spread, }; use swc_ecma_transforms_testing::{test, test_exec}; use swc_ecma_visit::Fold; fn syntax() -> Syntax { Default::default() } fn tr() -> impl Fold { chain!( resolver(Mark::new(), Mark::new(), false), destructuring(Config { loose: true }) ) } test!( syntax(), |_| tr(), issue_2819, r#"const [first, , third] = ["red", "yellow", "green"]"#, r#"const first = "red", third = "green";"#, ok_if_code_eq ); test!( syntax(), |_| tr(), issue_2821, r#"const [x, y, ...z] = [1];"#, r#"const _ref = [ 1 ], x = _ref[0], y = _ref[1], z = _ref.slice(2)"#, ok_if_code_eq ); test!( syntax(), |_| destructuring(Config { loose: false }), need_to_array, r#"const [x, y, ...z] = o;"#, r#"const _o = _toArray(o), x = _o[0], y = _o[1], z = _o.slice(2);"#, ok_if_code_eq ); test!( syntax(), |_| destructuring(Config { loose: true }), need_to_array_loose, r#"const [x, y, ...z] = o;"#, r#"const x = o[0], y = o[1], z = o.slice(2);"#, ok_if_code_eq ); test!( syntax(), |_| destructuring(Config { loose: false }), issue_2841, r#"function foo(a,b) { [a,b,...restParam] = arguments; }"#, r#"function foo(a, b) { var ref; ref = Array.prototype.slice.call(arguments), a = ref[0], b = ref[1], restParam = ref.slice(2), ref; }"#, ok_if_code_eq ); test!( syntax(), |_| destructuring(Config { loose: true }), issue_2841_loose, r#"function foo(a,b) { [a,b,...restParam] = arguments; }"#, r#"function foo(a, b) { var ref; ref = arguments, a = ref[0], b = ref[1], restParam = ref.slice(2), ref; }"#, ok_if_code_eq ); test!( syntax(), |_| tr(), issue_169, "export class Foo { func(a, b = Date.now()) { return {a}; } }", "export class Foo{ func(a, ref) { let b = ref === void 0 ? Date.now() : ref; return { a }; } } " ); test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, issue_1948, " const fn2 = (arg1, {opt1, opt2}, arg2, {opt3, opt4}, ...arg3) => { console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); }; function fn3(arg1, {opt1, opt2}, arg2, {opt3, opt4}, ...arg3) { console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); }; class cls { fn4(arg1, {opt1, opt2}, arg2, {opt3, opt4}, ...arg3) { console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); } fn5(arg1, arg2) { console.log(arg1, arg2); } }", " var fn2 = function(arg1, param, arg2, param1) { var opt1 = param.opt1, opt2 = param.opt2, opt3 = param1.opt3, opt4 = param1.opt4; for(var _len = arguments.length, arg3 = new Array(_len > 4 ? _len - 4 : 0), _key = 4; _key \ < _len; _key++){ arg3[_key - 4] = arguments[_key]; } console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); }; function fn3(arg1, param, arg2, param1) { var opt1 = param.opt1, opt2 = param.opt2, opt3 = param1.opt3, opt4 = param1.opt4; for(var _len = arguments.length, arg3 = new Array(_len > 4 ? _len - 4 : 0), _key = 4; _key \ < _len; _key++){ arg3[_key - 4] = arguments[_key]; } console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); } ; class cls { fn4(arg1, param, arg2, param1) { var opt1 = param.opt1, opt2 = param.opt2, opt3 = param1.opt3, opt4 = param1.opt4; for(var _len = arguments.length, arg3 = new Array(_len > 4 ? _len - 4 : 0), _key = 4; \ _key < _len; _key++){ arg3[_key - 4] = arguments[_key]; } console.log(arg1, opt1, opt2, arg2, opt3, opt4, arg3); } fn5(arg1, arg2) { console.log(arg1, arg2); } } " ); test!( syntax(), |_| tr(), issue_260_01, "[code = 1] = []", "var ref, ref1; ref = [], ref1 = ref[0], code = ref1 === void 0 ? 1 : ref1, ref;" ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding, "[code = 1] = [1]", " var ref; ref = 1, code = ref === void 0 ? 1 : ref; " ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_2, "[foo = 1, bar = 2] = [3];", " var ref, ref1, ref2; ref = [3], ref1 = ref[0], foo = ref1 === void 0 ? 1 : ref1, ref2 = ref[1], bar = ref2 === void 0 ? 2 : ref2, ref; " ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_3, "[foo = 1, bar = 2] = [3, 4];", " var ref, ref1; ref = 3, foo = ref === void 0 ? 1 : ref, ref1 = 4, bar = ref1 === void 0 ? 2 : ref1; " ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_4, "const [foo = 1] = [2];", "const tmp = 2, foo = tmp === void 0 ? 1 : tmp;" ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_5, "const [foo = 1, bar] = [2, 3];", " const tmp = 2, foo = tmp === void 0 ? 1 : tmp, bar = 3; " ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_6, "const [foo = 1] = [];", " const _ref = [], tmp = _ref[0], foo = tmp === void 0 ? 1 : tmp; " ); test!( syntax(), |_| tr(), array_pat_assign_prop_binding_7, "const [foo = 1] = [1, 2];", " const _ref = [1, 2], tmp = _ref[0], foo = tmp === void 0 ? 1 : tmp; " ); test!( syntax(), |_| tr(), issue_260_02, "[code = 1, ...rest] = [];", " var ref, ref1; ref = [], ref1 = ref[0], code = ref1 === void 0 ? 1 : ref1, rest = ref.slice(1), ref; ", ok_if_code_eq ); test!( syntax(), |_| tr(), object_pat_assign_prop, "({code = 1} = {})", "var ref, ref1; ref = {}, ref1 = ref.code, code = ref1 === void 0 ? 1 : ref1, ref;" ); test!( syntax(), |_| tr(), object_pat_assign_prop_2, "const {code = 1} = {}", " const _ref = {}, _ref_code = _ref.code, code = _ref_code === void 0 ? 1 : _ref_code; " ); test!( syntax(), |_| tr(), object_pat_assign_prop_binding, "({foo: bar = 1} = {})", " var ref, ref1; ref = {}, ref1 = ref.foo, bar = ref1 === void 0 ? 1 : ref1, ref; " ); test!( syntax(), |_| tr(), object_pat_assign_prop_binding_2, "const {foo: bar = 1} = {}", " const _ref = {}, tmp = _ref.foo, bar = tmp === void 0 ? 1 : tmp; " ); test_exec!( syntax(), |_| tr(), object_pat_assign_prop_binding_3, r#" let foo = 1; let bar = 2; let x; let y; ({ [++foo]: x = "c", [++bar]: y = "d" } = { 2: "a" }); expect(foo).toBe(2); expect(bar).toBe(3); expect(x).toBe("a"); expect(y).toBe("d"); "# ); test!( syntax(), |_| tr(), object_pat_assign_prop_binding_isseu_2850, "const obj = { foo = 123, bar: x = 123 } = { foo: 24, bar: 45 };", " var ref, ref1, ref2; const obj =( ref = { foo: 24, bar: 45 }, ref1 = ref.foo, foo = ref1 === void 0 ? 123 : ref1, ref2 = ref.bar, x = ref2 === void 0 ? 123 : ref2, ref ); " ); test_exec!( syntax(), |_| tr(), object_pat_assign_prop_binding_isseu_2850_exec, r#" const obj = { foo = 123, bar: x = 123 } = { foo: 24, bar: 45 }; expect(obj).toEqual({ foo: 24, bar: 45 }); expect(foo).toBe(24); expect(x).toBe(45); "# ); test!( syntax(), |_| tr(), obj_assign_pat, r#"let { a = 1 } = foo"#, r#"let _foo_a = foo.a, a = _foo_a === void 0 ? 1 : _foo_a;"# ); test!( syntax(), |_| tr(), obj_assign_expr, r#"let a; [{ a = 1 }] = foo"#, r#"let a; var ref, ref1, ref2; ref = foo, ref1 = ref[0], ref2 = ref1.a, a = ref2 === void 0 ? 1 : ref2, ref1, ref;"# ); test!( syntax(), |_| tr(), array1, r#"var [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];"#, r#"var a = "hello", _ref = [", ", "junk"], b = _ref[0], c = "world";"# ); test!( syntax(), |_| tr(), array2, r#"[a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];"#, r#" var ref, ref1; a = "hello", ref = [", ", "junk"], b = ref[0], ref, ref1 = ["world"], c = ref1[0], ref1; "# ); test!( syntax(), |_| tr(), assign_expr_completion_record, r#"var x, y; [x, y] = [1, 2];"#, r#"var x, y; x = 1, y = 2"# ); test!( syntax(), |_| tr(), assign_expr_pat, r#"var z = {}; var { x: { y } = {} } = z;"#, r#"var z = { }; var tmp = z.x, y = (tmp === void 0 ? {} : tmp).y;"# ); test!( syntax(), |_| tr(), assign_expr, r#"console.log([x] = [123]);"#, r#"var ref; console.log((ref = [123], x = ref[0], ref));"# ); test_exec!( syntax(), |_| destructuring(Config { loose: true }), chained, r#"var a, b, c, d; ({ a, b } = ({ c, d } = { a: 1, b: 2, c: 3, d: 4})); expect(a).toBe(1); expect(b).toBe(2); expect(c).toBe(3); expect(d).toBe(4);"# ); test!( syntax(), |_| tr(), empty, r#"var [, a, [b], [c], d] = ["foo", "hello", [", ", "junk"], ["world"]];"#, r#"var _ref = ["foo", "hello", [", ", "junk"], ["world"]], a = _ref[1], _ref_ = _ref[2], b = _ref_[0], _ref_1 = _ref[3], c = _ref_1[0], d = _ref[4]; "# ); test!( ignore, syntax(), |_| tr(), es7_object_rest_builtins, r#"var z = {}; var { ...x } = z; var { x, ...y } = z; var { [x]: x, ...y } = z; (function({ x, ...y }) { }); ({ x, y, ...z } = o);"#, r#"var z = {}; var _z = z, x = Object.assign({}, _z); var _z2 = z, x = _z2.x, y = _objectWithoutProperties(_z2, ["x"]); var _z3 = z, x = _z3[x], y = _objectWithoutProperties(_z3, [x].map(_toPropertyKey)); (function (_ref) { var x = _ref.x, y = _objectWithoutProperties(_ref, ["x"]); }); var _o = o; x = _o.x; y = _o.y; z = _objectWithoutProperties(_o, ["x", "y"]); _o;"# ); test!( ignore, syntax(), |_| tr(), es7_object_rest, r#"var z = {}; var { ...x } = z; var { x, ...y } = z; var { [x]: x, ...y } = z; (function({ x, ...y }) { }); ({ x, y, ...z } = o);"#, r#"var z = {}; var _z = z, x = _extends({}, _z); var _z2 = z, x = _z2.x, y = _objectWithoutProperties(_z2, ["x"]); var _z3 = z, x = _z3[x], y = _objectWithoutProperties(_z3, [x].map(_toPropertyKey)); (function (_ref) { var x = _ref.x, y = _objectWithoutProperties(_ref, ["x"]); }); var _o = o; x = _o.x; y = _o.y; z = _objectWithoutProperties(_o, ["x", "y"]); _o;"# ); test!( syntax(), |_| tr(), export_variable_issue_2858_1, r#"export const { a: a2, b: b2 } = { a: 1, b: 2 };"#, r#" var _ref = { a: 1, b: 2, }; export const a2 = _ref.a, b2 = _ref.b; "# ); test!( syntax(), |_| tr(), export_variable_issue_2858_2, r#"export const { a: b } = { a: 1 }"#, r#" var _ref = { a: 1 }; export const b = _ref.a; "# ); test!( syntax(), |_| tr(), export_variable_issue_2858_3, r#" export const { a: a1, b: b1, b: { c: c1 }, } = { a: 1, b: { c: 1 } }; "#, r#" var _ref = { a: 1, b: { c: 1, }, }, _ref_b = _ref.b; export const a1 = _ref.a, b1 = _ref.b, c1 = _ref_b.c; "# ); test!( ignore, syntax(), |_| tr(), export_variable, r#"export let {a, b, c: {d, e: {f = 4}}} = {};"#, r#" var _ref = {}, a = _ref.a, b = _ref.b, _ref$c = _ref.c, d = _ref$c.d, _ref$c$e$f = _ref$c.e.f, f = _ref$c$e$f === void 0 ? 4 : _ref$c$e$f; export { a, b, d, f };"# ); test!( syntax(), |_| tr(), for_in, r#"for (var [name, value] in obj) { print("Name: " + name + ", Value: " + value); }"#, r#"for(var ref in obj){ let name = ref[0], value = ref[1]; print("Name: " + name + ", Value: " + value); } "# ); test!( syntax(), |_| tr(), for_let, r#"for (let [ i, n ] = range; ; ) {}"#, r#"for(let i = range[0], n = range[1];;){}"# ); test!( syntax(), |_| tr(), for_of, r#"for (var [ name, before, after ] of test.expectation.registers) { }"#, r#"for(var ref of test.expectation.registers){ let name = ref[0], before = ref[1], after = ref[2]; }"# ); test_exec!( ignore, syntax(), |_| destructuring(Config { loose: true }), fn_key_with_obj_rest_spread, r#"const { [(() => 1)()]: a, ...rest } = { 1: "a" }; expect(a).toBe("a"); expect(rest).toEqual({});"# ); test!( syntax(), |_| tr(), babel_issue_3081, r#"let list = [1, 2, 3, 4]; for (let i = 0, { length } = list; i < length; i++) { list[i]; }"#, r#"let list = [1, 2, 3, 4]; for(let i = 0, length = list.length; i < length; i++){ list[i]; } "# ); test_exec!( syntax(), |_| destructuring(Config { loose: true }), babel_issue_5090, r#"const assign = function([...arr], index, value) { arr[index] = value; return arr; } const arr = [1, 2, 3]; assign(arr, 1, 42); expect(arr).toEqual([1, 2, 3]);"# ); test!( syntax(), |_| tr(), babel_issue_5628, r#" (function () { let q; let w; let e; if (true) [q, w, e] = [1, 2, 3].map(()=>123); })();"#, r#"(function() { let q; let w; let e; var ref; if (true) ref = [1, 2, 3].map(()=>123), q = ref[0], w = ref[1], e = ref[2], ref; })();"# ); test!( syntax(), |_| tr(), babel_issue_5744, r#"if (true) [a, b] = [b, a];"#, r#"var ref; if (true) ref = [b, a], a = ref[0], b = ref[1], ref;"# ); test!( ignore, syntax(), |_| tr(), babel_issue_6373, r#"import { NestedObjects } from "./some-module" const { Foo, Bar } = NestedObjects"#, r#""use strict"; var _someModule = require("./some-module"); const Foo = _someModule.NestedObjects.Foo, Bar = _someModule.NestedObjects.Bar;"# ); test!( syntax(), |_| tr(), known_array, r#"var z = []; var [x, ...y] = z;"#, r#"var z = []; var x = z[0], y = z.slice(1);"# ); test!( syntax(), |_| tr(), member_expr, r#"[foo.foo, foo.bar] = [1, 2];"#, r#"foo.foo = 1, foo.bar = 2;"# ); test!( syntax(), |_| tr(), multiple, r#"var coords = [1, 2]; var { x, y } = coords, foo = "bar";"#, r#"var coords = [1, 2]; var x = coords.x, y = coords.y, foo = "bar";"# ); test_exec!( ignore, syntax(), |_| destructuring(Config { loose: true }), number_key_with_object_spread, r#"const foo = { 1: "a", 2: "b", 3: "c", }; const { [1]: bar, ...rest } = foo; expect(bar).toBe("a"); expect(rest).toEqual({ 2: "b", 3: "c" });"# ); test_exec!( ignore, syntax(), |_| destructuring(Config { loose: true }), spread_generator, r#"function* f() { for (var i = 0; i < 3; i++) { yield i; } } var [...xs] = f(); expect(xs).toEqual([0, 1, 2]);"# ); test!( syntax(), |_| tr(), spread_test, r#"function isSorted([x, y, ...wow]) { if (!zs.length) return true if (y > x) return isSorted(zs) return false }"#, r#"function isSorted(ref) { let x = ref[0], y = ref[1], wow = ref.slice(2); if (!zs.length) return true; if (y > x) return isSorted(zs); return false; }"# ); test!( syntax(), |_| tr(), issue_311, "const Foo = 'foo'; const bar = { [Foo]: { qux: 'baz' } }; const { [Foo]: { qux } } = bar;", " const Foo = 'foo'; const bar = { [Foo]: { qux: 'baz' } }; const qux = bar[Foo].qux;" ); test!( syntax(), |_| tr(), issue_317, "export const [ A, B, C ] = [1,2,3]; export const [ E, D, F ] = [4,5,6];", " export const A = 1, B = 2, C = 3; export const E = 4, D = 5, F = 6;" ); test!( syntax(), |_| tr(), issue_336, "const { 'foo-bar': fooBar } = baz;", "const fooBar = baz['foo-bar'];" ); test!( syntax(), |_| tr(), issue_404_1, "function foo(bar) { const { foo } = bar; return foo; }", " function foo(bar) { const foo = bar.foo; return foo; }" ); test!( syntax(), |t| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), es2015( unresolved_mark, Some(t.comments.clone()), Default::default() ), ) }, issue_404_2, "function foo(bar) { const { foo } = bar; return foo; }", " function foo(bar) { var foo = bar.foo; return foo; }" ); test!( syntax(), |_| tr(), issue_404_3, "function foo(bar) { var { foo: foo1 } = bar; return foo1; }", " function foo(bar) { var foo1 = bar.foo; return foo1; } " ); // destructuring_function_key_with_object_rest_spread test_exec!( syntax(), |_| chain!( object_rest_spread(Default::default()), destructuring(Default::default()) ), destructuring_function_key_with_object_rest_spread_exec, r#" const { [(() => 1)()]: a, ...rest } = { 1: "a" }; expect(a).toBe("a"); expect(rest).toEqual({}); "# ); // regression_8528 test!( syntax(), |_| destructuring(Default::default()), regression_8528, r#" function isBetween(x, a, b) { if (a > b) [a, b] = [b, a]; return x > a && x < b; } "#, r#" function isBetween(x, a, b) { var ref; if (a > b) ref = [b, a], a = ref[0], b = ref[1], ref; return x > a && x < b; } "# ); // destructuring_for_of test!( syntax(), |_| chain!( spread(Default::default()), destructuring(Default::default()), block_scoping(Mark::new()), object_rest_spread(Default::default()), ), destructuring_for_of, r#" for (var [ name, before, after ] of test.expectation.registers) { } for ([ name, before, after ] of test.expectation.registers) { } "#, r#" for (var _$ref of test.expectation.registers){ var _ref = _slicedToArray(_$ref, 3), name = _ref[0], before = _ref[1], after = _ref[2]; } var _$ref1; for (ref of test.expectation.registers){ _$ref1 = _slicedToArray(ref, 3), name = _$ref1[0], before = _$ref1[1], after = _$ref1[2], _$ref1; } "# ); // destructuring_object_basic test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_object_basic, r#" var coords = [1, 2]; var { x, y } = coords; "#, r#" var coords = [1, 2]; var x = coords.x, y = coords.y; "# ); // destructuring_assignment_arrow_function_block test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_assignment_arrow_function_block, r#" () => { [a, b] = [1, 2] } "#, r#" () => { a = 1, b = 2; }; "# ); // destructuring_non_iterable test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_non_iterable_exec, r#" expect( () => { var [foo, bar] = undefined; }).toThrow(); expect( () => { var foo = [ ...undefined ]; }).toThrow(); "# ); // destructuring_empty_object_pattern test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_empty_object_pattern_exec, r#" expect(function () { var {} = null; }).toThrow("Cannot destructure null"); "# ); // destructuring_chained test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_chained_exec, r#" var a, b, c, d; ({ a, b } = ({ c, d } = { a: 1, b: 2, c: 3, d: 4})); expect(a).toBe(1); expect(b).toBe(2); expect(c).toBe(3); expect(d).toBe(4); "# ); // destructuring_object_rest_impure_computed_keys test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), ) }, destructuring_object_rest_impure_computed_keys_exec, r#" var key, x, y, z; // impure key = 1; var { [key++]: y, ...x } = { 1: 1, a: 1 }; expect(x).toEqual({ a: 1 }); expect(key).toBe(2); expect(1).toBe(y); // takes care of the order key = 1; var { [++key]: y, [++key]: z, ...rest} = {2: 2, 3: 3}; expect(y).toBe(2); expect(z).toBe(3); // pure, computed property should remain as-is key = 2; ({ [key]: y, z, ...x } = {2: "two", z: "zee"}); expect(y).toBe("two"); expect(x).toEqual({}); expect(z).toBe("zee"); // rhs evaluated before lhs var order = []; function left() { order.push("left"); return 0; } function right() { order.push("right"); return {}; } var { [left()]: y, ...x} = right(); expect(order).toEqual(["right", "left"]); "# ); // destructuring_issue_5090 test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_issue_5090_exec, r#" const assign = function([...arr], index, value) { arr[index] = value; return arr; } const arr = [1, 2, 3]; assign(arr, 1, 42); expect(arr).toEqual([1, 2, 3]); "# ); // destructuring_default_precedence test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_default_precedence_exec, r#" var f0 = function (a, b = a, c = b) { return [a, b, c]; }; expect(f0(1)).toEqual([1, 1, 1]); var f1 = function ({a}, b = a, c = b) { return [a, b, c]; }; expect(f1({a: 1})).toEqual([1, 1, 1]); var f2 = function ({a}, b = a, c = a) { return [a, b, c]; }; expect(f2({a: 1})).toEqual([1, 1, 1]); "# ); //// destructuring_es7_object_rest_builtins //test!( // syntax(), // |_| tr(r#"{ // "plugins": [ // // [destructuring(Default::default()), { "useBuiltIns": true }], // spread(spread::Config{..Default::default()}), // parameters(Default::default()), // block_scoping(), // object_rest_spread(Default::default()), // ] //} //"#), // destructuring_es7_object_rest_builtins, // r#" //var z = {}; //var { ...x } = z; //var { x, ...y } = z; //var { [x]: x, ...y } = z; //(function({ x, ...y }) { }); // //({ x, y, ...z } = o); // //"#, // r#" //var z = {}; //var _z = z, // x = Object.assign({}, _z); //var _z2 = z, // x = _z2.x, // y = _objectWithoutProperties(_z2, ["x"]); //var _z3 = z, // x = _z3[x], // y = _objectWithoutProperties(_z3, [x].map(_toPropertyKey)); // //(function (_ref) { // var x = _ref.x, // y = _objectWithoutProperties(_ref, ["x"]); //}); // //var _o = o; //x = _o.x; //y = _o.y; //z = _objectWithoutProperties(_o, ["x", "y"]); //_o; // //"# //); // destructuring_parameters test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_parameters, r#" function somethingAdvanced({topLeft: {x: x1, y: y1} = {}, bottomRight: {x: x2, y: y2} = {}}, p2, p3){ } function unpackObject({title: title, author: author}) { return title + " " + author; } console.log(unpackObject({title: "title", author: "author"})); var unpackArray = function ([a, b, c], [x, y, z]) { return a+b+c; }; console.log(unpackArray(["hello", ", ", "world"], [1, 2, 3])); "#, r#" function somethingAdvanced(param, p2, p3) { var tmp = param.topLeft, _ref = tmp === void 0 ? { } : tmp, x1 = _ref.x, y1 = _ref.y, tmp1 = param.bottomRight, _ref1 = tmp1 === void 0 ? { } : tmp1, x2 = _ref1.x, y2 = _ref1.y; } function unpackObject(param) { var title = param.title, author = param.author; return title + " " + author; } console.log(unpackObject({ title: "title", author: "author" })); var unpackArray = function(param, param1) { var _param = _slicedToArray(param, 3), a = _param[0], b = _param[1], c = _param[2], _param1 = _slicedToArray(param1, 3), x = _param1[0], y = _param1[1], z = _param1[2]; return a + b + c; }; console.log(unpackArray(["hello", ", ", "world"], [1, 2, 3])); "# ); // destructuring_array_unpack_optimisation test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_array_unpack_optimisation, r#" var [a, b] = [1, 2]; var [[a, b]] = [[1, 2]]; var [a, b, ...c] = [1, 2, 3, 4]; var [[a, b, ...c]] = [[1, 2, 3, 4]]; var [a, b] = [1, 2, 3]; var [[a, b]] = [[1, 2, 3]]; var [a, b] = [a, b]; [a[0], a[1]] = [a[1], a[0]]; var [a, b] = [...foo, bar]; var [a, b] = [foo(), bar]; var [a, b] = [clazz.foo(), bar]; var [a, b] = [clazz.foo, bar]; var [a, b] = [, 2]; [a, b] = [1, 2]; [a, b] = [, 2]; ; // Avoid completion record special case "#, r#" var a = 1, b = 2; var a = 1, b = 2; var a = 1, b = 2, c = [3, 4]; var a = 1, b = 2, c = [3, 4]; var _ref = [1, 2, 3], a = _ref[0], b = _ref[1]; var _ref1 = [1, 2, 3], a = _ref1[0], b = _ref1[1]; var _ref2 = [a, b], a = _ref2[0], b = _ref2[1]; var ref; ref = [a[1], a[0]], a[0] = ref[0], a[1] = ref[1], ref; var _toConsumableArray_concat = _slicedToArray(_toConsumableArray(foo).concat([bar]), 2), a = _toConsumableArray_concat[0], b = _toConsumableArray_concat[1]; // TODO: var ref4 = _toConsumableArray(foo).concat([bar]), a = ref4[0], b = ref4[1]; var _ref3 = [foo(), bar], a = _ref3[0], b = _ref3[1]; var _ref4 = [clazz.foo(), bar], a = _ref4[0], b = _ref4[1]; var _ref5 = [clazz.foo, bar], a = _ref5[0], b = _ref5[1]; var a, b = 2; a = 1, b = 2; a = void 0, b = 2; ; // Avoid completion record special case "# ); // destructuring_known_array test!( // We will use constant propagation instead of optimizing in each pass ignore, syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_known_array, r#" var z = []; var [x, ...y] = z; "#, r#" var z = []; var x = z[0], y = z.slice(1); "# ); // destructuring_es7_object_rest test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_es7_object_rest, r#" var z = {}; var { ...x } = z; var { x, ...y } = z; var { [x]: x, ...y } = z; (function({ x, ...y }) { }); ({ x, y, ...z } = o); "#, r#" var z = {}; var x = _extends({ }, _objectDestructuringEmpty(z)); var x = z.x, y = _objectWithoutProperties(z, ["x"]); var x = z[x], y = _objectWithoutProperties(z, [x].map(_toPropertyKey)); (function (_param) { var x = _param.x, y = _objectWithoutProperties(_param, ["x"]); }); var _o; var ref; _o = o, z = _objectWithoutProperties(_o, ["x", "y"]), ref = _o, x = ref.x, y = ref.y, ref, _o; "# ); // destructuring_const test_exec!( syntax(), |_| destructuring(Default::default()), destructuring_const_exec, r#" const getState = () => ({}); const { data: { courses: oldCourses = [] } = {} } = getState(); expect(oldCourses).toEqual([]); "# ); // destructuring_assignment_expression_pattern test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), ) }, destructuring_assignment_expression_pattern, r#" var z = {}; var { x: { y } = {} } = z; "#, r#" var z = {}; var tmp = z.x, y = (tmp === void 0 ? {} : tmp).y; "# ); // destructuring_object_advanced test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), ) }, destructuring_object_advanced, r#" var rect = {}; var {topLeft: {x: x1, y: y1}, bottomRight: {x: x2, y: y2}} = rect; var { 3: foo, 5: bar } = [0, 1, 2, 3, 4, 5, 6]; "#, r#" var rect = {}; var _rect_topLeft = rect.topLeft, x1 = _rect_topLeft.x, y1 = _rect_topLeft.y, _rect_bottomRight = rect.bottomRight, x2 = _rect_bottomRight.x, y2 = _rect_bottomRight.y; var _ref = [0, 1, 2, 3, 4, 5, 6], foo = _ref[3], bar = _ref[5]; "# ); // destructuring_spread test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), ) }, destructuring_spread, r#" function isSorted([x, y, ...wow]) { if (!zs.length) return true if (y > x) return isSorted(zs) return false } "#, r#" function isSorted(param) { var _param = _toArray(param), x = _param[0], y = _param[1], wow = _param.slice(2); if (!zs.length) return true; if (y > x) return isSorted(zs); return false; } "# ); // destructuring_mixed test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), ) }, destructuring_mixed, r#" var rect = {}; var {topLeft: [x1, y1], bottomRight: [x2, y2] } = rect; "#, r#" var rect = {}; var _rect_topLeft = _slicedToArray(rect.topLeft, 2), x1 = _rect_topLeft[0], y1 = _rect_topLeft[1], _rect_bottomRight = _slicedToArray(rect.bottomRight, 2), x2 = _rect_bottomRight[0], y2 = _rect_bottomRight[1]; "# ); // destructuring_assignment_statement test!( syntax(), |_| chain!( destructuring(Default::default()), spread(Default::default()), block_scoping(Mark::new()), object_rest_spread(Default::default()) ), destructuring_assignment_statement_no_loose, r#" [a, b] = f(); "#, r#" var ref; ref = _slicedToArray(f(), 2), a = ref[0], b = ref[1], ref; "# ); // destructuring_assignment_statement_loose test!( syntax(), |_| chain!( destructuring(Config { loose: true }), spread(spread::Config { ..Default::default() }), block_scoping(Mark::new()), object_rest_spread(Default::default()) ), destructuring_assignment_statement, r#" [a, b] = f(); "#, r#" var ref; ref = f(), a = ref[0], b = ref[1], ref; "# ); // destructuring_array test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_array, r#" var [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]]; [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]]; "#, r#" var a = "hello", _ref = [", ", "junk"], b = _ref[0], c = "world"; var ref, ref1; a = "hello", ref = [", ", "junk"], b = ref[0], ref, ref1 = ["world"], c = ref1[0], ref1; "# ); // destructuring_assignment_arrow_function_no_block test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_assignment_arrow_function_no_block, r#" () => [a, b] = [1, 2] "#, r#" var ref; ()=>(ref = [1, 2], a = ref[0], b = ref[1], ref) "# ); // destructuring_issue_9834 test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), object_rest_spread(Default::default()), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_issue_9834, r#" const input = {}; const { given_name: givenName, 'last_name': lastName, [`country`]: country, [prefix + 'state']: state, [`${prefix}consents`]: consents, ...rest } = input; "#, r#" var input = {}; var _key = prefix + 'state', _key1 = `${prefix}consents`, givenName = input.given_name, lastName = input['last_name'], country = input[`country`], state = input[_key], consents = input[_key1], rest = _objectWithoutProperties(input, ["given_name", 'last_name', `country`, _key, _key1].map(_toPropertyKey)); "# ); // destructuring_number_key_with_object_rest_spread test_exec!( syntax(), |_| chain!( object_rest_spread(Default::default()), destructuring(Default::default()) ), destructuring_number_key_with_object_rest_spread_exec, r#" const foo = { 1: "a", 2: "b", 3: "c", }; const { [1]: bar, ...rest } = foo; expect(bar).toBe("a"); expect(rest).toEqual({ 2: "b", 3: "c" }); "# ); // destructuring_for_in test!( syntax(), |_| chain!( spread(Default::default()), destructuring(Default::default()), block_scoping(Mark::new()), object_rest_spread(Default::default()), ), destructuring_for_in, r#" for (var [name, value] in obj) { print("Name: " + name + ", Value: " + value); } for ([name, value] in obj) { print("Name: " + name + ", Value: " + value); } "#, r#" for(var _$ref in obj){ var _ref = _slicedToArray(_$ref, 2), name = _ref[0], value = _ref[1]; print("Name: " + name + ", Value: " + value); } var _$ref1; for(ref in obj){ _$ref1 = _slicedToArray(ref, 2), name = _$ref1[0], value = _$ref1[1], _$ref1; print("Name: " + name + ", Value: " + value); }"# ); // destructuring_for_in_loose test!( syntax(), |_| chain!( spread(spread::Config { ..Default::default() }), destructuring(Config { loose: true }), block_scoping(Mark::new()), object_rest_spread(Default::default()), ), destructuring_for_in_loose, r#" for (var [name, value] in obj) { print("Name: " + name + ", Value: " + value); } for ([name, value] in obj) { print("Name: " + name + ", Value: " + value); } "#, r#" for(var _$ref in obj){ var name = _$ref[0], value = _$ref[1]; print("Name: " + name + ", Value: " + value); } var _$ref1; for(ref in obj){ _$ref1 = ref, name = _$ref1[0], value = _$ref1[1], _$ref1; print("Name: " + name + ", Value: " + value); }"# ); // destructuring_issue_5744 test!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_issue_5744, r#" if (true) [a, b] = [b, a]; "#, r#" var ref; if (true) ref = [b, a], a = ref[0], b = ref[1], ref; "# ); // destructuring_spread_generator test_exec!( syntax(), |_| { let unresolved_mark = Mark::new(); let top_level_mark = Mark::new(); chain!( resolver(unresolved_mark, top_level_mark, false), spread(Default::default()), parameters(Default::default(), unresolved_mark), destructuring(Default::default()), block_scoping(unresolved_mark), object_rest_spread(Default::default()), ) }, destructuring_spread_generator_exec, r#" function* f() { for (var i = 0; i < 3; i++) { yield i; } } var [...xs] = f(); expect(xs).toEqual([0, 1, 2]); "# ); test!( syntax(), |_| tr(), custom_call, "foo([a, b] = [1, 2])", "var ref; foo((ref = [1, 2], a = ref[0], b = ref[1], ref));" ); test!( syntax(), |_| tr(), issue_1477_1, " const [ { a: a_ = 1 } ] = b ", " const _b_ = b[0], tmp = _b_.a, a_ = tmp === void 0 ? 1 : tmp; " ); test!( syntax(), |_| tr(), issue_1477_2, " async function f(a, b) { const [ { a: a_ = 1 } ] = JSON.parse(b) } ", " async function f(a, b) { const _JSON_parse = JSON.parse(b), _JSON_parse_ = _JSON_parse[0], tmp = _JSON_parse_.a, a_ \ = tmp === void 0 ? 1 : tmp; } " ); test!( syntax(), |_| tr(), issue_1477_3, " const [ a = 1 ] = b ", " const tmp = b[0], a = tmp === void 0 ? 1 : tmp; " ); test!( syntax(), |_| tr(), issue_1477_4, " [ a = 1 ] = b ", " var ref, ref1; ref = b, ref1 = ref[0], a = ref1 === void 0 ? 1 : ref1, ref; " ); test!( syntax(), |_| tr(), next_001, " const { NODE_ENV }= process.env; ", " const NODE_ENV = process.env.NODE_ENV; " ); test!( syntax(), |_| tr(), next_002, " ({ NODE_ENV }= process.env); ", " NODE_ENV = process.env.NODE_ENV; " ); test!( syntax(), |_| tr(), issue_3315_1, "\ var baz = 1; ({ foo: bar = baz } = {}); ", "\ var baz = 1; var ref, ref1; ref = {}, ref1 = ref.foo, bar = ref1 === void 0 ? baz : ref1, ref; " ); test!( syntax(), |_| tr(), issue_3315_2, "\ var baz = 1; [bar = baz] = []; ", "\ var baz = 1; var ref, ref1; ref = [], ref1 = ref[0], bar = ref1 === void 0 ? baz : ref1, ref; " ); test!( syntax(), |_| tr(), statements_let_dstr_ary_ptrn_elem_id_init_hole, "\ let [x = 23] = [,]; assert.sameValue(x, 23); ", "\ let x = 23; assert.sameValue(x, 23); " ); test!( syntax(), |_| tr(), statements_let_dstr_ary_ptrn_elem_id_init_hole_2, "\ let y = [x = 23] = [,]; ", "\ var ref, ref1; let y = (ref = [,], ref1 = ref[0], x = ref1 === void 0 ? 23 : ref1, ref); " ); test!( syntax(), |_| tr(), statements_const_dstr_ary_ptrn_elem_id_init_hole, "\ const [x = 23] = [,]; assert.sameValue(x, 23); ", "\ const x = 23; assert.sameValue(x, 23); " ); test!( syntax(), |_| tr(), statements_const_dstr_ary_ptrn_elem_id_init_hole_2, "const [x = 23, y = 42] = [,,];", "const x = 23, y = 42;" ); test!( syntax(), |_| tr(), statements_const_dstr_ary_ptrn_elem_id_init_hole_3, "const [x = 23, y] = [, 42];", "const x = 23, y = 42;" ); test!( syntax(), |_| tr(), statements_const_dstr_ary_ptrn_elem_id_init_hole_4, "\ function* foo() { yield 1; yield 2; } let bar = foo(); const [x = bar.next().value, y] = [, bar.next().value]; console.log(x, y); ", "\ function* foo() { yield 1; yield 2; } let bar = foo(); const _ref = [,bar.next().value], tmp = _ref[0], x = tmp === void 0 ? bar.next().value : tmp, y = _ref[1]; console.log(x, y);" ); test!( syntax(), |_| tr(), for_const_dstr_ary_ptrn_elem_id_init_hole, "\ var iterCount = 0; for (const [x = 23] = [,]; iterCount < 1; ) { assert.sameValue(x, 23); // another statement iterCount += 1; } assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); ", "\ var iterCount = 0; for(const x = 23; iterCount < 1;){ assert.sameValue(x, 23); iterCount += 1; } assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); " ); test!( syntax(), |_| tr(), statements_const_id_init_hole, "\ const [x] = [,]; const [y] = [,], [z] = [,] ", "\ const x = void 0; const y = void 0, z = void 0; " ); test!( syntax(), |_| tr(), statements_let_id_init_hole, "let [x] = [,];", "let x;" ); test!( syntax(), |_| tr(), issue_6304, "let [] = [];", "let _ref = [];" ); test!( syntax(), |_| tr(), issue_6304_1, "let [] = [,];", "let _ref = [,];" ); test!( syntax(), |_| tr(), issue_6304_2, "let [] = [...[1, 2, 3]];", "let _ref = [...[1, 2, 3]];" );