110 lines
4.9 KiB
TypeScript
110 lines
4.9 KiB
TypeScript
//// [destructuringArrayBindingPatternAndAssignment1ES5.ts]
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/* AssignmentPattern:
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* ObjectAssignmentPattern
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* ArrayAssignmentPattern
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* ArrayAssignmentPattern:
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* [Elision<opt> AssignmentRestElementopt ]
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* [AssignmentElementList]
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* [AssignmentElementList, Elision<opt> AssignmentRestElementopt ]
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* AssignmentElementList:
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* Elision<opt> AssignmentElement
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* AssignmentElementList, Elisionopt AssignmentElement
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* AssignmentElement:
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* LeftHandSideExpression Initialiseropt
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* AssignmentPattern Initialiseropt
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* AssignmentRestElement:
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* ... LeftHandSideExpression
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*/
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// In a destructuring assignment expression, the type of the expression on the right must be assignable to the assignment target on the left.
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// An expression of type S is considered assignable to an assignment target V if one of the following is true
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// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
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// S is the type Any, or
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var [a0, a1]: any = undefined;
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var [a2 = false, a3 = 1]: any = undefined;
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// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
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// S is a tuple- like type (section 3.3.3) with a property named N of a type that is assignable to the target given in E,
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// where N is the numeric index of E in the array assignment pattern, or
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var [b0, b1, b2] = [2, 3, 4];
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var [b3, b4, b5]: [number, number, string] = [1, 2, "string"];
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function foo() {
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return [1, 2, 3];
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}
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var [b6, b7] = foo();
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var [...b8] = foo();
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// S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
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var temp = [1,2,3]
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var [c0, c1] = [...temp];
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var [c2] = [];
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var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
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var [[c5], c6]: [[string|number], boolean] = [[1], true];
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var [, c7] = [1, 2, 3];
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var [,,, c8] = [1, 2, 3, 4];
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var [,,, c9] = [1, 2, 3, 4];
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var [,,,...c10] = [1, 2, 3, 4, "hello"];
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var [c11, c12, ...c13] = [1, 2, "string"];
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var [c14, c15, c16] = [1, 2, "string"];
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//// [destructuringArrayBindingPatternAndAssignment1ES5.js]
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/* AssignmentPattern:
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* ObjectAssignmentPattern
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* ArrayAssignmentPattern
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* ArrayAssignmentPattern:
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* [Elision<opt> AssignmentRestElementopt ]
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* [AssignmentElementList]
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* [AssignmentElementList, Elision<opt> AssignmentRestElementopt ]
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* AssignmentElementList:
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* Elision<opt> AssignmentElement
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* AssignmentElementList, Elisionopt AssignmentElement
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* AssignmentElement:
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* LeftHandSideExpression Initialiseropt
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* AssignmentPattern Initialiseropt
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* AssignmentRestElement:
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* ... LeftHandSideExpression
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*/
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var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
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if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
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if (ar || !(i in from)) {
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if (!ar) ar = Array.prototype.slice.call(from, 0, i);
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ar[i] = from[i];
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}
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}
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return to.concat(ar || Array.prototype.slice.call(from));
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};
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// In a destructuring assignment expression, the type of the expression on the right must be assignable to the assignment target on the left.
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// An expression of type S is considered assignable to an assignment target V if one of the following is true
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// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
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// S is the type Any, or
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var a0 = undefined[0], a1 = undefined[1];
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var _a = undefined[0], a2 = _a === void 0 ? false : _a, _b = undefined[1], a3 = _b === void 0 ? 1 : _b;
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// V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
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// S is a tuple- like type (section 3.3.3) with a property named N of a type that is assignable to the target given in E,
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// where N is the numeric index of E in the array assignment pattern, or
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var _c = [2, 3, 4], b0 = _c[0], b1 = _c[1], b2 = _c[2];
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var _d = [1, 2, "string"], b3 = _d[0], b4 = _d[1], b5 = _d[2];
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function foo() {
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return [1, 2, 3];
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}
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var _e = foo(), b6 = _e[0], b7 = _e[1];
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var b8 = foo().slice(0);
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// S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
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var temp = [1, 2, 3];
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var _f = __spreadArray([], temp, true), c0 = _f[0], c1 = _f[1];
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var c2 = [][0];
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var _g = [[[]], [[[[]]]]], c3 = _g[0][0][0], c4 = _g[1][0][0][0][0];
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var _h = [[1], true], c5 = _h[0][0], c6 = _h[1];
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var _j = [1, 2, 3], c7 = _j[1];
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var _k = [1, 2, 3, 4], c8 = _k[3];
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var _l = [1, 2, 3, 4], c9 = _l[3];
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var _m = [1, 2, 3, 4, "hello"], c10 = _m.slice(3);
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var _o = [1, 2, "string"], c11 = _o[0], c12 = _o[1], c13 = _o.slice(2);
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var _p = [1, 2, "string"], c14 = _p[0], c15 = _p[1], c16 = _p[2];
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