68 lines
3.1 KiB
TypeScript
68 lines
3.1 KiB
TypeScript
//// [destructuringArrayBindingPatternAndAssignment2.ts]
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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]]] = [] // Error
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var [[a2], [[a3]]] = undefined // Error
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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]: [number, boolean, string] = [1, 2, "string"]; // Error
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interface J extends Array<Number> {
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2: number;
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}
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function bar(): J {
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return <[number, number, number]>[1, 2, 3];
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}
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var [b3 = "string", b4, b5] = bar(); // Error
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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 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]: [number, number] = [...temp]; // Error
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var [c2, c3]: [string, string] = [...temp]; // Error
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interface F {
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[idx: number]: boolean
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}
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function foo(idx: number): F {
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return {
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2: true
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}
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}
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var [c4, c5, c6] = foo(1); // Error
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//// [destructuringArrayBindingPatternAndAssignment2.js]
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var __spreadArrays = (this && this.__spreadArrays) || function () {
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for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
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for (var r = Array(s), k = 0, i = 0; i < il; i++)
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for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
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r[k] = a[j];
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return r;
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};
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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 _a = [], a0 = _a[0][0], a1 = _a[1][0][0]; // Error
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var a2 = undefined[0][0], a3 = undefined[1][0][0]; // Error
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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 _b = [1, 2, "string"], b0 = _b[0], b1 = _b[1], b2 = _b[2]; // Error
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function bar() {
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return [1, 2, 3];
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}
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var _c = bar(), _d = _c[0], b3 = _d === void 0 ? "string" : _d, b4 = _c[1], b5 = _c[2]; // Error
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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 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 _e = __spreadArrays(temp), c0 = _e[0], c1 = _e[1]; // Error
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var _f = __spreadArrays(temp), c2 = _f[0], c3 = _f[1]; // Error
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function foo(idx) {
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return {
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2: true
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};
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}
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var _g = foo(1), c4 = _g[0], c5 = _g[1], c6 = _g[2]; // Error
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