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24 lines
865 B
TypeScript
24 lines
865 B
TypeScript
// @target: es5,es2015
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// @noTypesAndSymbols: true
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// https://github.com/microsoft/TypeScript/issues/39205
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let trace: any[] = [];
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let order = (n: any): any => trace.push(n);
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// order(0) should evaluate before order(1) because the first element is undefined
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let [{ [order(1)]: x } = order(0)] = [];
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// order(0) should not evaluate because the first element is defined
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let [{ [order(1)]: y } = order(0)] = [{}];
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// order(0) should evaluate first (destructuring of object literal {})
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// order(1) should evaluate next (initializer because property is undefined)
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// order(2) should evaluate last (evaluate object binding pattern from initializer)
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let { [order(0)]: { [order(2)]: z } = order(1), ...w } = {} as any;
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// https://github.com/microsoft/TypeScript/issues/39181
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// b = a must occur *after* 'a' has been assigned
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let [{ ...a }, b = a]: any[] = [{ x: 1 }]
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