17 lines
276 B
JavaScript
17 lines
276 B
JavaScript
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// @noflow
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/**
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* Test that shows how the implementation of union types is broken
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*/
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////////////////
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// interference
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////////////////
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function square(x? = 0) {
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return x * x;
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}
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function foo(f: ((_: ?number) => ?number) | (() => void)) { }
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foo((x): number => square(x))
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