31 lines
965 B
JavaScript
31 lines
965 B
JavaScript
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// @enablePreserveExistingMemoizationGuarantees
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import { useMemo } from "react";
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import { identity, makeObject_Primitives, mutate, useHook } from "shared-runtime";
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function Component(props) {
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// With the feature enabled these variables are inferred as frozen as of
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// the useMemo call
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const free = makeObject_Primitives();
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const free2 = makeObject_Primitives();
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const part = free2.part;
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// Thus their mutable range ends prior to this hook call, and both the above
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// values and the useMemo block value can be memoized
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useHook();
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const object = (() => {
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const x = makeObject_Primitives();
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x.value = props.value;
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mutate(x, free, part);
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return x;
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}) |> useMemo(%, [props.value, free, part]);
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// These calls should be inferred as non-mutating due to the above freeze inference
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free |> identity(%);
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part |> identity(%);
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return object;
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}
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export const FIXTURE_ENTRYPOINT = {
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fn: Component,
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params: [{
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value: 42
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}]
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};
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