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31 lines
711 B
TypeScript
31 lines
711 B
TypeScript
function use<T>(promise: PromiseLike<T>): T {
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const internal: PromiseLike<T> & {
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status?: 'pending' | 'fulfilled' | 'rejected';
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value?: T;
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reason?: any;
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} = promise;
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if (internal.status === 'fulfilled') {
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return internal.value as T;
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}
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if (internal.status === 'rejected') {
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throw internal.reason;
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} else if (internal.status === 'pending') {
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throw internal;
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} else {
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internal.status = 'pending';
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internal.then(
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(result) => {
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internal.status = 'fulfilled';
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internal.value = result;
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},
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(reason) => {
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internal.status = 'rejected';
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internal.reason = reason;
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},
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);
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throw internal;
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}
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}
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export default use;
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