src computed.ts

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  interface Props {
  [key: string]: any;
}
 
interface ComputedMetadata {
  description?: string;
  // deps?: string[];
}
 
interface ComputedFn<T> {
  (props: Props): T;
}
 
export function computed<T>(handler: ComputedFn<T>, metadata: ComputedMetadata): ComputedDef<T> {
  return {
    __type: 'computed',
    handler,
    metadata,
  };
}
 
interface ComputedDef<T> {
  __type: 'computed';
  handler: ComputedFn<T>;
  metadata: ComputedMetadata;
}