_asyncOptionalChainDelete.js 1.6 KB

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  1. import { _asyncOptionalChain } from './_asyncOptionalChain.js';
  2. // https://github.com/alangpierce/sucrase/tree/265887868966917f3b924ce38dfad01fbab1329f
  3. /**
  4. * Polyfill for the optional chain operator, `?.`, given previous conversion of the expression into an array of values,
  5. * descriptors, and functions, in cases where the value of the expression is to be deleted.
  6. *
  7. * Adapted from Sucrase (https://github.com/alangpierce/sucrase) See
  8. * https://github.com/alangpierce/sucrase/blob/265887868966917f3b924ce38dfad01fbab1329f/src/transformers/OptionalChainingNullishTransformer.ts#L15
  9. *
  10. * @param ops Array result of expression conversion
  11. * @returns The return value of the `delete` operator: `true`, unless the deletion target is an own, non-configurable
  12. * property (one which can't be deleted or turned into an accessor, and whose enumerability can't be changed), in which
  13. * case `false`.
  14. */
  15. async function _asyncOptionalChainDelete(ops) {
  16. const result = (await _asyncOptionalChain(ops)) ;
  17. // If `result` is `null`, it means we didn't get to the end of the chain and so nothing was deleted (in which case,
  18. // return `true` since that's what `delete` does when it no-ops). If it's non-null, we know the delete happened, in
  19. // which case we return whatever the `delete` returned, which will be a boolean.
  20. return result == null ? true : (result );
  21. }
  22. // Sucrase version:
  23. // async function asyncOptionalChainDelete(ops) {
  24. // const result = await ASYNC_OPTIONAL_CHAIN_NAME(ops);
  25. // return result == null ? true : result;
  26. // }
  27. export { _asyncOptionalChainDelete };
  28. //# sourceMappingURL=_asyncOptionalChainDelete.js.map