simple-squiggle

A restricted subset of Squiggle
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access.js (1336B)

      1 import { errorTransform } from '../../transform/utils/errorTransform.js';
      2 import { getSafeProperty } from '../../../utils/customs.js';
      3 export function accessFactory(_ref) {
      4   var {
      5     subset
      6   } = _ref;
      7 
      8   /**
      9    * Retrieve part of an object:
     10    *
     11    * - Retrieve a property from an object
     12    * - Retrieve a part of a string
     13    * - Retrieve a matrix subset
     14    *
     15    * @param {Object | Array | Matrix | string} object
     16    * @param {Index} index
     17    * @return {Object | Array | Matrix | string} Returns the subset
     18    */
     19   return function access(object, index) {
     20     try {
     21       if (Array.isArray(object)) {
     22         return subset(object, index);
     23       } else if (object && typeof object.subset === 'function') {
     24         // Matrix
     25         return object.subset(index);
     26       } else if (typeof object === 'string') {
     27         // TODO: move getStringSubset into a separate util file, use that
     28         return subset(object, index);
     29       } else if (typeof object === 'object') {
     30         if (!index.isObjectProperty()) {
     31           throw new TypeError('Cannot apply a numeric index as object property');
     32         }
     33 
     34         return getSafeProperty(object, index.getObjectProperty());
     35       } else {
     36         throw new TypeError('Cannot apply index: unsupported type of object');
     37       }
     38     } catch (err) {
     39       throw errorTransform(err);
     40     }
     41   };
     42 }