ramda/src/internal/_clone.js

var _cloneRegExp =
/*#__PURE__*/
require("./_cloneRegExp");

var type =
/*#__PURE__*/
require("../type");
/**
 * Copies an object.
 *
 * @private
 * @param {*} value The value to be copied
 * @param {Array} refFrom Array containing the source references
 * @param {Array} refTo Array containing the copied source references
 * @param {Boolean} deep Whether or not to perform deep cloning.
 * @return {*} The copied value.
 */


function _clone(value, refFrom, refTo, deep) {
  var copy = function copy(copiedValue) {
    var len = refFrom.length;
    var idx = 0;

    while (idx < len) {
      if (value === refFrom[idx]) {
        return refTo[idx];
      }

      idx += 1;
    }

    refFrom[idx + 1] = value;
    refTo[idx + 1] = copiedValue;

    for (var key in value) {
      copiedValue[key] = deep ? _clone(value[key], refFrom, refTo, true) : value[key];
    }

    return copiedValue;
  };

  switch (type(value)) {
    case 'Object':
      return copy({});

    case 'Array':
      return copy([]);

    case 'Date':
      return new Date(value.valueOf());

    case 'RegExp':
      return _cloneRegExp(value);

    default:
      return value;
  }
}

module.exports = _clone;