@babel/core/lib/transformation/util/clone-deep.js

Babel compiler core.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;
const circleSet = new Set();
let depth = 0;
function deepClone(value, cache, allowCircle) {
  if (value !== null) {
    if (allowCircle) {
      if (cache.has(value)) return cache.get(value);
    } else if (++depth > 250) {
      if (circleSet.has(value)) {
        depth = 0;
        circleSet.clear();
        throw new Error("Babel-deepClone: Cycles are not allowed in AST");
      }
      circleSet.add(value);
    }
    let cloned;
    if (Array.isArray(value)) {
      cloned = new Array(value.length);
      if (allowCircle) cache.set(value, cloned);
      for (let i = 0; i < value.length; i++) {
        cloned[i] = typeof value[i] !== "object" ? value[i] : deepClone(value[i], cache, allowCircle);
      }
    } else {
      cloned = {};
      if (allowCircle) cache.set(value, cloned);
      const keys = Object.keys(value);
      for (let i = 0; i < keys.length; i++) {
        const key = keys[i];
        cloned[key] = typeof value[key] !== "object" ? value[key] : deepClone(value[key], cache, allowCircle || key === "leadingComments" || key === "innerComments" || key === "trailingComments" || key === "extra");
      }
    }
    if (!allowCircle) {
      if (depth-- > 250) circleSet.delete(value);
    }
    return cloned;
  }
  return value;
}
function _default(value) {
  if (typeof value !== "object") return value;
  {
    try {
      return deepClone(value, new Map(), true);
    } catch (_) {
      return structuredClone(value);
    }
  }
}
0 && 0;

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