Class Variable

src/adapter/variableStore.ts:648–764

const isNumberOrNumeric = (s: string | number) => typeof s === 'number' || /^[0-9]+$/.test(s);

class Variable implements IVariable {
  public id = getVariableId();

  /** Gets the variable name in its parent scope or object. */
  public get name() {
    return this.context.name;
  }

  /** Gets the presentation hint set by the parent. */
  public get sortOrder() {
    return this.context.sortOrder;
  }

  constructor(
    protected readonly context: VariableContext,
    public readonly remoteObject: Cdp.Runtime.RemoteObject,
  ) {}

  /**
   * Gets the accessor though which this object can be read.
   */
  public get accessor(): string {
    const { parent, name, isCustomProperty } = this.context;
    if (parent instanceof AccessorVariable) {
      return parent.accessor;
    }

    if (!(parent instanceof Variable)) {
      return this.context.name;
    }

    if (isCustomProperty) {
      const prefix = `${parent.accessor}[Symbol.for(${
        JSON.stringify(DescriptionSymbols.Properties)
      })]()`;
      if (isNumberOrNumeric(name)) {
        return `${prefix}[${name}]`;
      }
      if (identifierRe.test(name)) {
        return `${prefix}.${name}`;
      }
      return `${prefix}[${JSON.stringify(name)}]`;
    }

    // Maps and sets:
    const grandparent = parent.context.parent;
    if (grandparent instanceof Variable) {
      if ((this.remoteObject.subtype as string) === 'internal#entry') {
        return `[...${grandparent.accessor}.entries()][${+name}]`;
      }

      if ((parent.remoteObject.subtype as string) === 'internal#entry') {
        return `${parent.accessor}[${this.name === 'key' ? 0 : 1}]`;
      }
    }

    if (isNumberOrNumeric(name)) {
      return `${parent.accessor}[${name}]`;