Class Scope

packages/pluginutils/src/attachScopes.ts:24–59

}

class Scope implements AttachedScope {
  parent?: AttachedScope;
  isBlockScope: boolean;
  declarations: { [key: string]: boolean };

  constructor(options: ScopeOptions = {}) {
    this.parent = options.parent;
    this.isBlockScope = !!options.block;

    this.declarations = Object.create(null);

    if (options.params) {
      options.params.forEach((param) => {
        extractAssignedNames(param).forEach((name) => {
          this.declarations[name] = true;
        });
      });
    }
  }

  addDeclaration(node: estree.Node, isBlockDeclaration: boolean, isVar: boolean): void {
    if (!isBlockDeclaration && this.isBlockScope) {
      // it's a `var` or function node, and this
      // is a block scope, so we need to go up
      this.parent!.addDeclaration(node, isBlockDeclaration, isVar);
    } else if ((node as any).id) {
      extractAssignedNames((node as any).id).forEach((name) => {
        this.declarations[name] = true;
      });
    }
  }

  contains(name: string): boolean {
    return this.declarations[name] || (this.parent ? this.parent.contains(name) : false);
  }
}

const attachScopes: AttachScopes = function attachScopes(ast, propertyName = 'scope') {
  let scope = new Scope();