Vue Router中Matcher的初始化流程

declare type Location = {
  _normalized?: boolean;
  name?: string;
  path?: string;
  hash?: string;
  query?: Dictionary<string>;
  params?: Dictionary<string>;
  append?: boolean;
  replace?: boolean;
}

declare type RawLocation = string | Location  //除了是Location类型还可以是字符串

declare type Route = {
  path: string;
  name: ?string;
  hash: string;
  query: Dictionary<string>;
  params: Dictionary<string>;
  fullPath: string;
  matched: Array<RouteRecord>;
  redirectedFrom?: string;
  meta?: any;
}

declare type RouteRecord = {
  path: string;
  regex: RouteRegExp;
  components: Dictionary<any>;
  instances: Dictionary<any>;   //表示组件的实例 一个对象类型
  name: ?string;
  parent: ?RouteRecord;  //表示父的 RouteRecord 
  redirect: ?RedirectOption;
  matchAs: ?string;
  beforeEnter: ?NavigationGuard;
  meta: any;
  props: boolean | Object | Function | Dictionary<boolean | Object | Function>;
}

//记录path 及 path到RouteRecord的映射
if (!pathMap[record.path]) {
    pathList.push(record.path)  //  ['/aaa/bbb','/cccc/ddd']
    pathMap[record.path] = record  //path值作为key 
    //  /aaa/bbb:{ path:"/aaa/bbb" ,regex : //}
}

//记录name到RouteRecord的映射；  name值作为key
if (name) {
    if (!nameMap[name]) {
      nameMap[name] = record
    } else if (process.env.NODE_ENV !== 'production' && !matchAs) {
      warn(
        false,
        `Duplicate named routes definition: ` +
          `{ name: "${name}", path: "${record.path}" }`
      )
    }
  }

function formatMatch (record: ?RouteRecord): Array<RouteRecord> {
  const res = []
  while (record) {
    res.unshift(record)
    record = record.parent
  }
  return res
}