Requires:;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`.
Requires:要求：;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`.可由 `args` 构造。 返回值：;; 若成功插入元素则返回 `true`。 并发特性：;; 会阻塞当前对象 `*this` 的扩容重哈希操作。
admin
Requires:要求：;; `value_type`is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`.可由 `args` 构造。返回值：;; 若成功插入元素则返回 `true`。
并发特性：;; 会阻塞当前对象 `*this` 的扩容重哈希操作。