Class __destroy_vector

system/lib/libcxx/include/__vector/vector.h:245–259

private:
  class __destroy_vector {
  public:
    _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI __destroy_vector(vector& __vec) : __vec_(__vec) {}

    _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void operator()() {
      if (__vec_.__begin_ != nullptr) {
        __vec_.clear();
        __vec_.__annotate_delete();
        __alloc_traits::deallocate(__vec_.__alloc_, __vec_.__begin_, __vec_.capacity());
      }
    }

  private:
    vector& __vec_;
  };

public:
  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI ~vector() { __destroy_vector (*this)(); }