Function vector

system/lib/libcxx/include/__vector/vector.h:147–154

  }

  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit vector(size_type __n) {
    auto __guard = std::__make_exception_guard(__destroy_vector(*this));
    if (__n > 0) {
      __vallocate(__n);
      __construct_at_end(__n);
    }
    __guard.__complete();
  }

#if _LIBCPP_STD_VER >= 14
  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit vector(size_type __n, const allocator_type& __a)