Would there be an is_struct/2 version?
defmodule Example do
defstruct […]
def sample(struct) when is_struct(struct, __MODULE__), do: {:ok, struct}
def sample(_), do: :error
end
if not is there any naming convention for it (like we have @type t spec)?
defmodule Example do
defstruct […]
@type t :: %__MODULE__{…}
defguard is_t(struct) when is_struct(struct) and :erlang.map_get(:__struct__, struct) === __MODULE__
def sample(struct) when is_t(struct), do: {:ok, struct}
def sample(_), do: :error
end
Would be added also other features discussed in this topic?
Looks like Bob actually sleeps more than a typical human. 
For sure generally I don’t mind, but if I remember correctly Bob had exactly same problem with at least one previous release as well, so it does not a single standalone edge-case.
Also there are some extra warnings when building elixir at tests step:
https://github.com/elixir-lang/elixir/issues/9700
