WithClauseError exception (Elixir v1.19.1)

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An exception raised when a term in a with/1 expression does not match any of the defined -> clauses in its else.

For example, this exception gets raised for a with/1 like the following, because the {:ok, 2} term does not match the :error or {:error, _} clauses in the else:

iex> with {:ok, 1} <- {:ok, 2} do
...>   :woah
...> else
...>   :error -> :error
...>   {:error, _} -> :error
...> end
** (WithClauseError) no with clause matching:
...

The following fields of this exception are public and can be accessed freely:

  • :term (term/0) - the term that did not match any of the clauses