View Source Protocol.UndefinedError exception (Elixir v1.18.0-dev)
An exception raised when a protocol is not implemented for a given value.
The following fields of this exception are public and can be accessed freely:
:protocol
(module/0
) - the protocol that is not implemented:value
(term/0
) - the value that does not implement the protocol
For example, this code:
Enum.at("A string!", 0)
would raise the following exception:
%Protocol.UndefinedError{
protocol: Enumerable,
value: "A string!",
# ...
}