Exceptions

Raising exceptions

First, the official warning: exceptions in Elixir are not control-flow structures. Instead, Elixir exceptions are intended for things that should never happen in normal operation. That means the database going down or a name server failing to respond could be considered exceptional. Failing to open a configuration file whose name is fixed could be seen as exceptional. However, failing to open a file whose name a user entered is not.

We raise an exception with the raise function. At its simplest level, we pass it a string, and it generates an exception of ...