Attributes.update-exclamation-mark
You're seeing just the function
update-exclamation-mark, go back to Attributes module for more information.
Updates attribute in path and raise error if not found.
Available at compile time only.
It is the extension of update/3 that requires the value and the path to be defined:
- path should exist
- value should not be
nil
Example
Attributes.update!(MyModule, [:path], :value)