Provides a standard callback implementation for the Access behaviour.

Implements the following callbacks for the struct where this module is used:

• Access.fetch/2
• Access.get_and_update/3
• Access.pop/2

To define these callback and include the proper behavior all you have to do is add use StructAccess to the module defining your struct.

Adding

use StructAccess

to a module is equivalent to adding the following to that module:

@behaviour Access

@impl Access
def fetch(struct, key), do: StructAccess.fetch(struct, key)

@impl Access
def get_and_update(struct, key, fun) when is_function(fun, 1) do
  StructAccess.get_and_update(struct, key, fun)
end

@impl Access
def pop(struct, key, default \ nil) do
  StructAccess.pop(struct, key, default)
end

defoverridable Access

This module is simply a shortcut to avoid that boilerplate.

If any of the implementations in StructAccess are not sufficient, they all can be overridden.