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lib/patch/apply.ex
defmodule Patch.Apply do
@moduledoc """
Utility module to assist with applying functions.
"""
@doc """
Safe application of an anonymous function.
This is just like `apply/2` but if the the anonymous function is unable to
handle the call (raising either `BadArityError` or `FunctionClauseError`) then
the `:error` atom is returned.
If the function evaluates successfully its reply is returned wrapped in an
`{:ok, result}` tuple.
"""
@spec safe(function :: function(), arguments :: [term()]) :: {:ok, term()} | :error
def safe(function, arguments) do
try do
result = apply(function, arguments)
{:ok, result}
rescue
BadArityError ->
:error
FunctionClauseError ->
:error
end
end
end