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lib/zig/parser/resource.ex
defmodule Zig.Parser.Resource do
@moduledoc """
resource parser object
"""
@enforce_keys [:name]
defstruct @enforce_keys ++ [:doc, :cleanup]
@type t :: %__MODULE__{
name: atom,
cleanup: atom,
doc: String.t()
}
alias Zig.Parser.ResourceCleanup
def register_resource_definition(context = %{local: %{name: res}}) do
# search through global for a resource_cleanup that matches our name argument.
# if it's found it then update it. If it's not found then merely append the
# resource definition to the global parser state.
if Enum.any?(context.global, &match?(%ResourceCleanup{for: ^res}, &1)) do
new_global = replace_cleanup(context.global, context.local)
%{context | global: new_global}
else
%{context | global: [context.local | context.global]}
end
end
# no need for an empty list base case since we know there must exist one match.
defp replace_cleanup([%ResourceCleanup{for: res, name: cleanup} | rest], r = %{name: res}) do
[%{r | cleanup: cleanup} | rest]
end
defp replace_cleanup([any | rest], res), do: [any | replace_cleanup(rest, res)]
end