Seems to be recognized as a keyword instead of function Kernel.sigil_U

CompileError: Not allowed keyword :sigil_U

Thanks for a cool project.

Question. Should the AST be run through Macro.expand/2 before validating? Or is that outside the scope of the project?

If you would like, I can take a shot at this and support a pr.

I am happy to submit a pull request for this one. Here's the test case. Case and cond require ->.

Test case:

iex(1)> code =
...(1)> """
...(1)> case animal do
...(1)> :cat -> "meow"
...(1)> :dog -> "arf"
...(1)> end
...(1)> """
"case animal do\n :cat -> "meow"\n :dog -> "arf"\nend\n"
iex(2)> Code.eval_string code, [animal: :dog]
{"arf", [animal: :dog]}
iex(3)> {_status, quoted} = Code.string_to_quoted code
{:ok,
{:case, [line: 1],
[
{:animal, [line: 1], nil},
[
do: [
{:->, [line: 2], [[:cat], "meow"]},
{:->, [line: 3], [[:dog], "arf"]}
]
]
]}}
iex(4)> Loppers.validate quoted, whitelist: Loppers.special_forms
{:error,
[
not_allowed: {:->, [line: 3], [[:dog], "arf"]},
not_allowed: {:->, [line: 2], [[:cat], "meow"]}
]}
iex(5)> Loppers.validate quoted, whitelist: Loppers.special_forms ++ [:->]
:ok

Add support for a white/blacklist of modules availalable for use.

e.g.:

iex(33)> Loppers.validate("%{one: 1}.one" |> Code.string_to_quoted |> elem(1), whitelist: Loppers.special_forms)
{:error,
[
not_allowed: {** {:., [line: 1], [{:%{}, [line: 1], [one: 1]}, :one] **},
[line: 1], []}
]}

Is this something I need to handle before I pass off to loppers?