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Rust templates and quasiquoting for Elixir

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rustq lib rustq codegen defrust_module.ex
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lib/rustq/codegen/defrust_module.ex 

defmodule RustQ.Codegen.DefrustModule do

  @moduledoc false



  alias RustQ.Meta.AST, as: MetaAST



  @native_sources [

    "native/rustq_nif/src/decode.rs",

    "native/rustq_nif/src/parse.rs",

    "native/rustq_nif/src/parse_item.rs",

    "native/rustq_nif/src/parse_type.rs"

  ]



  defmacro __using__(opts) do

    callable_modules = Keyword.get(opts, :callable_modules, [])



    opts =

      Keyword.update(opts, :rust_sources, @native_sources, fn sources ->

        (@native_sources ++ List.wrap(sources)) |> Enum.uniq()

      end)



    requires = Enum.map(callable_modules, &quote(do: require(unquote(&1))))



    quote do

      unquote_splicing(requires)

      use RustQ.Meta, unquote(opts)



      alias RustQ.Type, as: R



      @before_compile RustQ.Codegen.DefrustModule

    end

  end



  defmacro __before_compile__(_env) do

    quote do

      def asts do

        Enum.map(unquote(MetaAST).functions(__MODULE__), &%{&1 | vis: :crate})

      end

    end

  end

end