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zig_parser

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a zig parser in elixir

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zig_parser lib zig.parser union.ex
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lib/zig.parser/union.ex 

defmodule Zig.Parser.Union do

  defstruct [:location, :tag, packed: false, extern: false, decls: [], fields: %{}]



  def parse([:LPAREN, tagtype, :RPAREN | rest]), do: %{parse(rest) | tag: tagtype}



  def parse([:LBRACE | rest]), do: do_parse(%__MODULE__{}, rest)



  defp do_parse(struct, [name, :COLON, type | rest]) do

    struct

    |> Map.update!(:fields, &Map.put(&1, name, type))

    |> do_parse(rest)

  end



  defp do_parse(struct, [:RBRACE]) do

    Map.update!(struct, :decls, &Enum.reverse/1)

  end



  defp do_parse(struct, [decl | rest]) do

    struct

    |> Map.update!(:decls, &[decl | &1])

    |> do_parse(rest)

  end

end