Amsterdam |> Elixir (10-09-2019) (see also: https://github.com/archan937/clustorage)

1.simple-examples.ex

# iex(1)>
ast = quote do: 1 + 1

# iex(2)>
Code.eval_quoted(ast)

# iex(3)>
ast = quote do: sum(1, 2 + 3)

# iex(4)>
ast = quote do: fn(a, b) -> a * b end

# iex(5)> 
{func, []} = Code.eval_quoted(ast)

# iex(6)>
func.(2, 4)

2.ast.ex

defmodule AST do

  def compile(module) do
    module
    |> generate()
    |> Code.compile_quoted()
  end

  def generate(module) do
    quote do
      defmodule unquote(module) do
        def say_hi(name) do
          IO.puts("Hi, " <> name)
        end
      end
    end
  end

end

3.ast-examples.ex

# iex(1)> 
# [ Paste AST module ]

# iex(2)> 
# Generate AST module for the module `Paul.Engel`
ast = AST.generate(Paul.Engel)

# iex(3)>
# Print the generated AST to Elixir code
ast |> Macro.to_string() |> IO.puts()

# iex(4)>
# Compile the generated AST
[{mod, binary}] = Code.compile_quoted(ast)

# iex(5)>
# Ask Paul.Engel to say hi ;)
Paul.Engel.say_hi("stranger")