end
  defp section_body(:global, binary) do
    vec(&global/1).(binary)
  end
  defp global(binary) do
    {gl, rest} = globaltype(binary)
    {ex, rest} = expr(rest)
    {{gl, ex}, rest}

  defp globaltype(binary) do
    {vt, rest} = valtype(binary)
    {m, rest} = mut(rest)
    {{vt, m}, rest}
  end
  defp mut(<<0x00, rest::binary>>) do
    {:const, rest}
  end
  defp mut(<<0x01, rest::binary>>) do
    {:var, rest}
  end
  defp expr(binary) do
    expr(binary, [])
  end
  defp expr(<<0x0B, rest::binary>>, acc) do
    {acc |> Enum.reverse(), rest}
  end
  defp expr(<<0x41, rest::binary>>, acc) do
    {val, rest} = i32(rest)
    expr(rest, [{:"i32.const", val} | acc])
  end

    {val, rest}
  end
  defp i32(binary) do
    i32(binary, [])
  end
  defp i32(<<0::1, _::bitstring>> = binary, acc) do
    <<v::binary-size(1), rest::binary>> = binary
    val = [v | acc] |> Enum.reverse() |> Enum.into(<<>>)
    val = WaParser.LEB128.decode_signed(val)

  end
  defp i32(<<1::1, _::bitstring>> = binary, acc) do
    <<v::binary-size(1), rest::binary>> = binary
    i32(rest, [v | acc])