Handle Pgvector itself in new/1 (#8)

lib/pgvector.ex

@@ -6,8 +6,12 @@ defmodule Pgvector do
  defstruct [:data]
 
  @doc """
- Creates a new vector from a list or tensor
+ Creates a new vector from a Pgvector or list or tensor
  """
+ def new(%Pgvector{} = pgvector) do
+ pgvector
+ end
+
  def new(list) when is_list(list) do
  dim = list |> length()
  bin = for v <- list, into: "", do: <<v::float-32>>

test/pgvector_test.exs

@@ -1,6 +1,11 @@
 defmodule PgvectorTest do
  use ExUnit.Case
 
+ test "pgvector" do
+ pgvector = Pgvector.new([1, 2, 3])
+ assert pgvector == pgvector |> Pgvector.new()
+ end
+
  test "list" do
  list = [1.0, 2.0, 3.0]
  assert list == list |> Pgvector.new() |> Pgvector.to_list()