When extending pandoc (or Quarto) with Lua filters, we interact with so-called Lua userdata objects. These objects are used to wrap document AST elements, making them accessible from Lua scripts. They mostly behave like normal Lua tables. This post is intended as a quick overview, listing interesting properties of userdata objects.

When extending pandoc (or Quarto) with Lua filters, we interact with so-called Lua userdata objects. These objects are used to wrap document AST elements, making them accessible from Lua scripts. They mostly behave like normal Lua tables. This post is intended as a quick overview, listing interesting properties of userdata objects.