Elixir has macros which work by accepting AST as data and returning transformed AST structures. It's difficult to work with them, but there are plenty of langua

Elixir has macros which work by accepting AST as data and returning transformed AST structures. It's difficult to work with them, but there are plenty of languages that have first-class macros with more complex syntax. From [0]: defmacro unless(clause, do: expression) do quote do if(!unquote(clause), do: unquote(expression)) end end [0] https://elixir-lang.org/getting-started/meta/macros.html https://elixir-lang.org/getting-started/meta/macros.html