Sounds similar to what in Lisp is called a FEXPR. A concept which was widely used in the 70s and what has mostly been replaced by macros. Fexprs get the argumen

Sounds similar to what in Lisp is called a FEXPR. A concept which was widely used in the 70s and what has mostly been replaced by macros. Fexprs get the arguments unevaluated at runtime and then do runtime parsing/transforming/evaluation.