[kazinator]

In TXR Lisp, I implemented an original invention of mine called Paremeter List Macros (Parameter Macros for short).

A parameter macro works in any lambda syntax. Methods, macros.

The documentation for Parameter List Macros shows an example implementation of rudimentary memoization.

https://www.nongnu.org/txr/txr-manpage.html#N-C9CAE162

You can use :memo in a method if you like, in a lambda expression, defmacro, macrolet, labels, ...: anywhere you have a lambda parameter list.

There is a predefined parameter macro called :key which implements keyword parameters. (Common-Lisp-like keyword parameters are not native to the language run-time at all: you have to use this param macro if you want them.)

Another predefined parameter macro called :match allows you to express a function with pattern matching. :match will take stock of your patterns and implicitly generate a parameter list which can take any of those patterns, and a function body which then further handles the cases.