>You can get far with inlining. You can also use libraries specifically built with this in mind. This implementation of parametric types for Common Lisp looks

>You can get far with inlining. You can also use libraries specifically built with this in mind. This implementation of parametric types for Common Lisp looks nice: https://github.com/cosmos72/cl-parametric-types https://github.com/cosmos72/cl-parametric-types It allows you to do templating which additionally declares the (parametrized) types, so the compiler can optimize accordingly. Worth a look.