lqml/cpp-lib/readme.md

Build

Switch to cpp/ and do:

qmake lib.pro
make

Run

$ lqml ~/slime/qml-start-swank.lisp
$ emacs

In Slime do:

(defvar *cpp* (qload-c++ "cpp"))

(define-qt-wrappers *cpp*)

(hello *cpp* '(1 "two" (1.25 #(50 -50 75))))

Now look at the console output where you launched the lqml executable.

As you can see, although the argument and return type are simply defined as QVariant, you may also pass lists, because a QVariant can also be of type QVariantList, so this is a perfect fit for (nested) Lisp lists.

So, we pass a nested Lisp list, and it gets printed on Qt side with the respective types. Then the QVariantList is returend to Lisp, where it is automatically converted back to a nested Lisp list.

Realy convenient!