Can't get automated c++ docstrings to work

Question

I stumbled this thread and at first, it seems glorious, but I simply cannot get it to work. So when I try it on any program e.g.:

#include <iostream>

bool helloWorld(int a,int b){
    dox<tab>
    std::cout << a << b << std::endl;
    return true
}

int main(){
std::cout << helloWorld(123, 321) std::endl;
return 0;
}

even though I have semantic-, doxy- and yas-mode enabled, it returns:

function: main (start)
[yas] Error running #[128 \302\300\303\301""\207 [eval ((progn (unless 
    (and (fboundp (quote semantic-current-tag)) semantic-mode) 
    (error Semantic required to use dox snippet)) (let ((tag 
    (senator-next-tag))) (while (or (null tag) (not (semantic-tag-of-class-p 
    tag (quote function)))) (setq tag (senator-next-tag))) (let* ((name 
    (semantic-tag-name tag)) (attrs (semantic-tag-attributes tag)) 
    (args (plist-get attrs :arguments)) (return-name (plist-get attrs :type)) 
    (idx 1)) (if (listp return-name) (setq return-name (car return-name))) 
    (yas/expand-snippet (format /**
* @brief ${1:%s}
*
%s
%s*/
name (mapconcat (lambda (x) (format * @param %s ${%d:Description of %s} (car x) 
    (incf idx) (car x))) args 
) (if (and return-name (not (string-equal void return-name))) 
    (format  * @return ${%d:%s}
(incf idx) return-name) ))))))) apply append] 6 

(fn &rest ARGS2)]: Symbol’s function definition is void: incf

I'm currently running ubuntu 16.04 and emacs25

Answer 1

Symbol’s function definition is void: incf

You can replace the incf calls in the snippet with cl-incf, or M-x load-library RET cl RET.

incf is an alias for ‘cl-incf’ in ‘cl.el’.

By the way, I think the dox is supposed to be expanded from above the function, not inside it.

Answer 2

So investigated a little and found the answer here which is to include the Common Lisp functions with

(require 'cl)

in the .emacs file, or init.el if you are into that one insead.