And below an Aldor version of the Fibonacci function that resembles a definition done in Haskell.

(1) -> <aldor>
#include "axiom"
Z ==> Integer;
ZZ ==> Z -> Z;
-- Haskell
-- fiblist = 1 : 1 : (zipWith (+) fiblist (tail fiblist))
import from Z;
zipWith(op: (Z,Z)->Z, f: ZZ, g: ZZ)(x: Z): Z == op(f x, g x);
apply(z: Z, zz: ZZ)(x: Z): Z == if zero? x then z else zz(x-1);
tail(zz: ZZ)(x: Z): Z == zz(x+1);

fib(x: Z): Z == (1 1 zipWith(+, fib, tail fib)) x;</aldor>

Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1094142832394199181-25px001.as
      using Aldor compiler and options 
-O -Fasy -Fao -Flsp -lfricas -Mno-ALDOR_W_WillObsolete -DFriCAS -Y $FRICAS/algebra -I $FRICAS/algebra
      Use the system command )set compiler args to change these 
      options.
"/var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1094142832394199181-25px001.as", line 1: 
#include "axiom"
^
[L1 C1] #1 (Error) Could not open file `axiom'.

   The )library system command was not called after compilation.

[fib n for n in 1..10]

   There are no library operations named fib 
      Use HyperDoc Browse or issue
                                )what op fib
      to learn if there is any operation containing " fib " in its 
      name.
   Cannot find a definition or applicable library operation named fib 
      with argument type(s) 
                               PositiveInteger

      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.
   FriCAS will attempt to step through and interpret the code.
   There are no library operations named fib 
      Use HyperDoc Browse or issue
                                )what op fib
      to learn if there is any operation containing " fib " in its 
      name.

   Cannot find a definition or applicable library operation named fib 
      with argument type(s) 
                               PositiveInteger

      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.

And here the same program written for Aldor without PanAxiom. Compile and run as follows: aldor -laldor -fx fib.as && ./fib

#include "aldor"
#include "aldorio"

Z ==> Integer;
ZZ ==> Z -> Z;

import from Z;
zipWith(op: (Z,Z)->Z, f: ZZ, g: ZZ)(x: Z): Z == op(f x, g x);
apply(z: Z, zz: ZZ)(x: Z): Z == if zero? x then z else zz(x-1);
tail(zz: ZZ)(x: Z): Z == zz(x+1);

fib(x: Z): Z == (1 1 zipWith(+, fib, tail fib)) x;

main(): () == {
        import from List Z;
        stdout << [fib n for n in 1..10] << newline;
}

main();

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/5940177716537504213-25px003.as
      using Aldor compiler and options 
-O -Fasy -Fao -Flsp -lfricas -Mno-ALDOR_W_WillObsolete -DFriCAS -Y $FRICAS/algebra -I $FRICAS/algebra
      Use the system command )set compiler args to change these 
      options.
   Compiling Lisp source code from file 
      ./5940177716537504213-25px003.lsp
   Issuing )library command for 5940177716537504213-25px003
   Reading /var/aw/var/LatexWiki/5940177716537504213-25px003.asy
   zipWith is now explicitly exposed in frame initial 
   zipWith will be automatically loaded when needed from 
      /var/aw/var/LatexWiki/5940177716537504213-25px003
   apply is now explicitly exposed in frame initial 
   apply will be automatically loaded when needed from 
      /var/aw/var/LatexWiki/5940177716537504213-25px003
   tail is now explicitly exposed in frame initial 
   tail will be automatically loaded when needed from 
      /var/aw/var/LatexWiki/5940177716537504213-25px003
   fib is now explicitly exposed in frame initial 
   fib will be automatically loaded when needed from 
      /var/aw/var/LatexWiki/5940177716537504213-25px003
   main is now explicitly exposed in frame initial 
   main will be automatically loaded when needed from 
      /var/aw/var/LatexWiki/5940177716537504213-25px003