A hard challenge anyone?

[Brian Yennie]

One other possible approach: use the "token" chunk... while there may  
still be caveats to getting exactly the information you want, it does  
a very good job of picking out the function names since it's based on  
the actual script parser.

repeat for each token t in "aFunction(bFunction(1)) + cFunction 
(dFunction(eFunction(fFunction(2))))"
   put t&cr after temp
end repeat
put temp

 >>
aFunction
(
bFunction
(
1
)
)
+
cFunction
(
dFunction
(
eFunction
(
fFunction
(
2
)
)
)
)
 >>