This is a mirror of http://www.vim.org/scripts/script.php?script_id=4781

Examples:

echo Rpn#Eval( '2 3 +' )
Or
echo Rpn#Eval( 2, 3, '+' )

Suggested command:
com! -nargs=+ Rpn echo Rpn#Eval( <f-args> )

Then, Rpn 2 3 + echoes the result.

Operators:
+
-
*
/
%
^

Commands:
d: duplicate last entry
r: reverse last two entries
v: square root the last entry

Special:
ans: Replaces with the answer from the last entry