Major Section: MISCELLANEOUS
None of the examples show the use of the variable
WORLD, which is
allowed in computed hints. There are some (undocumented) ACL2
utilities that might be useful in programming hints, but these
utilities need access to the ACL2 logical world (see world).
A very useful fact to know is that
(table-alist name world)
returns an alist representation of the current value of the
The ACL2 source code is littered with
functions for manipulating world. In our source code, the
world is usually bound a variable named
wrld; so searching
our code for that name might be helpful.
Using these utilities to look at the
WORLD one can, for example,
determine whether a symbol is defined recursively or not, get the
body and formals of a defined function, or fetch the statement of a
given lemma. Because these utilities are not yet documented, we do
not expect users to employ
WORLD in computed hints. But experts
might and it might lead to the formulation of a more convenient
language for computed hints.
If you start using computed hints extensively, please contact the
developers of ACL2 and let us know what you are doing with them and
how we can help.