Insert Key into the set. If a variant (see =@=/2) of Key is
already in the set, the set is unchanged and New is unified with
false. Otherwise, New is unified with true and a copy ofKey is added to the set.
To be done
- Computing the hash for cyclic terms is performed with
the help of term_factorized/3, which performs rather
Tag confusing pages with doc-needs-help|Tags are associated to your profile if you are logged in