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Attempt to clarify docs for PR12793

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Jay McCarthy 2012-05-28 10:34:05 -06:00
parent e08c1f3ad1
commit c75360957c
1 changed files with 6 additions and 5 deletions
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11
collects/racklog/racklog.scrbl
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@ -1203,11 +1203,12 @@ Like @racket[(list (%which (V ...) G ...) (%more) ...)] with as many @racket[(%m
#:contracts ([V identifier?]
[E expression?]
[G goal/c])]{
Returns a predicate function.
Each clause @racket[C] signifies
that the goal created by applying the predicate object to
anything that matches @racket[(E ...)] is deemed to succeed if all
the goals @racket[G], ..., can, in their turn, be shown to succeed.}
Returns a predicate function. Each clause @racket[C] signifies that
the goal created by applying the predicate object to anything that
matches @racket[(E ...)] is deemed to succeed if all the goals
@racket[G], ..., can, in their turn, be shown to succeed. The
variables @racket[V], ..., are local logic variables for
@racket[clause], ....}
@defpred[(%empty-rel [E unifiable?] ...)]{
The goal @racket[(%empty-rel E ...)] always fails. The @emph{value}