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fixes from hoosierEE

Jeremy Siek 4 years ago
parent
commit
4b189616ba
1 changed files with 1 additions and 1 deletions
  1. 1 1
      book.tex

+ 1 - 1
book.tex

@@ -8638,7 +8638,7 @@ Note that in both \key{inject} and
 which simplifies the implementation and corresponds with what is
 which simplifies the implementation and corresponds with what is
 needed for compiling untyped Racket. The type predicates,
 needed for compiling untyped Racket. The type predicates,
 $(\key{boolean?}\,e)$ etc., expect a tagged value and return \key{\#t}
 $(\key{boolean?}\,e)$ etc., expect a tagged value and return \key{\#t}
-if the tag corresponds to the predicate, and return \key{\#t}
+if the tag corresponds to the predicate, and return \key{\#f}
 otherwise.
 otherwise.
 %
 %
 Selections from the type checker for $R_6$ are shown in
 Selections from the type checker for $R_6$ are shown in