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-rw-r--r--src/interp/category.boot.pamphlet6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/interp/category.boot.pamphlet b/src/interp/category.boot.pamphlet
index 88c1c635..0dfa2b45 100644
--- a/src/interp/category.boot.pamphlet
+++ b/src/interp/category.boot.pamphlet
@@ -601,6 +601,12 @@ JoinInner(l,$e) ==
if pName and not member(pName,c) then c:= [pName,:c]
$NewCatVec.4:= [c,FundamentalAncestors,CADDR $NewCatVec.4]
mkCategory("domain",sigl,attl,globalDomains,$NewCatVec)
+
+Join(:l) ==
+ e :=
+ (not BOUNDP '$e) or null $e or $InteractiveMode => $CategoryFrame
+ $e
+ JoinInner(l, e)
--ProduceDomainAlist(u,e) ==
-- -- Gives a complete Alist for all the functions in the Domain