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-rw-r--r--src/boot/ast.boot.pamphlet5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/boot/ast.boot.pamphlet b/src/boot/ast.boot.pamphlet
index 2d0b7e64..02c99679 100644
--- a/src/boot/ast.boot.pamphlet
+++ b/src/boot/ast.boot.pamphlet
@@ -444,6 +444,11 @@ bfSUBLIS(p,e)==
EQCAR(e,"QUOTE")=>e
cons(bfSUBLIS(p,car e),bfSUBLIS(p,cdr e))
++++ Returns e/p, where e is an atom. We assume that the
++++ DEFs form a system admitting a fix point; otherwise we may
++++ loop forever. That can happen only if nullary goats
++++ are recursive -- which they are not supposed to be.
++++ We don't enforce that restriction though.
bfSUBLIS1(p,e)==
null p =>e
f:=CAR p