diff options
Diffstat (limited to 'src/interp/sys-utility.boot')
| -rw-r--r-- | src/interp/sys-utility.boot | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/interp/sys-utility.boot b/src/interp/sys-utility.boot index b6c0ba0e..1b404d9b 100644 --- a/src/interp/sys-utility.boot +++ b/src/interp/sys-utility.boot @@ -120,28 +120,28 @@ CONTAINED(x,y) == main where cons? y => eq(x, first y) or eq(x, rest y) symbolEq?(x,y) equal(x,y) == - atom y => x = y + y isnt [.,:.] => x = y equal(x, first y) or equal(x, rest y) ++ Returns all the keys of association list `x' -- ??? Should not this be named `alistAllKeys'? ASSOCLEFT: %Thing -> %Thing ASSOCLEFT x == - atom x => x + x isnt [.,:.] => x [first p for p in x] ++ Returns all the datums of association list `x'. -- ??? Should not this be named `alistAllValues'? ASSOCRIGHT: %Thing -> %Thing ASSOCRIGHT x == - atom x => x + x isnt [.,:.] => x [rest p for p in x] ++ Put the association list pair `(x . y)' into `l', erasing any ++ previous association for `x'. ADDASSOC: (%Thing,%Thing,%Alist(%Thing,%Thing)) -> %Alist(%Thing,%Thing) ADDASSOC(x,y,l) == - atom l => [[x,:y],:l] + l isnt [.,:.] => [[x,:y],:l] x = first first l => [[x,:y],:rest l] [first l,:ADDASSOC(x,y,rest l)] @@ -149,7 +149,7 @@ ADDASSOC(x,y,l) == ++ Remove any assocation pair `(u . x)' from list `v'. DELLASOS: (%Thing,%Alist(%Thing,%Thing)) -> %Alist(%Thing,%Thing) DELLASOS(u,v) == - atom v => nil + v isnt [.,:.] => nil u = first first v => rest v [first v,:DELLASOS(u,rest v)] @@ -158,14 +158,14 @@ DELLASOS(u,v) == -- ??? Should not this be named `alistValue'? LASSOC: (%Thing,%Alist(%Thing,%Thing)) -> %Thing LASSOC(x,y) == - atom y => nil + y isnt [.,:.] => nil x = first first y => rest first y LASSOC(x,rest y) ++ Return the key associated with datum `x' in association list `y'. rassoc: (%Thing,%Alist(%Thing,%Thing)) -> %Thing rassoc(x,y) == - atom y => nil + y isnt [.,:.] => nil x = rest first y => first first y rassoc(x,rest y) |