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use '$enqueue_attr_var' when adding attributes only

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This commit is contained in:
Mark Thom
2022-12-24 00:31:39 -07:00
parent 820011412b
commit aa7b8e52f3
1 changed files with 3 additions and 6 deletions
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9
src/lib/atts.pl
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@@ -41,8 +41,7 @@
( L \= Attr ->
nonvar(Ls),
'$get_from_list'(Ls, V, Attr)
; L = Attr,
'$enqueue_attr_var'(V)
; L = Attr
).
'$put_attr'(V, Attr) :-
@@ -65,8 +64,7 @@
nonvar(Att),
( Att \= Attr ->
'$del_attr_buried'(Ls0, Ls1, V, Attr)
; '$enqueue_attr_var'(V),
'$del_attr_head'(V),
; '$del_attr_head'(V),
'$del_attr'(Ls1, V, Attr)
).
@@ -84,8 +82,7 @@
; Ls1 = [Att | Ls2] ->
( Att \= Attr ->
'$del_attr_buried'(Ls1, Ls2, V, Attr)
; '$enqueue_attr_var'(V),
'$del_attr_non_head'(Ls0), %% set tail of Ls0 = tail of Ls1. can be undone by backtracking.
; '$del_attr_non_head'(Ls0), %% set tail of Ls0 = tail of Ls1. can be undone by backtracking.
'$del_attr_step'(Ls1, V, Attr)
)
).