! Copyright (C) 2007, 2008 Daniel Ehrenberg, Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
-USING: sequences kernel strings math fry ;
+USING: fry kernel make math sequences strings ;
IN: sequences.deep
! All traversal goes in postorder
[ call ] 2keep over branch?
[ '[ _ deep-each ] each ] [ 2drop ] if ; inline recursive
+: deep-reduce ( ... obj identity quot: ( ... prev elt -- ... next ) -- ... result )
+ swapd deep-each ; inline
+
: deep-map ( ... obj quot: ( ... elt -- ... elt' ) -- ... newobj )
[ call ] keep over branch?
[ '[ _ deep-map ] map ] [ drop ] if ; inline recursive
+: deep-filter-as ( ... obj quot: ( ... elt -- ... ? ) exemplar -- ... seq )
+ [ selector [ deep-each ] dip ] dip [ like ] when* ; inline recursive
+
: deep-filter ( ... obj quot: ( ... elt -- ... ? ) -- ... seq )
- over [ selector [ deep-each ] dip ] dip
- dup branch? [ like ] [ drop ] if ; inline recursive
+ over dup branch? [ drop f ] unless deep-filter-as ; inline
+
+: deep-reject-as ( ... obj quot: ( ... elt -- ... ? ) exemplar -- ... seq )
+ [ [ not ] compose ] dip deep-filter-as ; inline
+
+: deep-reject ( ... obj quot: ( ... elt -- ... ? ) -- ... seq )
+ [ not ] compose deep-filter ; inline
: (deep-find) ( ... obj quot: ( ... elt -- ... ? ) -- ... elt ? )
[ call ] 2keep rot [ drop t ] [
over branch? [
[ f ] 2dip '[ nip _ (deep-find) ] any?
- ] [ 2drop f f ] if
+ ] [ 2drop f f ] if
] if ; inline recursive
: deep-find ( ... obj quot: ( ... elt -- ... ? ) -- ... elt ) (deep-find) drop ; inline
_ swap dup branch? [ member? ] [ 2drop f ] if
] deep-find >boolean ;
-: deep-subseq? ( subseq seq -- ? )
- swap '[
- _ swap dup branch? [ subseq? ] [ 2drop f ] if
+: deep-subseq-of? ( seq subseq -- ? )
+ '[
+ _ over branch? [ subseq-of? ] [ 2drop f ] if
] deep-find >boolean ;
: deep-map! ( ... obj quot: ( ... elt -- ... elt' ) -- ... obj )
] [ drop ] if ; inline recursive
: flatten ( obj -- seq )
- [ branch? not ] deep-filter ;
+ [ branch? ] deep-reject ;
+
+: flatten-as ( obj exemplar -- seq )
+ [ branch? ] swap deep-reject-as ;
+
+: flatten1 ( obj -- seq )
+ [
+ [
+ dup branch? [
+ [ dup branch? [ % ] [ , ] if ] each
+ ] [ , ] if
+ ]
+ ] keep dup branch? [ drop f ] unless make ;