117 lines
2.6 KiB
Factor
117 lines
2.6 KiB
Factor
! Copyright (C) 2007, 2009 Chris Double, Doug Coleman, Eduardo
|
|
! Cavazos, Slava Pestov.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: kernel kernel.private sequences sequences.private math
|
|
combinators macros math.order math.ranges quotations fry effects
|
|
memoize.private arrays ;
|
|
IN: generalizations
|
|
|
|
<<
|
|
|
|
ALIAS: n*quot (n*quot)
|
|
|
|
: repeat ( n obj quot -- ) swapd times ; inline
|
|
|
|
>>
|
|
|
|
MACRO: nsum ( n -- )
|
|
1 - [ + ] n*quot ;
|
|
|
|
MACRO: npick ( n -- )
|
|
1 - [ dup ] [ '[ _ dip swap ] ] repeat ;
|
|
|
|
MACRO: nover ( n -- )
|
|
dup 1 + '[ _ npick ] n*quot ;
|
|
|
|
MACRO: ndup ( n -- )
|
|
dup '[ _ npick ] n*quot ;
|
|
|
|
MACRO: dupn ( n -- )
|
|
[ [ drop ] ]
|
|
[ 1 - [ dup ] n*quot ] if-zero ;
|
|
|
|
MACRO: nrot ( n -- )
|
|
1 - [ ] [ '[ _ dip swap ] ] repeat ;
|
|
|
|
MACRO: -nrot ( n -- )
|
|
1 - [ ] [ '[ swap _ dip ] ] repeat ;
|
|
|
|
MACRO: ndrop ( n -- )
|
|
[ drop ] n*quot ;
|
|
|
|
MACRO: nnip ( n -- )
|
|
'[ [ _ ndrop ] dip ] ;
|
|
|
|
MACRO: ndip ( n -- )
|
|
[ [ dip ] curry ] n*quot [ call ] compose ;
|
|
|
|
MACRO: nkeep ( n -- )
|
|
dup '[ [ _ ndup ] dip _ ndip ] ;
|
|
|
|
MACRO: ncurry ( n -- )
|
|
[ curry ] n*quot ;
|
|
|
|
MACRO: nwith ( n -- )
|
|
[ with ] n*quot ;
|
|
|
|
MACRO: nbi ( n -- )
|
|
'[ [ _ nkeep ] dip call ] ;
|
|
|
|
MACRO: ncleave ( quots n -- )
|
|
[ '[ _ '[ _ _ nkeep ] ] map [ ] join ] [ '[ _ ndrop ] ] bi
|
|
compose ;
|
|
|
|
MACRO: nspread ( quots n -- )
|
|
over empty? [ 2drop [ ] ] [
|
|
[ [ but-last ] dip ]
|
|
[ [ last ] dip ] 2bi
|
|
swap
|
|
'[ [ _ _ nspread ] _ ndip @ ]
|
|
] if ;
|
|
|
|
MACRO: spread* ( n -- )
|
|
[ [ ] ] [
|
|
[1,b) [ '[ [ [ _ ndip ] curry ] dip compose ] ] map [ ] concat-as
|
|
[ call ] compose
|
|
] if-zero ;
|
|
|
|
MACRO: nspread* ( m n -- )
|
|
[ drop [ ] ] [
|
|
[ * 0 ] [ drop neg ] 2bi
|
|
<range> rest >array dup length iota <reversed>
|
|
[
|
|
'[ [ [ _ ndip ] curry ] _ ndip ]
|
|
] 2map dup rest-slice [ [ compose ] compose ] map! drop
|
|
[ ] concat-as [ call ] compose
|
|
] if-zero ;
|
|
|
|
MACRO: cleave* ( n -- )
|
|
[ [ ] ]
|
|
[ 1 - [ [ [ keep ] curry ] dip compose ] n*quot [ call ] compose ]
|
|
if-zero ;
|
|
|
|
: napply ( quot n -- )
|
|
[ dupn ] [ spread* ] bi ; inline
|
|
|
|
: mnapply ( quot m n -- )
|
|
[ nip dupn ] [ nspread* ] 2bi ; inline
|
|
|
|
: apply-curry ( a... quot n -- )
|
|
[ [curry] ] dip napply ; inline
|
|
|
|
: cleave-curry ( a quot... n -- )
|
|
[ [curry] ] swap [ napply ] [ cleave* ] bi ; inline
|
|
|
|
: spread-curry ( a... quot... n -- )
|
|
[ [curry] ] swap [ napply ] [ spread* ] bi ; inline
|
|
|
|
MACRO: mnswap ( m n -- )
|
|
1 + '[ _ -nrot ] swap '[ _ _ napply ] ;
|
|
|
|
MACRO: nweave ( n -- )
|
|
[ dup iota <reversed> [ '[ _ _ mnswap ] ] with map ] keep
|
|
'[ _ _ ncleave ] ;
|
|
|
|
MACRO: nbi-curry ( n -- )
|
|
[ bi-curry ] n*quot ;
|