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Add firstn-unsafe, input<sequence-unsafe

db4
Slava Pestov 2009-04-26 21:22:06 -05:00
parent 6b5b839e72
commit 7094b78821
2 changed files with 10 additions and 3 deletions
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4
basis/combinators/smart/smart.factor
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@ -18,6 +18,10 @@ MACRO: input<sequence ( quot -- newquot )
[ infer in>> ] keep
'[ _ firstn @ ] ;
MACRO: input<sequence-unsafe ( quot -- newquot )
[ infer in>> ] keep
'[ _ firstn-unsafe @ ] ;
MACRO: reduce-outputs ( quot operation -- newquot )
[ dup infer out>> 1 [-] ] dip n*quot compose ;

9
basis/generalizations/generalizations.factor
View File

@ -26,11 +26,14 @@ MACRO: narray ( n -- )
MACRO: nsum ( n -- )
1- [ + ] n*quot ;
MACRO: firstn-unsafe ( n -- )
[ '[ [ _ ] dip nth-unsafe ] ] map '[ _ cleave ] ;
MACRO: firstn ( n -- )
dup zero? [ drop [ drop ] ] [
[ [ '[ [ _ ] dip nth-unsafe ] ] map ]
[ 1- '[ [ _ ] dip bounds-check 2drop ] ]
bi prefix '[ _ cleave ]
[ 1- swap bounds-check 2drop ]
[ firstn-unsafe ]
bi-curry '[ _ _ bi ]
] if ;
MACRO: npick ( n -- )