1 USING: kernel layouts math namespaces sequences sequences.private ;
5 dup most-negative-fixnum most-positive-fixnum between?
6 [ >fixnum ] [ >bignum ] if ;
8 TUPLE: range from length step ;
10 : <range> ( from to step -- range )
12 [ / 1+ 0 max >integer ] keep
15 M: range length ( seq -- n )
18 M: range nth-unsafe ( n range -- obj )
19 [ range-step * ] keep range-from + ;
21 INSTANCE: range immutable-sequence
23 : twiddle 2dup > -1 1 ? ; inline
25 : (a, dup roll + -rot ; inline
27 : ,b) dup neg rot + swap ; inline
29 : [a,b] twiddle <range> ;
31 : (a,b] twiddle (a, <range> ;
33 : [a,b) twiddle ,b) <range> ;
35 : (a,b) twiddle (a, ,b) <range> ;
37 : [0,b] 0 swap [a,b] ;
39 : [1,b] 1 swap [a,b] ;
41 : [0,b) 0 swap (a,b] ;