circular-wrap (>>start) ;
: rotate-circular ( circular -- )
- [ start>> 1 + ] keep circular-wrap (>>start) ;
+ [ 1 ] dip change-circular-start ;
: push-circular ( elt circular -- )
- [ set-first ] [ 1 swap change-circular-start ] bi ;
+ [ set-first ] [ rotate-circular ] bi ;
: <circular-string> ( n -- circular )
0 <string> <circular> ;
M: growing-circular length length>> ;
<PRIVATE
+
: full? ( circular -- ? )
[ length ] [ seq>> length ] bi = ;
-: set-peek ( elt seq -- )
- [ length 1- ] keep set-nth ;
PRIVATE>
: push-growing-circular ( elt circular -- )
dup full? [ push-circular ]
- [ [ 1+ ] change-length set-peek ] if ;
+ [ [ 1 + ] change-length set-last ] if ;
: <growing-circular> ( capacity -- growing-circular )
{ } new-sequence 0 0 growing-circular boa ;