43 lines
1.0 KiB
Factor
43 lines
1.0 KiB
Factor
! Copyright (C) 2006, 2007 Slava Pestov.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: assocs kernel sequences sets ;
|
|
IN: graphs
|
|
|
|
<PRIVATE
|
|
|
|
: if-graph ( vertex edges graph quot -- )
|
|
dupd [ 3drop ] if ; inline
|
|
|
|
: nest ( key graph -- hash )
|
|
[ drop H{ } clone ] cache ; inline
|
|
|
|
PRIVATE>
|
|
|
|
: add-vertex ( vertex edges graph -- )
|
|
[ [ nest dupd set-at ] curry with each ] if-graph ; inline
|
|
|
|
: add-vertex* ( vertex edges graph -- )
|
|
[
|
|
swapd [ [ rot ] dip nest set-at ] 2curry assoc-each
|
|
] if-graph ; inline
|
|
|
|
: remove-vertex ( vertex edges graph -- )
|
|
[ [ at delete-at ] curry with each ] if-graph ; inline
|
|
|
|
: remove-vertex* ( vertex edges graph -- )
|
|
[
|
|
swapd [ [ rot ] dip at delete-at drop ] 2curry assoc-each
|
|
] if-graph ; inline
|
|
|
|
<PRIVATE
|
|
|
|
: (closure) ( obj set quot: ( elt -- seq ) -- )
|
|
2over ?adjoin [
|
|
[ dip ] keep [ (closure) ] 2curry each
|
|
] [ 3drop ] if ; inline recursive
|
|
|
|
PRIVATE>
|
|
|
|
: closure ( obj quot -- set )
|
|
HS{ } clone [ swap (closure) ] keep ; inline
|