1 ! (c)2010 Joe Groff bsd license
2 USING: accessors assocs hashtables hashtables.wrapped kernel
4 IN: hashtables.identity
8 TUPLE: identity-wrapper
9 { underlying read-only } identity-hashcode ;
11 : <identity-wrapper> ( wrapped-key -- identity-wrapper )
12 dup identity-hashcode identity-wrapper boa ; inline
14 M: identity-wrapper equal?
15 over identity-wrapper?
16 [ [ underlying>> ] bi@ eq? ]
17 [ 2drop f ] if ; inline
19 M: identity-wrapper hashcode* nip identity-hashcode>> ; inline
23 TUPLE: identity-hashtable < wrapped-hashtable ;
25 : <identity-hashtable> ( n -- ihashtable )
26 <hashtable> identity-hashtable boa ; inline
28 M: identity-hashtable wrap-key drop <identity-wrapper> ;
30 M: identity-hashtable clone
31 underlying>> clone identity-hashtable boa ; inline
33 : identity-associate ( value key -- ihashtable )
34 2 <identity-hashtable> [ set-at ] keep ; inline
36 : >identity-hashtable ( assoc -- ihashtable )
37 [ assoc-size <identity-hashtable> ] keep assoc-union! ;
39 M: identity-hashtable assoc-like
40 drop dup identity-hashtable? [ >identity-hashtable ] unless ; inline
42 M: identity-hashtable new-assoc drop <identity-hashtable> ;
44 SYNTAX: IH{ \ } [ >identity-hashtable ] parse-literal ;
46 { "hashtables.identity" "prettyprint" } "hashtables.identity.prettyprint" require-when
47 { "hashtables.identity" "mirrors" } "hashtables.identity.mirrors" require-when