1 ! Copyright (C) 2006, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel math math.parser math.order namespaces make
4 sequences strings words assocs combinators accessors arrays
10 { out array read-only }
11 { terminated? read-only } ;
13 : <effect> ( in out -- effect )
14 dup { "*" } = [ drop { } t ] [ f ] if
17 : effect-height ( effect -- n )
18 [ out>> length ] [ in>> length ] bi - ; inline
20 : effect<= ( effect1 effect2 -- ? )
22 { [ over terminated?>> ] [ t ] }
23 { [ dup terminated?>> ] [ f ] }
24 { [ 2dup [ in>> length ] bi@ > ] [ f ] }
25 { [ 2dup [ effect-height ] bi@ = not ] [ f ] }
29 : effect= ( effect1 effect2 -- ? )
30 [ [ in>> length ] bi@ = ]
31 [ [ out>> length ] bi@ = ]
32 [ [ terminated?>> ] bi@ = ]
35 GENERIC: effect>string ( obj -- str )
36 M: string effect>string ;
37 M: object effect>string drop "object" ;
38 M: word effect>string name>> ;
39 M: integer effect>string number>string ;
40 M: pair effect>string first2 [ effect>string ] bi@ ": " glue ;
42 : stack-picture ( seq -- string )
43 [ [ effect>string % CHAR: \s , ] each ] "" make ;
45 M: effect effect>string ( effect -- string )
48 [ in>> stack-picture % "-- " % ]
49 [ out>> stack-picture % ]
50 [ terminated?>> [ "* " % ] when ]
55 GENERIC: effect>type ( obj -- type )
56 M: object effect>type drop object ;
58 M: pair effect>type second effect>type ;
60 : effect-in-types ( effect -- input-types )
61 in>> [ effect>type ] map ;
63 : effect-out-types ( effect -- input-types )
64 out>> [ effect>type ] map ;
66 GENERIC: stack-effect ( word -- effect/f )
69 [ "declared-effect" word-prop ]
70 [ parent-word dup [ stack-effect ] when ] bi or ;
72 M: deferred stack-effect call-next-method (( -- * )) or ;
75 [ in>> clone ] [ out>> clone ] bi <effect> ;
77 : stack-height ( word -- n )
78 stack-effect effect-height ;
80 : split-shuffle ( stack shuffle -- stack1 stack2 )
83 : shuffle-mapping ( effect -- mapping )
84 [ out>> ] [ in>> ] bi [ index ] curry map ;
86 : shuffle ( stack shuffle -- newstack )
87 shuffle-mapping swap nths ;
89 : add-effect-input ( effect -- effect' )
90 [ in>> "obj" suffix ] [ out>> ] [ terminated?>> ] tri effect boa ;
92 : compose-effects ( effect1 effect2 -- effect' )
96 [ [ [ in>> length ] [ out>> length ] bi ] [ in>> length ] bi* swap [-] + ]
97 [ [ out>> length ] [ [ in>> length ] [ out>> length ] bi ] bi* [ [-] ] dip + ]
98 [ nip terminated?>> ] 2tri
99 [ [ "x" <array> ] bi@ ] dip