167 lines
3.7 KiB
Factor
Executable File
167 lines
3.7 KiB
Factor
Executable File
! Copyright (C) 2004, 2007 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel.private ;
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IN: kernel
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: version ( -- str ) "0.92" ; foldable
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! Stack stuff
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: spin ( x y z -- z y x ) swap rot ; inline
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: roll ( x y z t -- y z t x ) >r rot r> swap ; inline
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: -roll ( x y z t -- t x y z ) swap >r -rot r> ; inline
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: 2over ( x y z -- x y z x y ) pick pick ; inline
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: clear ( -- ) { } set-datastack ;
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! Combinators
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: call ( callable -- ) uncurry (call) ;
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DEFER: if
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: ? ( ? true false -- true/false )
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#! 'if' and '?' can be defined in terms of each other
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#! because the JIT special-cases an 'if' preceeded by
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#! two literal quotations.
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rot [ drop ] [ nip ] if ; inline
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: if ( ? true false -- ) ? call ;
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: if* ( cond true false -- )
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pick [ drop call ] [ 2nip call ] if ; inline
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: ?if ( default cond true false -- )
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pick [ roll 2drop call ] [ 2nip call ] if ; inline
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: unless ( cond false -- )
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swap [ drop ] [ call ] if ; inline
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: unless* ( cond false -- )
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over [ drop ] [ nip call ] if ; inline
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: when ( cond true -- )
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swap [ call ] [ drop ] if ; inline
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: when* ( cond true -- )
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over [ call ] [ 2drop ] if ; inline
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: slip ( quot x -- x ) >r call r> ; inline
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: 2slip ( quot x y -- x y ) >r >r call r> r> ; inline
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: 3slip ( quot x y z -- x y z ) >r >r >r call r> r> r> ; inline
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: dip ( obj quot -- obj ) swap slip ; inline
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: keep ( x quot -- x ) over slip ; inline
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: 2keep ( x y quot -- x y ) 2over 2slip ; inline
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: 3keep ( x y z quot -- x y z )
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>r 3dup r> -roll 3slip ; inline
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: 2apply ( x y quot -- ) tuck 2slip call ; inline
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: while ( pred body tail -- )
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>r >r dup slip r> r> roll
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[ >r tuck 2slip r> while ]
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[ 2nip call ] if ; inline
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! Quotation building
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: 2curry ( obj1 obj2 quot -- curry )
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curry curry ; inline
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: 3curry ( obj1 obj2 obj3 quot -- curry )
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curry curry curry ; inline
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: with ( param obj quot -- obj curry )
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swapd [ swapd call ] 2curry ; inline
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: compose ( quot1 quot2 -- curry )
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! Not inline because this is treated as a primitive by
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! the compiler
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[ slip call ] 2curry ;
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: 3compose ( quot1 quot2 quot3 -- curry )
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[ 2slip slip call ] 3curry ; inline
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! Object protocol
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GENERIC: delegate ( obj -- delegate )
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M: object delegate drop f ;
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GENERIC: set-delegate ( delegate tuple -- )
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GENERIC: hashcode* ( depth obj -- code )
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M: object hashcode* 2drop 0 ;
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: hashcode ( obj -- code ) 3 swap hashcode* ; inline
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GENERIC: equal? ( obj1 obj2 -- ? )
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M: object equal? 2drop f ;
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: = ( obj1 obj2 -- ? )
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2dup eq? [ 2drop t ] [ equal? ] if ; inline
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GENERIC: <=> ( obj1 obj2 -- n )
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GENERIC: clone ( obj -- cloned )
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M: object clone ;
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M: callstack clone (clone) ;
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! Tuple construction
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GENERIC# get-slots 1 ( tuple slots -- ... )
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GENERIC# set-slots 1 ( ... tuple slots -- )
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GENERIC: construct-empty ( class -- tuple )
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GENERIC: construct ( ... slots class -- tuple ) inline
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GENERIC: construct-boa ( ... class -- tuple )
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: construct-delegate ( delegate class -- tuple )
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>r { set-delegate } r> construct ; inline
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! Booleans
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: not ( obj -- ? ) f eq? ; inline
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: >boolean ( obj -- ? ) t f ? ; inline
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: and ( obj1 obj2 -- ? ) over ? ; inline
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: or ( obj1 obj2 -- ? ) dupd ? ; inline
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: xor ( obj1 obj2 -- ? ) dup not swap ? ; inline
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: both? ( x y quot -- ? ) 2apply and ; inline
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: either? ( x y quot -- ? ) 2apply or ; inline
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: compare ( obj1 obj2 quot -- n ) 2apply <=> ; inline
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: most ( x y quot -- z )
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>r 2dup r> call [ drop ] [ nip ] if ; inline
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! Error handling -- defined early so that other files can
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! throw errors before continuations are loaded
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: throw ( error -- * ) 5 getenv [ die ] or curry (throw) ;
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<PRIVATE
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: declare ( spec -- ) drop ;
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: do-primitive ( number -- ) "Improper primitive call" throw ;
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PRIVATE>
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