factor/core/kernel/kernel.factor

156 lines
3.4 KiB
Factor

! Copyright (C) 2004, 2007 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel.private ;
IN: kernel
: version ( -- str ) "0.91" ; foldable
! Stack stuff
: roll ( x y z t -- y z t x ) >r rot r> swap ; inline
: -roll ( x y z t -- t x y z ) swap >r -rot r> ; inline
: clear ( -- ) { } set-datastack ;
! Combinators
: call ( callable -- ) uncurry (call) ;
DEFER: if
: ? ( ? true false -- true/false )
#! 'if' and '?' can be defined in terms of each other
#! because the JIT special-cases an 'if' preceeded by
#! two literal quotations.
rot [ drop ] [ nip ] if ; inline
: if ( ? true false -- ) ? call ;
: if* ( cond true false -- )
pick [ drop call ] [ 2nip call ] if ; inline
: ?if ( default cond true false -- )
pick [ roll 2drop call ] [ 2nip call ] if ; inline
: unless ( cond false -- )
swap [ drop ] [ call ] if ; inline
: unless* ( cond false -- )
over [ drop ] [ nip call ] if ; inline
: when ( cond true -- )
swap [ call ] [ drop ] if ; inline
: when* ( cond true -- )
over [ call ] [ 2drop ] if ; inline
: slip ( quot x -- x ) >r call r> ; inline
: 2slip ( quot x y -- x y ) >r >r call r> r> ; inline
: 3slip ( quot x y z -- x y z ) >r >r >r call r> r> r> ; inline
: dip ( obj callable -- obj ) swap slip ; inline
: keep ( x quot -- x ) over slip ; inline
: 2keep ( x y quot -- x y ) pick pick 2slip ; inline
: 3keep ( x y z quot -- x y z )
>r 3dup r> -roll 3slip ; inline
: 2apply ( x y quot -- ) tuck 2slip call ; inline
! Quotation building
: 2curry ( obj1 obj2 quot -- curry )
curry curry ; inline
: 3curry ( obj1 obj2 obj3 quot -- curry )
curry curry curry ; inline
: curry* ( param obj quot -- obj curry )
swapd [ swapd call ] 2curry ; inline
: compose ( quot1 quot2 -- curry )
! Not inline because this is treated as a primitive by
! the compiler
[ slip call ] 2curry ;
: 3compose ( quot1 quot2 quot3 -- curry )
[ 2slip slip call ] 3curry ; inline
! Object protocol
GENERIC: delegate ( obj -- delegate )
M: object delegate drop f ;
GENERIC: set-delegate ( delegate tuple -- )
GENERIC: hashcode* ( depth obj -- code )
M: object hashcode* 2drop 0 ;
: hashcode ( obj -- code ) 3 swap hashcode* ; inline
GENERIC: equal? ( obj1 obj2 -- ? )
M: object equal? 2drop f ;
: = ( obj1 obj2 -- ? )
2dup eq? [ 2drop t ] [ equal? ] if ; inline
GENERIC: <=> ( obj1 obj2 -- n )
GENERIC: clone ( obj -- cloned )
M: object clone ;
M: callstack clone (clone) ;
! Tuple construction
GENERIC# get-slots 1 ( tuple slots -- ... )
GENERIC# set-slots 1 ( ... tuple slots -- )
GENERIC: construct-empty ( class -- tuple )
GENERIC: construct ( ... slots class -- tuple ) inline
GENERIC: construct-boa ( ... class -- tuple )
: construct-delegate ( delegate class -- tuple )
>r { set-delegate } r> construct ; inline
! Booleans
: not ( obj -- ? ) f eq? ; inline
: >boolean ( obj -- ? ) t f ? ; inline
: and ( obj1 obj2 -- ? ) over ? ; inline
: or ( obj1 obj2 -- ? ) dupd ? ; inline
: xor ( obj1 obj2 -- ? ) dup not swap ? ; inline
: both? ( x y quot -- ? ) 2apply and ; inline
: either? ( x y quot -- ? ) 2apply or ; inline
: compare ( obj1 obj2 quot -- n ) 2apply <=> ; inline
: most ( x y quot -- z )
>r 2dup r> call [ drop ] [ nip ] if ; inline
! Error handling -- defined early so that other files can
! throw errors before continuations are loaded
: throw ( error -- * ) 5 getenv [ die ] or curry (throw) ;
<PRIVATE
: declare ( spec -- ) drop ;
PRIVATE>