mirror of
https://github.com/urbit/shrub.git
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166 lines
4.3 KiB
Plaintext
166 lines
4.3 KiB
Plaintext
!::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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:::::: :::::: Preface ::::::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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?> ?=(@ .) :: atom subject
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%. . :: fun with subject
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|= cud=@ :: call it cud
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=- (mul:all 2 cud) :: multiply by 2
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^= all :: assemble engine
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=~ :: volume stack
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%164 :: version constant
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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:::::: :::::: volume 0, version stub ::::::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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~% %k.164 ~ ~ ::
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|% ::
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++ stub 164 :: version stub
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-- ::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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:::::: :::::: volume 1, Hoon models ::::::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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~% %mood
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+
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~
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|% ::
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++ axis ,@ :: tree address
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-- ::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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:::::: :::::: volume 2, Hoon libraries and compiler ::::::
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:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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~% %hoon
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+
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==
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%dec dec
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==
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|%
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::::::::::::::::::::::::::::::::::::::::::::::::::::: ::
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:::: chapter 2a, basic unsigned math ::::
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:: ::::::::::::::::::::::::::::::::::::::::::::::::::::::
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++ add :: add
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~/ %add
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|= [a=@ b=@]
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^- @
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?: =(0 a)
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b
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$(a (dec a), b +(b))
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::
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++ cap :: tree head
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~/ %cap
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|= a=@
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^- ?(%2 %3)
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?- a
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%2 %2
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%3 %3
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?(%0 %1) !!
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* $(a (div a 2))
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==
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::
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++ dec :: decrement
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~/ %dec
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|= a=@
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?< =(0 a)
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=+ b=0
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|- ^- @
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?: =(a +(b))
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b
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$(b +(b))
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::
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++ div :: divide
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~/ %div
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|= [a=@ b=@]
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^- @
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?< =(0 b)
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=+ c=0
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|-
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?: (lth a b)
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c
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$(a (sub a b), c +(c))
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::
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++ gte :: greater-equal
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~/ %gte
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|= [a=@ b=@]
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^- ?
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!(lth a b)
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::
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++ gth :: greater-than
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~/ %gth
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|= [a=@ b=@]
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^- ?
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!(lte a b)
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::
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++ lte :: less-equal
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~/ %lte
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|= [a=@ b=@]
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|(=(a b) (lth a b))
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::
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++ lth :: less-than
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~/ %lth
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|= [a=@ b=@]
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^- ?
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&(!=(a b) |-(|(=(0 a) &(!=(0 b) $(a (dec a), b (dec b))))))
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::
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++ mas :: tree body
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~/ %mas
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|= a=@
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^- @
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?- a
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1 !!
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2 1
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3 1
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* (add (mod a 2) (mul $(a (div a 2)) 2))
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==
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::
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++ max :: maximum
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~/ %max
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|= [a=@ b=@]
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^- @
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?: (gth a b)
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a
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b
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::
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++ min :: minimum
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~/ %min
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|= [a=@ b=@]
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^- @
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?: (lth a b)
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a
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b
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::
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++ mod :: remainder
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~/ %mod
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|= [a=@ b=@]
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^- @
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?< =(0 b)
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(sub a (mul b (div a b)))
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::
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++ mul :: multiply
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~/ %mul
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|= [a=@ b=@]
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^- @
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=+ c=0
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|-
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?: =(0 a)
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c
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$(a (dec a), c (add b c))
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::
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++ peg :: tree connect
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~/ %peg
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|= [a=@ b=@]
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^- @
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?- b
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1 a
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2 (mul a 2)
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3 +((mul a 2))
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* (add (mod b 2) (mul $(b (div b 2)) 2))
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==
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::
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++ sub :: subtract
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~/ %sub
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|= [a=@ b=@]
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^- @
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?: =(0 b)
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a
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$(a (dec a), b (dec b))
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--
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. ==
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