mirror of
https://github.com/urbit/shrub.git
synced 2024-12-30 07:35:19 +03:00
finish old cc, start new
This commit is contained in:
pilfer-pandex
parent
51487456df
commit
489ad3f90f
@ -4,15 +4,32 @@ import ClassyPrelude
|
||||
|
||||
type Atom = Integer
|
||||
|
||||
data Tree a = Atom !a
|
||||
| Cell !(Tree a) !(Tree a)
|
||||
deriving (Eq, Ord, Read, Show, Functor)
|
||||
|
||||
type Noun = Tree Atom
|
||||
data Tree a = A !a
|
||||
| C !(Tree a) !(Tree a)
|
||||
deriving (Eq, Ord, Read, Functor)
|
||||
|
||||
data Fern a = FernA !a
|
||||
| FernF [Fern a]
|
||||
|
||||
toFern :: Tree a -> Fern a
|
||||
toFern = \case
|
||||
A a -> FernA a
|
||||
C h t -> case toFern t of
|
||||
a@FernA{} -> FernF [toFern h, a]
|
||||
FernF fs -> FernF (toFern h : fs)
|
||||
|
||||
instance Show a => Show (Fern a) where
|
||||
show = \case
|
||||
FernA a -> show a
|
||||
FernF xs -> "[" <> intercalate " " (map show xs) <> "]"
|
||||
|
||||
instance Show a => Show (Tree a) where
|
||||
show = show . toFern
|
||||
|
||||
yes, no :: Noun
|
||||
yes = Atom 0
|
||||
no = Atom 1
|
||||
yes = A 0
|
||||
no = A 1
|
||||
|
||||
-- | Tree address
|
||||
type Axis = Atom
|
||||
@ -31,75 +48,78 @@ data Nock = NC Nock Nock -- ^ ^: autocons
|
||||
| N10 (Axis, Nock) Nock -- ^ 10, edit
|
||||
| N11 Hint Nock -- ^ 11, hint
|
||||
| N12 Nock Nock -- ^ 12, scry
|
||||
deriving (Eq, Ord, Read, Show)
|
||||
deriving (Eq, Ord, Read)
|
||||
|
||||
data Hint = Tag Atom
|
||||
| Assoc Atom Nock
|
||||
deriving (Eq, Ord, Read, Show)
|
||||
|
||||
instance Show Nock where
|
||||
show = show . nockToNoun
|
||||
|
||||
nockToNoun :: Nock -> Noun
|
||||
nockToNoun = go
|
||||
where
|
||||
go = \case
|
||||
NC f g -> Cell (go f) (go g)
|
||||
N0 a -> Cell (Atom 0) (Atom a)
|
||||
N1 n -> Cell (Atom 1) n
|
||||
N2 f g -> Cell (Atom 2) (Cell (go f) (go g))
|
||||
N3 f -> Cell (Atom 3) (go f)
|
||||
N4 f -> Cell (Atom 4) (go f)
|
||||
N5 f g -> Cell (Atom 5) (Cell (go f) (go g))
|
||||
N6 f g h -> Cell (Atom 5) (Cell (go f) (Cell (go g) (go h)))
|
||||
N7 f g -> Cell (Atom 7) (Cell (go f) (go g))
|
||||
N8 f g -> Cell (Atom 8) (Cell (go f) (go g))
|
||||
N9 a f -> Cell (Atom 9) (Cell (Atom a) (go f))
|
||||
N10 (a, f) g -> Cell (Atom 10) (Cell (Cell (Atom a) (go f)) (go g))
|
||||
N11 (Tag a) f -> Cell (Atom 11) (Cell (Atom a) (go f))
|
||||
N11 (Assoc a f) g -> Cell (Atom 11) (Cell (Cell (Atom a) (go f)) (go g))
|
||||
N12 f g -> Cell (Atom 12) (Cell (go f) (go g))
|
||||
NC f g -> C (go f) (go g)
|
||||
N0 a -> C (A 0) (A a)
|
||||
N1 n -> C (A 1) n
|
||||
N2 f g -> C (A 2) (C (go f) (go g))
|
||||
N3 f -> C (A 3) (go f)
|
||||
N4 f -> C (A 4) (go f)
|
||||
N5 f g -> C (A 5) (C (go f) (go g))
|
||||
N6 f g h -> C (A 5) (C (go f) (C (go g) (go h)))
|
||||
N7 f g -> C (A 7) (C (go f) (go g))
|
||||
N8 f g -> C (A 8) (C (go f) (go g))
|
||||
N9 a f -> C (A 9) (C (A a) (go f))
|
||||
N10 (a, f) g -> C (A 10) (C (C (A a) (go f)) (go g))
|
||||
N11 (Tag a) f -> C (A 11) (C (A a) (go f))
|
||||
N11 (Assoc a f) g -> C (A 11) (C (C (A a) (go f)) (go g))
|
||||
N12 f g -> C (A 12) (C (go f) (go g))
|
||||
|
||||
nounToNock :: Noun -> Nock
|
||||
nounToNock = go
|
||||
where
|
||||
go = \case
|
||||
Atom{} -> error "nounToNock: atom"
|
||||
Cell n@Cell{} m -> NC (go n) (go m)
|
||||
Cell (Atom op) n -> case op of
|
||||
0 | (Atom a) <- n -> N0 a
|
||||
A{} -> error "nounToNock: atom"
|
||||
C n@C{} m -> NC (go n) (go m)
|
||||
C (A op) n -> case op of
|
||||
0 | (A a) <- n -> N0 a
|
||||
1 -> N1 n
|
||||
2 | (Cell m o) <- n -> N2 (go m) (go o)
|
||||
2 | (C m o) <- n -> N2 (go m) (go o)
|
||||
3 -> N3 (go n)
|
||||
4 -> N4 (go n)
|
||||
5 | (Cell m o) <- n -> N5 (go m) (go o)
|
||||
6 | (Cell m (Cell o p)) <- n -> N6 (go m) (go o) (go p)
|
||||
7 | (Cell m o) <- n -> N7 (go m) (go o)
|
||||
8 | (Cell m o) <- n -> N8 (go m) (go o)
|
||||
9 | (Cell (Atom a) m) <- n -> N9 a (go m)
|
||||
10 | (Cell (Cell (Atom a) m) o) <- n -> N10 (a, (go m)) (go o)
|
||||
11 | (Cell (Cell (Atom a) m) o) <- n -> N11 (Assoc a (go m)) (go o)
|
||||
| (Cell (Atom a) m) <- n -> N11 (Tag a) (go m)
|
||||
12 | (Cell m o) <- n -> N12 (go m) (go o)
|
||||
5 | (C m o) <- n -> N5 (go m) (go o)
|
||||
6 | (C m (C o p)) <- n -> N6 (go m) (go o) (go p)
|
||||
7 | (C m o) <- n -> N7 (go m) (go o)
|
||||
8 | (C m o) <- n -> N8 (go m) (go o)
|
||||
9 | (C (A a) m) <- n -> N9 a (go m)
|
||||
10 | (C (C (A a) m) o) <- n -> N10 (a, (go m)) (go o)
|
||||
11 | (C (C (A a) m) o) <- n -> N11 (Assoc a (go m)) (go o)
|
||||
| (C (A a) m) <- n -> N11 (Tag a) (go m)
|
||||
12 | (C m o) <- n -> N12 (go m) (go o)
|
||||
_ -> error ("nockToNoun: invalid " <> show op <> " " <> show n)
|
||||
|
||||
-- | Nock interpreter
|
||||
nock :: Noun -> Nock -> Noun
|
||||
nock n = \case
|
||||
NC f g -> Cell (nock n f) (nock n g)
|
||||
NC f g -> C (nock n f) (nock n g)
|
||||
N0 a -> axis a n
|
||||
N1 n' -> n'
|
||||
N2 sf ff -> nock (nock n sf) (nounToNock (nock n ff))
|
||||
N3 f -> case nock n f of
|
||||
Cell{} -> yes
|
||||
Atom{} -> no
|
||||
C{} -> yes
|
||||
A{} -> no
|
||||
N4 f -> case nock n f of
|
||||
Cell{} -> error "nock: cannot increment cell"
|
||||
Atom a -> Atom (a + 1)
|
||||
C{} -> error "nock: cannot increment cell"
|
||||
A a -> A (a + 1)
|
||||
N5 f g -> if nock n f == nock n g then yes else no
|
||||
N6 f g h -> case nock n f of
|
||||
(Atom 0) -> nock n g
|
||||
(Atom 1) -> nock n h
|
||||
(A 0) -> nock n g
|
||||
(A 1) -> nock n h
|
||||
_ -> error "nock: invalid test value"
|
||||
N7 f g -> nock (nock n f) g
|
||||
N8 f g -> nock (Cell (nock n f) n) g
|
||||
N8 f g -> nock (C (nock n f) n) g
|
||||
N9 a f -> let c = nock n f in nock c (nounToNock (axis a c))
|
||||
N10{} -> error "nock: I don't want to implement editing right now"
|
||||
N11 _ f -> nock n f
|
||||
@ -148,7 +168,7 @@ peg a = \case
|
||||
|
||||
axis :: Axis -> Tree a -> Tree a
|
||||
axis 1 n = n
|
||||
axis (capMas -> (d, r)) (Cell n m) = case d of
|
||||
axis (capMas -> (d, r)) (C n m) = case d of
|
||||
L -> axis r n
|
||||
R -> axis r m
|
||||
axis a n = error ("bad axis: " ++ show a)
|
||||
|
||||
@ -3,11 +3,16 @@ module UntypedLambda where
|
||||
import ClassyPrelude
|
||||
|
||||
import Bound
|
||||
import Data.Deriving (deriveEq1, deriveOrd1, deriveRead1, deriveShow1)
|
||||
import Control.Monad.State
|
||||
import Data.Deriving (deriveEq1, deriveOrd1, deriveRead1, deriveShow1)
|
||||
import Data.List (elemIndex)
|
||||
import Data.Maybe (fromJust)
|
||||
import Data.Void
|
||||
|
||||
import Nock
|
||||
|
||||
type Nat = Int
|
||||
|
||||
data Exp a
|
||||
= Var a
|
||||
| App (Exp a) (Exp a)
|
||||
@ -36,13 +41,106 @@ eval = \case
|
||||
(Lam s) -> instantiate1 (eval f) s
|
||||
e' -> (App e' (eval f))
|
||||
|
||||
newtype Ref = Ref { unRef :: Int }
|
||||
-- 6, 30, 126, 510, ...
|
||||
oldDeBruijn :: Nat -> Axis
|
||||
oldDeBruijn = toAxis . go
|
||||
where
|
||||
go = \case
|
||||
0 -> [R,L]
|
||||
n -> [R,R] ++ go (n - 1)
|
||||
|
||||
nextRef :: Ref -> Ref
|
||||
nextRef = Ref . (+ 1) . unRef
|
||||
-- | Raw de Bruijn
|
||||
data Exp'
|
||||
= Var' Nat
|
||||
| App' Exp' Exp'
|
||||
| Lam' Exp'
|
||||
deriving (Eq, Ord, Read, Show)
|
||||
|
||||
toExp' :: Exp a -> Exp'
|
||||
toExp' = go \v -> error "toExp': free variable"
|
||||
where
|
||||
go :: (a -> Nat) -> Exp a -> Exp'
|
||||
go env = \case
|
||||
Var v -> Var' (env v)
|
||||
App e f -> App' (go env e) (go env f)
|
||||
Lam s -> Lam' (go env' (fromScope s))
|
||||
where
|
||||
env' = \case
|
||||
B () -> 0
|
||||
F v -> 1 + env v
|
||||
|
||||
-- | The old calling convention; i.e., what the (%-, |=) sublanguage of hoon
|
||||
-- compiles to
|
||||
old :: Exp a -> Nock
|
||||
old = undefined
|
||||
old = go \v -> error "old: free variable"
|
||||
where
|
||||
go :: (a -> Path) -> Exp a -> Nock
|
||||
go env = \case
|
||||
Var v -> N0 (toAxis (env v))
|
||||
App e f -> app (go env e) (go (\v -> R : env v) f)
|
||||
Lam s -> lam (nockToNoun (go env' (fromScope s)))
|
||||
where
|
||||
env' = \case
|
||||
B () -> [R,L]
|
||||
F v -> [R,R] ++ env v
|
||||
app ef ff =
|
||||
N8
|
||||
ef -- =+ callee so we don't modify the orig's bunt
|
||||
(N9 2
|
||||
(N10 (6, ff)
|
||||
(N0 2)))
|
||||
lam ff =
|
||||
N8 -- pushes onto the context
|
||||
(N1 (A 0)) -- a bunt value (in hoon, actually depends on type)
|
||||
(NC -- then conses (N8 would also work, but hoon doesn't)
|
||||
(N1 ff) -- the battery (nock code)
|
||||
(N0 1)) -- onto the pair of bunt and context
|
||||
|
||||
data CopyVar
|
||||
= Argument
|
||||
| Lexical Nat
|
||||
|
||||
data CopyExp
|
||||
= CVar CopyVar
|
||||
| CApp CopyExp CopyExp
|
||||
| CLam [CopyVar] CopyExp
|
||||
|
||||
toCopy :: forall a. Ord a => Exp a -> CopyExp
|
||||
toCopy = fst . go \v -> error "toCopy: free variable"
|
||||
where
|
||||
go :: (a -> CopyVar) -> Exp a -> (CopyExp, Set a)
|
||||
go env = \case
|
||||
Var v -> (CVar (env v), singleton v)
|
||||
App e f -> (CApp ec fc, union eu fu)
|
||||
where
|
||||
(ec, eu) = go env e
|
||||
(fc, fu) = go env f
|
||||
Lam s -> (CLam (map env u) c, fromList u)
|
||||
where
|
||||
c :: CopyExp
|
||||
(c, u') = go env' (fromScope s)
|
||||
env' :: Var () a -> CopyVar
|
||||
env' = \case
|
||||
B () -> Argument
|
||||
F v -> Lexical (fromJust (elemIndex v u))
|
||||
u = mapMaybe pred (toList u')
|
||||
pred = \case
|
||||
B () -> Nothing
|
||||
F v -> Just v
|
||||
|
||||
copyToNock :: CopyExp -> Nock
|
||||
copyToNock = \case
|
||||
CVar v -> toAxis case v of
|
||||
Argument -> [R]
|
||||
Lexical n -> L : repeat n R ++ L
|
||||
CApp e f -> N2 (copyToNock f) (copyToNock e)
|
||||
|
||||
-- | The proposed new calling convention
|
||||
new :: Exp a -> Nock
|
||||
new = go \v -> error "new: free variable"
|
||||
where
|
||||
go = undefined
|
||||
|
||||
|
||||
|
||||
-- x. y. x
|
||||
|
||||
Loading…
Reference in New Issue
Block a user