Browse Source

Fix composition for pairs

feature/hits
Amélia Liao 3 years ago
parent
commit
28e1867f76
6 changed files with 29 additions and 21 deletions
  1. +4
    -3
      intro.tt
  2. +3
    -0
      src/Elab/Eval.hs
  3. +17
    -14
      src/Elab/WiredIn.hs
  4. +2
    -1
      src/Elab/WiredIn.hs-boot
  5. +2
    -2
      src/Main.hs
  6. +1
    -1
      src/Syntax.hs

+ 4
- 3
intro.tt View File

@ -260,7 +260,7 @@ trans {A} {x} p q i =
-- single point, which corresponds to transport.
transp : (A : I -> Type) (x : A i0) -> A i1
transp A x = comp A (\i [ ]) (inS x)
transp A x = comp A {i0} (\i [ ]) (inS x)
-- Since we have the iand operator, we can also derive the *filler* of a cube,
-- which connects the given face and the output of composition.
@ -319,7 +319,7 @@ fiber f y = (x : A) * Path (f x) y
-- point in the input which f maps to y.
isEquiv : {A : Type} {B : Type} -> (A -> B) -> Type
isEquiv {A} {B} f = (y : B) -> isContr (fiber f y)
isEquiv {A} {B} f = (y : B) -> isContr (fiber {A} {B} f y)
-- By extracting this point, which must exist because the fiber is contractible,
-- we can get an inverse of f:
@ -337,7 +337,7 @@ section f eqv i y = (eqv y) .1 .2 i
-- equivalence to get a capital-E Equivalence.
Equiv : (A : Type) (B : Type) -> Type
Equiv A B = (f : A -> B) * isEquiv f
Equiv A B = (f : A -> B) * isEquiv {A} {B} f
-- The identity function is an equivalence between any type A and
-- itself.
@ -419,6 +419,7 @@ univalence {A} {B} equiv i =
Glue B (\[ (i = i0) -> (A, equiv),
(i = i1) -> (B, the B, idEquiv {B}) ])
-- The fact that this diagram has 2 filled-in B sides explains the
-- complication in the proof below.
--


+ 3
- 0
src/Elab/Eval.hs View File

@ -206,6 +206,7 @@ vApp p (VLam p' k) arg
| otherwise = error $ "wrong plicity " ++ show p ++ " vs " ++ show p' ++ " in app " ++ show (App p (quote (VLam p' k)) (quote arg))
vApp p (VNe h sp) arg = VNe h (sp Seq.:|> PApp p arg)
vApp p (VSystem fs) arg = VSystem (fmap (flip (vApp p) arg) fs)
vApp p (VInc (VPi _ _ (Closure _ r)) phi f) arg = VInc (r (vApp p f arg)) phi (vApp p f arg)
vApp _ x _ = error $ "can't apply " ++ show (prettyTm (quote x))
(@@) :: HasCallStack => Value -> Value -> Value
@ -216,12 +217,14 @@ vProj1 :: HasCallStack => Value -> Value
vProj1 (VPair a _) = a
vProj1 (VNe h sp) = VNe h (sp Seq.:|> PProj1)
vProj1 (VSystem fs) = VSystem (fmap vProj1 fs)
vProj1 (VInc (VSigma a _) b c) = VInc a b (vProj1 c)
vProj1 x = error $ "can't proj1 " ++ show (prettyTm (quote x))
vProj2 :: HasCallStack => Value -> Value
vProj2 (VPair _ b) = b
vProj2 (VNe h sp) = VNe h (sp Seq.:|> PProj2)
vProj2 (VSystem fs) = VSystem (fmap vProj2 fs)
vProj2 (VInc (VSigma _ (Closure _ r)) b c) = VInc (r (vProj1 c)) b (vProj2 c)
vProj2 x = error $ "can't proj2 " ++ show (prettyTm (quote x))
data NotEqual = NotEqual Value Value


+ 17
- 14
src/Elab/WiredIn.hs View File

@ -22,6 +22,8 @@ import qualified Presyntax.Presyntax as P
import Syntax
import System.IO.Unsafe
import Syntax.Pretty (prettyTm)
import GHC.Stack (HasCallStack)
wiType :: WiredIn -> NFType
wiType WiType = VType
@ -201,16 +203,17 @@ inot = \case
x -> VINot x
ielim :: Value -> Value -> Value -> Value -> NFEndp -> Value
ielim _line _left _right fn i =
ielim line left right fn i =
case force fn of
VLine _ _ _ fun -> fun @@ i
x -> case i of
VI1 -> _right
VI0 -> _left
VI1 -> right
VI0 -> left
_ -> case x of
VNe n sp -> VNe n (sp Seq.:|> PIElim _line _left _right i)
VSystem map -> VSystem (fmap (flip (ielim _line _left _right) i) map)
_ -> error $ "can't ielim " ++ show fn
VNe n sp -> VNe n (sp Seq.:|> PIElim line left right i)
VSystem map -> VSystem (fmap (flip (ielim line left right) i) map)
VInc (VPath _ _ _) _ u -> ielim line left right u i
_ -> error $ "can't ielim " ++ show (prettyTm (quote fn))
outS :: NFSort -> NFEndp -> Value -> Value -> Value
outS _ (force -> VI1) u _ = u @@ VItIsOne
@ -219,10 +222,10 @@ outS _ _phi _ (VInc _ _ x) = x
outS _ VI0 _ x = x
outS a phi u (VNe x sp) = VNe x (sp Seq.:|> POuc a phi u)
outS _ _ _ v = error $ "can't outS " ++ show v
outS _ _ _ v = error $ "can't outS " ++ show (prettyTm (quote v))
-- Composition
comp :: NFLine -> NFEndp -> Value -> Value -> Value
comp :: HasCallStack => NFLine -> NFEndp -> Value -> Value -> Value
comp _ VI1 u _ = u @@ VI1 @@ VItIsOne
comp a psi@phi u (compOutS (a @@ VI1) phi (u @@ VI1 @@ VItIsOne) -> a0) =
case force $ a @@ VVar (Bound (T.pack "i") 0) of
@ -246,8 +249,8 @@ comp a psi@phi u (compOutS (a @@ VI1) phi (u @@ VI1 @@ VItIsOne) -> a0) =
w i = fill (fun dom) phi (system \i isone -> vProj1 (u @@ i @@ isone)) (VInc (dom VI0) phi (vProj1 a0)) i
c1 = comp (fun dom) phi (system \i isone -> vProj1 (u @@ i @@ isone)) (VInc (dom VI0) phi (vProj1 a0))
c2 = comp (fun (($ w VI1) . rng)) phi (system \i isone -> vProj1 (u @@ i @@ isone)) (VInc (rng VI0 (dom VI0)) phi (vProj2 a0))
in
c2 = comp (fun \x -> rng x (w x)) phi (system \i isone -> vProj2 (u @@ i @@ isone)) (VInc (rng VI0 (w VI0)) phi (vProj2 a0))
in
VPair c1 c2
VPath{} ->
@ -309,7 +312,7 @@ comp a psi@phi u (compOutS (a @@ VI1) phi (u @@ VI1 @@ VItIsOne) -> a0) =
-- fibrancy structure of the booleans is trivial
VBool{} -> a0
_ -> VComp a phi u a0
_ -> VComp a phi u (VInc (a @@ VI0) phi a0)
compOutS :: NFSort -> NFEndp -> Value -> Value -> Value
compOutS _ _hi _0 vl@VComp{} = vl
@ -380,17 +383,17 @@ pres tyT tyA f phi t t0 = (VInc pathT phi (VLine (tyA VI1) c1 c2 (line path)), p
path j = comp (fun tyA) (phi `ior` j) (system \i _ -> f i @@ (v i)) a0
opEquiv :: Value -> Value -> Value -> NFEndp -> Value -> Value -> Value -> (Value, NFSort, Value)
opEquiv :: HasCallStack => Value -> Value -> Value -> NFEndp -> Value -> Value -> Value -> (Value, NFSort, Value)
opEquiv aT tT f phi t p a = (VInc ty phi v, ty, fun \u -> VPair (t @@ u) (p @@ u)) where
fn = vProj1 f
ty = exists' "f" tT \x -> VPath (line (const aT)) a (fn @@ x)
v = contr ty (vProj2 f @@ a) phi (\u -> VPair (t @@ u) (p @@ u))
contr :: Value -> Value -> NFEndp -> (Value -> Value) -> Value
contr :: HasCallStack => Value -> Value -> NFEndp -> (Value -> Value) -> Value
contr a aC phi u =
comp (line (const a))
phi
(system \i is1 -> ielim (line (const a)) a (vProj1 (u is1)) (vProj2 (u is1)) i)
(system \i is1 -> ielim (line (const a)) (vProj1 aC) (u is1) (vProj2 aC @@ u is1) i)
(vProj1 aC)
makeEquiv :: (NFEndp -> Value) -> Value


+ 2
- 1
src/Elab/WiredIn.hs-boot View File

@ -1,6 +1,7 @@
module Elab.WiredIn where
import Syntax
import GHC.Stack
wiType :: WiredIn -> NFType
wiValue :: WiredIn -> NFType
@ -10,7 +11,7 @@ inot :: NFEndp -> NFEndp
ielim :: NFSort -> Value -> Value -> Value -> NFEndp -> Value
outS :: NFSort -> NFEndp -> Value -> Value -> Value
comp :: NFLine -> NFEndp -> Value -> Value -> Value
comp :: HasCallStack => NFLine -> NFEndp -> Value -> Value -> Value
glueType :: NFSort -> NFEndp -> NFPartial -> NFPartial -> Value
glueElem :: NFSort -> NFEndp -> NFPartial -> NFPartial -> NFPartial -> Value -> Value


+ 2
- 2
src/Main.hs View File

@ -157,8 +157,8 @@ displayExceptions lines =
, Handler \(NotEqual ta tb) -> do
putStrLn . unlines $
[ "\x1b[1;31merror\x1b[0m: Mismatch between actual and expected types:"
, " * \x1b[1mActual\x1b[0m: " ++ showValue (zonk ta)
, " * \x1b[1mExpected\x1b[0m: " ++ showValue (zonk tb)
, " * \x1b[1mActual\x1b[0m: " ++ show (zonk ta)
, " * \x1b[1mExpected\x1b[0m: " ++ show (zonk tb)
]
, Handler \(NoSuchPrimitive x) -> do
putStrLn $ "Unknown primitive: " ++ T.unpack x


+ 1
- 1
src/Syntax.hs View File

@ -118,7 +118,7 @@ instance Eq MV where
instance Ord MV where
(<=) = (<=) `on` mvName
instance Show MV where
show = ('?':) . T.unpack . mvName
show x = show (mvName x, mvSpan x)
instance Data MV where
toConstr _ = error "toConstr"


Loading…
Cancel
Save