clean up demo code

[coq-hetmet.git] / src / HaskWeakTypes.v

diff --git a/src/HaskWeakTypes.v b/src/HaskWeakTypes.v
index 8f55346..9ec126e 100644 (file)
--- a/src/HaskWeakTypes.v
+++ b/src/HaskWeakTypes.v
@@ -8,17 +8,9 @@ Require Import General.
 Require Import Coq.Strings.String.
 Require Import Coq.Lists.List.
 Require Import HaskKinds.
-Require Import HaskCoreLiterals.
+Require Import HaskLiterals.
+Require Import HaskTyCons.
 Require Import HaskCoreVars.
-Require Import HaskCoreTypes.
-
-Variable tyConToCoreTyCon : TyCon -> CoreTyCon.           Extract Inlined Constant tyConToCoreTyCon  => "(\x -> x)".
-Variable tyFunToCoreTyCon : TyFun -> CoreTyCon.           Extract Inlined Constant tyFunToCoreTyCon  => "(\x -> x)".
-Coercion tyConToCoreTyCon : TyCon >-> CoreTyCon.
-Coercion tyFunToCoreTyCon : TyFun >-> CoreTyCon.
-
-Instance TyConToString : ToString TyCon := { toString := tyConToString }.
-Instance TyFunToString : ToString TyFun := { toString := tyConToString }.
 
 (* a WeakTypeVar merely wraps a CoreVar and includes its Kind *)
 Inductive WeakTypeVar := weakTypeVar : CoreVar -> Kind -> WeakTypeVar.
@@ -55,7 +47,7 @@ Instance WeakTypeVarEqDecidable : EqDecidable WeakTypeVar.
     Defined.
 
 (* a WeakCoerVar just wraps a CoreVar and tags it with the pair of types amongst which it coerces *)
-Inductive WeakCoerVar := weakCoerVar : CoreVar -> Kind -> WeakType -> WeakType -> WeakCoerVar.
+Inductive WeakCoerVar := weakCoerVar : CoreVar -> WeakType -> WeakType -> WeakCoerVar.
 
 Inductive WeakCoercion : Type :=
 | WCoVar          : WeakCoerVar                                   -> WeakCoercion (* g      *)
@@ -72,43 +64,27 @@ Inductive WeakCoercion : Type :=
 (*| WCoTFApp        : ∀ n, TyFunConst n -> vec WeakCoercion n       -> WeakCoercion (* S_n γⁿ *)*)
 .
 
-Variable Prelude_error : forall {A}, string -> A.   Extract Inlined Constant Prelude_error => "Prelude.error".
 Fixpoint weakCoercionTypes (wc:WeakCoercion) : WeakType * WeakType :=
 match wc with
-| WCoVar     (weakCoerVar _ _ t1 t2) => (t1,t2)
-| WCoType    t                       => Prelude_error "FIXME WCoType"
-| WCoApp     c1 c2                   => Prelude_error "FIXME WCoApp"
-| WCoAppT    c t                     => Prelude_error "FIXME WCoAppT"
-| WCoAll     k f                     => Prelude_error "FIXME WCoAll"
+| WCoVar     (weakCoerVar _ t1 t2)   => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoType    t                       => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoApp     c1 c2                   => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoAppT    c t                     => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoAll     k f                     => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
 | WCoSym     c                       => let (t2,t1) := weakCoercionTypes c in (t1,t2)
-| WCoComp    c1 c2                   => Prelude_error "FIXME WCoComp"
-| WCoLeft    c                       => Prelude_error "FIXME WCoLeft"
-| WCoRight   c                       => Prelude_error "FIXME WCoRight"
+| WCoComp    c1 c2                   => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoLeft    c                       => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
+| WCoRight   c                       => (WFunTyCon,WFunTyCon)   (* FIXME!!! *)
 | WCoUnsafe  t1 t2                   => (t1,t2)
 end.
 
-Variable ModalBoxTyCon   : TyCon.        Extract Inlined Constant ModalBoxTyCon => "TysWiredIn.hetMetCodeTypeTyCon".
-Variable ArrowTyCon      : TyCon.        Extract Constant ArrowTyCon    => "Type.funTyCon".
 
-Fixpoint weakTypeToCoreType (wt:WeakType) : CoreType :=
-  match wt with
-    | WTyVarTy  (weakTypeVar v _)     => TyVarTy v
-    | WAppTy (WAppTy WFunTyCon t1) t2 => FunTy (weakTypeToCoreType t1) (weakTypeToCoreType t2)
-    | WAppTy  t1 t2                   => match (weakTypeToCoreType t1) with
-                                           | TyConApp tc tys => TyConApp tc (app tys ((weakTypeToCoreType t2)::nil))
-                                           | t1'             => AppTy t1' (weakTypeToCoreType t2)
-                                         end
-    | WTyCon    tc                    => TyConApp tc nil
-    | WTyFunApp tf lt                 => TyConApp tf (map weakTypeToCoreType lt)
-    | WClassP c lt                    => PredTy (ClassP c (map weakTypeToCoreType lt))
-    | WIParam n ty                    => PredTy (IParam n (weakTypeToCoreType ty))
-    | WForAllTy (weakTypeVar wtv _) t => ForAllTy wtv (weakTypeToCoreType t)
-    | WFunTyCon                       => TyConApp ArrowTyCon nil
-    | WCodeTy  (weakTypeVar ec _) t   => TyConApp ModalBoxTyCon ((TyVarTy ec)::(weakTypeToCoreType t)::nil)
-    | WCoFunTy t1 t2 t3               => FunTy (PredTy (EqPred (weakTypeToCoreType t1) (weakTypeToCoreType t2)))
-                                            (weakTypeToCoreType t3)
-  end.
-
-Instance WeakTypeToString : ToString WeakType :=
-  { toString := coreTypeToString ○ weakTypeToCoreType }.
+(* this is a trick to allow circular definitions, post-extraction *)
+Variable weakTypeToString : WeakType -> string.
+    Extract Inlined Constant weakTypeToString => "(coreTypeToString . weakTypeToCoreType)".
+Instance WeakTypeToString : ToString WeakType := { toString := weakTypeToString }.
 
+Variable tyConToCoreTyCon : TyCon  -> CoreTyCon.           Extract Inlined Constant tyConToCoreTyCon  => "(\x -> x)".
+Variable tyFunToCoreTyCon : TyFun  -> CoreTyCon.           Extract Inlined Constant tyFunToCoreTyCon  => "(\x -> x)".
+Coercion tyConToCoreTyCon : TyCon >-> CoreTyCon.
+Coercion tyFunToCoreTyCon : TyFun >-> CoreTyCon.