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[helm.git] / matita / matita / lib / extraction.ma

diff --git a/matita/matita/lib/extraction.ma b/matita/matita/lib/extraction.ma
index aa781cfa7469ce8b40226a74e480d01bf8c52b23..c06357f33003d58f89a9010a114ae34a59c1ca4e 100644 (file)
--- a/matita/matita/lib/extraction.ma
+++ b/matita/matita/lib/extraction.ma
@@ -14,8 +14,6 @@
 
 include "basics/pts.ma".
 
-(*FEATURE: kind signatures in type declarations*)
-
 inductive nat : Type[0] ≝ O: nat | S: nat → nat.
 
 axiom test1: Type[1].
@@ -73,7 +71,6 @@ definition dtest13 ≝ dtest3 nat → dtest3 True → dtest3 Prop → nat.
 
 definition dtest14 ≝ λX:Type[2]. X → X.
 
-(*FEATURE: type the forall bound variables*)
 definition dtest15 ≝ ∀T:Type[1] → Type[1]. T nat → T nat.
 
 definition dtest16 ≝ ∀T:Type[1]. T → nat.
@@ -123,11 +120,6 @@ definition ttest12 ≝ λf:True → nat. f I.
 
 (*GENERAL BUG: name clashes when binders shadow each other in CIC*)
 
-(*BUG: mutual type definitions not handled correctly: the ref is computed in a
-  wrong way *)
-  
-(*BUG: multiple let-reced things are given the same (wrong) name*)
-
 (*BUG: for OCaml: cofixpoint not distinguished from fixpoints*)
 
 let rec rtest1 (n:nat) : nat ≝
@@ -147,9 +139,6 @@ and g (n:nat) : nat ≝
 (*BUG: pattern matching patterns when arguments have been deleted from
   the constructor are wrong *)
 
-(*BUG: constructor names in pattern should be capitalised correctly;
-  name clashes must be avoided*)
-
 coinductive stream: Type[0] ≝ scons : nat → stream → stream.
 
 let corec div (n:nat) : stream ≝ scons n (div (S n)).
@@ -176,14 +165,34 @@ inductive T1 : (Type[0] → Type[0]) → ∀B:Type[0]. nat → Type[0] → Type[
 inductive T2 : (Type[0] → Type[0]) → ∀B:Type[0]. B → Type[0] → Type[0] ≝ .
 
 (* no content *)
-(*BUG: eliminators extracted anyway???*)
 inductive T3 : (Type[0] → Type[0]) → CProp[2] ≝ .
 
 definition erase ≝ λX:Type[0].Type[0].
 
 axiom lt: nat → nat → Prop.
 
-(*BUG: elimination principles not extracted *)
 inductive myvect (A: Type[0]) (b:nat) : nat → Type[0] ≝
    myemptyv : myvect A b O
- | mycons: ∀n. lt n b → A → myvect A b n → myvect A b (S n).
\ No newline at end of file
+ | mycons: ∀n. lt n b → A → myvect A b n → myvect A b (S n).
+ 
+inductive False: Prop ≝ .
+
+inductive Empty: Type[0] ≝ .
+
+inductive bool: Type[0] ≝ true: bool | false:bool.
+
+inductive eq (A:Type[1]) (a:A) : A → Prop ≝ refl: eq A a a.
+
+(* requires coercion *)
+definition cast_bug1 ≝
+ λH:eq Type[0] bool nat. S (match H return λA:Type[0].λ_.A with [ refl ⇒ true ]).
+
+(* requires coercion in all branches *)
+definition cast_bug2 ≝
+ λb.
+  match true return λb.match b with [ true ⇒ nat → nat | false ⇒ bool ] with
+   [ true ⇒ S | false ⇒ false ]
+  O.
+  
+(*BUG: try singleton elimination with constructor arguments to show bug in
+ DeBrujin indexes *)