From 7d5178d5e5f652f8c3e0948b60adccb47f06d335 Mon Sep 17 00:00:00 2001
From: Mike Barnett <mbarnett@microsoft.com>
Date: Mon, 31 Oct 2011 15:30:58 -0700
Subject: File to experiment with type encoding for .NET.

---
 Test/datatypes/t2.bpl | 42 ++++++++++++++++++++++++++++++------------
 1 file changed, 30 insertions(+), 12 deletions(-)

(limited to 'Test/datatypes')

diff --git a/Test/datatypes/t2.bpl b/Test/datatypes/t2.bpl
index 26ffd337..2bca4e83 100644
--- a/Test/datatypes/t2.bpl
+++ b/Test/datatypes/t2.bpl
@@ -1,36 +1,54 @@
 
 type {:datatype} DotNetType;
 
+/*\
+ *  Subtype Axioms
+\*/
+function $Subtype(DotNetType, DotNetType) : bool;
+// reflexive
+axiom (forall t: DotNetType :: $Subtype(t, t));
+// anti-symmetric
+axiom (forall t0: DotNetType, t1: DotNetType :: { $Subtype(t0, t1), $Subtype(t1, t0) } $Subtype(t0, t1) && $Subtype(t1, t0) ==> t0 == t1);
+// transitive
+axiom (forall t0: DotNetType, t1: DotNetType, t2: DotNetType :: { $Subtype(t0, t1), $Subtype(t1, t2) } $Subtype(t0, t1) && $Subtype(t1, t2) ==> $Subtype(t0, t2));
+
+/*\
+ *  Type Declarations
+\*/
 // class System.Object { ... }
 function {:constructor} System.Object() : DotNetType;
 
-// class NominalType2 : System.Object { ... }
-function {:constructor} NominalType2() : DotNetType;
-axiom $Subtype(NominalType2(), System.Object());
+// class B : System.Object { ... }
+function {:constructor} B() : DotNetType;
+axiom $Subtype(B(), System.Object());
 
 // class GenericType1<T> : System.Object { ... }
 function {:constructor} GenericType1(T:DotNetType) : DotNetType;
 axiom (forall t : DotNetType :: $Subtype(GenericType1(t), System.Object()));
 
-function $Subtype(DotNetType, DotNetType) : bool;
-// reflexive
-axiom (forall t: DotNetType :: $Subtype(t, t));
-// anti-symmetric
-axiom (forall t0: DotNetType, t1: DotNetType :: { $Subtype(t0, t1), $Subtype(t1, t0) } $Subtype(t0, t1) && $Subtype(t1, t0) ==> t0 == t1);
-// transitive
-axiom (forall t0: DotNetType, t1: DotNetType, t2: DotNetType :: { $Subtype(t0, t1), $Subtype(t1, t2) } $Subtype(t0, t1) && $Subtype(t1, t2) ==> $Subtype(t0, t2));
+// class C : GenericType1<object>
+function {:constructor} C() : DotNetType;
+axiom $Subtype(C(), GenericType1(System.Object()));
+
+// class D<U> : GenericType1<U>
+function {:constructor} D(U:DotNetType) : DotNetType;
+axiom (forall u : DotNetType :: $Subtype(D(u), GenericType1(u)));
+
+// class GenericType2<T,U> : System.Object { ... }
+function {:constructor} GenericType2(T:DotNetType, U:DotNetType) : DotNetType;
+axiom (forall t : DotNetType, u : DotNetType :: $Subtype(GenericType2(t,u), System.Object()));
 
 procedure foo(t : DotNetType) 
 {
   assert System.Object() != GenericType1(t);
-  assert System.Object() != NominalType2();
+  assert System.Object() != B();
 }
 
 procedure bar(t : DotNetType, u : DotNetType) 
   requires t != u;
 {
   assert System.Object() != GenericType1(t);
-  assert System.Object() != NominalType2();
+  assert System.Object() != B();
   assert GenericType1(t) != GenericType1(u);
 }
 
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