diff options
Diffstat (limited to 'Binaries/DafnyPrelude.bpl')
| -rw-r--r-- | Binaries/DafnyPrelude.bpl | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Binaries/DafnyPrelude.bpl b/Binaries/DafnyPrelude.bpl index 60de3d84..50433b54 100644 --- a/Binaries/DafnyPrelude.bpl +++ b/Binaries/DafnyPrelude.bpl @@ -153,6 +153,14 @@ axiom (forall<T> s: Seq T, n: int, j: int :: { Seq#Index(Seq#Drop(s,n), j) } Seq#Index(Seq#Drop(s,n), j) == Seq#Index(s, j+n));
// ---------------------------------------------------------------
+// -- If then else -----------------------------------------------
+// ---------------------------------------------------------------
+
+function $ite<T>(bool, T, T): T;
+axiom (forall<T> g: bool, a,b: T :: { $ite(g,a,b) }
+ (g ==> $ite(g,a,b) == a) && (!g ==> $ite(g,a,b) == b));
+
+// ---------------------------------------------------------------
// -- Boxing and unboxing ----------------------------------------
// ---------------------------------------------------------------
|