Re-apply "What if you closurize identical?" but this time don't be magic: it requires the compiler …

tests/language/identical_closure2_test.dart

Index: tests/language/identical_closure2_test.dart
===================================================================
--- tests/language/identical_closure2_test.dart	(revision 16786)
+++ tests/language/identical_closure2_test.dart	(working copy)
@@ -10,18 +10,6 @@
 }
 
 main() {
-  // Smi.
-  Expect.isTrue(myIdentical(42, 42));
-  Expect.isFalse(myIdentical(42, 41));
-
-  // Double.
-  Expect.isTrue(myIdentical(42.0, 42.0));
-  Expect.isFalse(myIdentical(42.0, 41.0));
-
-  // Mint (2^45).
-  Expect.isTrue(myIdentical(35184372088832,35184372088832));
-  Expect.isFalse(myIdentical(35184372088832,35184372088831));
-
   // Bigint (2^76).
   Expect.isTrue(myIdentical(75557863725914323419136,
                             75557863725914323419136));
@@ -30,21 +18,7 @@
 
   // Different types.
   Expect.isFalse(myIdentical(42, 42.0));
-  Expect.isFalse(myIdentical("hello", 41));
 
-  // Points.
-  var p = new Point(1,1);
-  var q = new Point(1,1);
-  Expect.isFalse(myIdentical(p, q));
-
-  // Strings.
-  var a = "hello";
-  var b = "hello";
-  // Identical strings are coalesced into single instances.
-  Expect.isTrue(myIdentical(a, b));
-
-  // Null and NaN handling.
-  Expect.isFalse(myIdentical(42, null));
-  Expect.isTrue(myIdentical(null, null));
+  // NaN handling.
   Expect.isTrue(myIdentical(double.NAN, double.NAN));
-}
+}