a === b -> identical(a, b)

tests/language/ct_const2_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=
 // VMOptions=--compile_all
 
 // Exercises language constructs that require compile time constants
 
 // Initialize with different literal types
 const b = true;
@@ skipping 50 matching lines @@
 const BOP5_0 = 0x80 & 0x04;
 const BOP5_1 = 0x80 | 0x04;
 const BOP5_2 = 0x80 << 0x04;
 const BOP5_3 = 0x80 >> 0x04;
 const BOP5_4 = 0x80 ~/ 0x04;
 const BOP5_5 = 0x80 ^ 0x04;
 const BOP6 = BOOL_LIT && true;
 const BOP7 = false || BOOL_LIT;
 const BOP8 = STRING_LIT == "World!";
 const BOP9 = "Hello" != STRING_LIT;
-const BOP10 = INT_LIT === INT_LIT_REF;
-const BOP11 = BOOL_LIT !== true;
+const BOP10 = INT_LIT == INT_LIT_REF;

[Lasse Reichstein Nielsen, 2012/11/12 13:10:41]

Use identical here too.
It is a compile-time constant.

[floitsch, 2012/11/12 22:18:43]

identical doesn't yet work on compile-time constants. Not sure if it supposed to
be.

+const BOP11 = BOOL_LIT != true;
 
 // Multiple binary expressions
 const BOP20 = 1 * INT_LIT / 3 + INT_LIT + 9;
 
 // Parenthised expressions
 const BOP30 = ( 1 > 2 );
 const BOP31 = (1 * 2) + 3;
 const BOP32= 3 + (1 * 2);
 
 // Unary expressions
@@ skipping 14 matching lines @@
 const UOP3_6 = -DOUBLE_LIT + 123;
 const UOP3_7 = -(DOUBLE_LIT * 0xff);
 
 class A {
   const A();
   static const a = const A(); // Assignment from Constant constructor OK
 }
 
 main () {
 }