Handle escapes in string literals.

frog/tests/leg/src/BuiltinInterceptorTest.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.
 
 #import("compiler_helper.dart");
 
 final String TEST_ONE = @"""
 foo(String a) {
   return a.length;
 }
 """;
 
 final String TEST_TWO = @"""
 foo() {
   return "foo".length;
 }
 """;
 
 final String TEST_THREE = @"""
 foo() {
   return @"foo".length;
 }
 """;
 
 main() {
   String generated = compile(TEST_ONE, 'foo');
   Expect.isTrue(generated.contains("return a.length;"));
 
-  // TODO(ngeoffray): Enable once we support raw strings
-  // and folding of length.
-  Exception exception;
+  // TODO(lrn): Reenable when we start constant folding string length properly.
+  bool failed = false;
   try {
     generated = compile(TEST_TWO, 'foo');
     Expect.isTrue(generated.contains("return 3;"));
 
     generated = compile(TEST_THREE, 'foo');
     Expect.isTrue(generated.contains("return 3;"));
-  } catch (var e) {
-    exception = e;
+  } catch (Exception e) {

[ahe, 2012/01/17 13:21:39]

This seems unfortunate to me. How about:

generated = compile(TEST_TWO, 'foo');
Expect.isFalse(generated.contains("return 3;"));// TODO(lrn): Switch to isTrue.

...

[Lasse Reichstein Nielsen, 2012/01/18 08:22:34]

Good idea.

+    failed = true;
   }
-  Expect.isTrue(exception != null);
+  Expect.isTrue(failed);
 }