Fix for bug 1229: Unary operator plus is not allowed ... except for literals.

tests/corelib/src/MathTest.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.
 
 class MathTest {
   static void testConstants() {
     // Source for mathematical constants is Wolfram Alpha.
     Expect.equals(2.7182818284590452353602874713526624977572470936999595749669,
                   Math.E);
     Expect.equals(2.3025850929940456840179914546843642076011014886287729760333,
@@ skipping 212 matching lines @@
     Expect.equals(true, parseIntThrowsBadNumberFormatException("0x3.1"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("5."));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("+-5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("-+5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("--5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("++5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("+ 5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("- 5"));
     Expect.equals(true, parseIntThrowsBadNumberFormatException(""));
     Expect.equals(true, parseIntThrowsBadNumberFormatException("  "));
+    Expect.equals(true, parseIntThrowsBadNumberFormatException("+ 1"));

[hausner, 2012/01/31 18:09:46]

Already covered in line 229, but no harm.

   }
 
   static bool parseDoubleThrowsBadNumberFormatException(str) {
     try {
       Math.parseDouble(str);
       return false;
     } catch (BadNumberFormatException e) {
       return true;
     }
   }
@@ skipping 120 matching lines @@
     testExp();
     testPow();
     testParseInt();
     testParseDouble();
   }
 }
 
 main() {
   MathTest.testMain();
 }