Create values for literal Strings.

frog/leg/compile_time_constants.dart

 // Copyright (c) 2012, 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.
 
 /**
  * The [CompileTimeConstantHandler] keeps track of compile-time constants,
  * initializations of global and static fields, and default values of
  * optional parameters.
  */
 class CompileTimeConstantHandler extends CompilerTask {
@@ skipping 78 matching lines @@
           && element.modifiers.isFinal();
     });
   }
 
   String getJsCodeForVariable(VariableElement element) {
     var value = initialVariableValues[element];
     if (value === null) return "(void 0)";
     if (value is num) return "$value";
     if (value === true) return "true";
     if (value === false) return "false";
+    if (value is SourceString) return value.stringValue;

[floitsch, 2012/02/14 10:40:57]

The string must be escaped.
Please also add a small test-case (eg: "\u{20}" == " ").

 
     // TODO(floitsch): support more values.
     compiler.unimplemented("CompileTimeConstantHandler.getJsCodeForVariable",
                            node: element.parseNode(compiler));
   }
 }
 
 class CompileTimeConstantEvaluator extends AbstractVisitor {
   final CompileTimeConstantHandler constantHandler;
   final TreeElements definitions;
@@ skipping 30 matching lines @@
 
   error(Element element) {
     // TODO(floitsch): get the list of constants that are currently compiled
     // and present some kind of stack-trace.
     MessageKind kind = MessageKind.NOT_A_COMPILE_TIME_CONSTANT;
     List arguments = [element.name];
     Node node = element.parseNode(compiler);
     compiler.reportError(node, new CompileTimeConstantError(kind, arguments));
   }
 }