Create class AST nodes.

dart/frog/world.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.
 
 /** The one true [World]. */
 World world;
 
 /**
  * Should be called exactly once to setup singleton world.
  * Can use world.reset() to reinitialize.
@@ skipping 244 matching lines @@
         // TODO(jimhug): If dev mode then throw.
       } else {
         // TODO(jimhug): Handle these in world or in callers?
         throw;
       }
     }
     printStatus();
     return !hasErrors;
   }
 
+  /** Returns true if Leg handled the compilation job. */
   bool runLeg() {
     if (!options.enableLeg) return false;
     bool res = withTiming('try leg compile', () => leg.compile(this));
     if (!res && options.legOnly) {
       fatal("Leg could not compile ${options.dartScript}");
+      return true; // In --leg_only, always "handle" the compilation.
     }
     return res;
   }
 
   void runCompilationPhases() {
     final lib = withTiming('first pass',
         () => processScript(options.dartScript));
 
     withTiming('resolve top level', () { resolveAll(); });
 
@@ skipping 152 matching lines @@
 
   withTiming(String name, f()) {
     final sw = new StopWatch();
     sw.start();
     var result = f();
     sw.stop();
     info('$name in ${sw.elapsedInMs()}msec');
     return result;
   }
 }