Revert revision 33053

third_party/pkg/di/lib/dynamic_injector.dart

 library di.dynamic_injector;
 
 import 'di.dart';
 import 'mirrors.dart';
 
 /**
  * Dynamic implementation of [Injector] that uses mirrors.
  */
 class DynamicInjector extends Injector {
 
@@ skipping 12 matching lines @@
   Object newInstanceOf(Type type, ObjectFactory getInstanceByType,
                        Injector requestor, error) {
     var classMirror = reflectType(type);
     if (classMirror is TypedefMirror) {
       throw new NoProviderError(error('No implementation provided '
           'for ${getSymbolName(classMirror.qualifiedName)} typedef!'));
     }
 
     MethodMirror ctor = classMirror.declarations[classMirror.simpleName];
 
-    if (ctor == null) {
-      throw new NoProviderError('Unable to find default constructor for $type. '
-          'Make sure class has a default constructor.' +
-          (1.0 is int ?
-              ' Make sure you have correctly configured @MirrorsUsed.' : ''));
-    }
-
     resolveArgument(int pos) {
       ParameterMirror p = ctor.parameters[pos];
-      if (MirrorSystem.getName(p.type.qualifiedName) == 'dynamic') {
-        var name = MirrorSystem.getName(p.simpleName);
-        throw new NoProviderError(error("The '$name' parameter must be typed"));
-      }
-      if (p.type is TypedefMirror) {
-        throw new NoProviderError(
-            error('Cannot create new instance of a typedef ${p.type}'));
-      }
       return getInstanceByType(getReflectedTypeWorkaround(p.type), requestor);
     }
 
     var args = new List.generate(ctor.parameters.length, resolveArgument,
         growable: false);
     return classMirror.newInstance(ctor.constructorName, args).reflectee;
   }
 
   /**
    * Invoke given function and inject all its arguments.
@@ skipping 10 matching lines @@
       } on NoProviderError catch (e) {
         throw new NoProviderError(e.message);
       } finally {
         position++;
       }
     }).toList();
 
     return cm.apply(args).reflectee;
   }
 }