Support forEachClassMember on closure classes

pkg/compiler/lib/src/universe/use.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.
 
 /// This library defines individual world impacts.
 ///
 /// We call these building blocks `uses`. Each `use` is a single impact of the
 /// world. Some example uses are:
 ///
 ///  * an invocation of a top level function
@@ skipping 59 matching lines @@
 }
 
 enum StaticUseKind {
   GENERAL,
   STATIC_TEAR_OFF,
   SUPER_TEAR_OFF,
   SUPER_FIELD_SET,
   FIELD_GET,
   FIELD_SET,
   CLOSURE,
+  CALL_METHOD,
   CONSTRUCTOR_INVOKE,
   CONST_CONSTRUCTOR_INVOKE,
   REDIRECTION,
   DIRECT_INVOKE,
   DIRECT_USE,
   INLINING,
 }
 
 /// Statically known use of an [Element].
 // TODO(johnniwinther): Create backend-specific implementations with better
@@ skipping 280 matching lines @@
         failedAt(element,
             "Field init element $element must be an instance or boxed field."));
     return new StaticUse.internal(element, StaticUseKind.FIELD_SET);
   }
 
   /// Read of a local function [element].
   factory StaticUse.closure(Local element) {
     return new StaticUse.internal(element, StaticUseKind.CLOSURE);
   }
 
+  /// Read of a call [method] on a closureClass.
+  factory StaticUse.callMethod(FunctionEntity method) {
+    return new StaticUse.internal(method, StaticUseKind.CALL_METHOD);
+  }
+
   /// Use of [element] through reflection.
   factory StaticUse.mirrorUse(MemberEntity element) {
     return new StaticUse.internal(element, StaticUseKind.GENERAL);
   }
 
   /// Implicit method/constructor invocation of [element] created by the
   /// backend.
   factory StaticUse.implicitInvoke(FunctionEntity element) {
     return new StaticUse.internal(element, StaticUseKind.GENERAL);
   }
@@ skipping 130 matching lines @@
       : this._(value, ConstantUseKind.DIRECT);
 
   bool operator ==(other) {
     if (identical(this, other)) return true;
     if (other is! ConstantUse) return false;
     return value == other.value;
   }
 
   String toString() => 'ConstantUse(${value.toStructuredText()},$kind)';
 }