[kernel] Debugging of switch statement

runtime/vm/kernel.h

 // Copyright (c) 2016, 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.
 
 #ifndef RUNTIME_VM_KERNEL_H_
 #define RUNTIME_VM_KERNEL_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 #include "platform/assert.h"
 #include "vm/allocation.h"
@@ skipping 988 matching lines @@
  public:
   static Expression* ReadFrom(Reader* reader);
 
   virtual ~Expression();
 
   DEFINE_CASTING_OPERATIONS(Expression);
 
   virtual void AcceptTreeVisitor(TreeVisitor* visitor);
   virtual void AcceptExpressionVisitor(ExpressionVisitor* visitor) = 0;
   TokenPosition position() { return position_; }
+  void set_position(TokenPosition position) { position_ = position; }
 
  protected:
   Expression() : position_(TokenPosition::kNoSource) {}
   TokenPosition position_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Expression);
 };
 
 
@@ skipping 2222 matching lines @@
 
 kernel::Program* ReadPrecompiledKernelFromBuffer(const uint8_t* buffer,
                                                  intptr_t buffer_length);
 
 
 
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_H_