Implement new optional parameters syntax in the vm (issue 4290).

runtime/vm/flow_graph_builder.h

 // 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.
 
 #ifndef VM_FLOW_GRAPH_BUILDER_H_
 #define VM_FLOW_GRAPH_BUILDER_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 29 matching lines @@
 
   // Each try in this function gets its own try index.
   intptr_t AllocateTryIndex() { return ++last_used_try_index_; }
 
   // Manage the currently active try index.
   void set_try_index(intptr_t value) { try_index_ = value; }
   intptr_t try_index() const { return try_index_; }
 
   void AddCatchEntry(TargetEntryInstr* entry);
 
-  intptr_t copied_parameter_count() const {
-    return copied_parameter_count_;
+  intptr_t num_copied_params() const {
+    return num_copied_params_;
   }
-  intptr_t non_copied_parameter_count() const {
-    return non_copied_parameter_count_;
+  intptr_t num_non_copied_params() const {
+    return num_non_copied_params_;
   }
-  intptr_t stack_local_count() const {
-    return stack_local_count_;
+  intptr_t num_stack_locals() const {
+    return num_stack_locals_;
   }
 
   bool InInliningContext() const { return inlining_context_ != kNotInlining; }
   void AddReturnExit(ReturnInstr* return_instr) {
     if (InInliningContext()) {
       ASSERT(exits_ != NULL);
       exits_->Add(return_instr);
     }
   }
 
  private:
   intptr_t parameter_count() const {
-    return copied_parameter_count_ + non_copied_parameter_count_;
+    return num_copied_params_ + num_non_copied_params_;
   }
   intptr_t variable_count() const {
-    return parameter_count() + stack_local_count_;
+    return parameter_count() + num_stack_locals_;
   }
 
   const ParsedFunction& parsed_function_;
 
-  const intptr_t copied_parameter_count_;
-  const intptr_t non_copied_parameter_count_;
-  const intptr_t stack_local_count_;  // Does not include any parameters.
+  const intptr_t num_copied_params_;
+  const intptr_t num_non_copied_params_;
+  const intptr_t num_stack_locals_;  // Does not include any parameters.
 
   intptr_t context_level_;
   intptr_t last_used_try_index_;
   intptr_t try_index_;
   GraphEntryInstr* graph_entry_;
   InliningContext inlining_context_;
   ZoneGrowableArray<ReturnInstr*>* exits_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FlowGraphBuilder);
 };
@@ skipping 288 matching lines @@
   // Output parameters.
   GrowableArray<TargetEntryInstr**> true_successor_addresses_;
   GrowableArray<TargetEntryInstr**> false_successor_addresses_;
 
   intptr_t condition_token_pos_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_BUILDER_H_