Make hidden initializing formal parameters invisible to the debugger

runtime/vm/scopes.cc

 // 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.
 
 #include "vm/scopes.h"
 
 #include "vm/ast.h"
 #include "vm/bit_vector.h"
 #include "vm/object.h"
 #include "vm/parser.h"
@@ skipping 202 matching lines @@
 }
 
 
 // The parser creates internal variables that start with ":"
 static bool IsInternalIdentifier(const String& str) {
   ASSERT(str.Length() > 0);
   return str.CharAt(0) == ':';
 }
 
 
-// Add variables that are declared in this scope to vars, then collect
-// variables of children, followed by siblings.
+// Add visible variables that are declared in this scope to vars, then
+// collect visible variables of children, followed by siblings.
 void LocalScope::CollectLocalVariables(GrowableArray<VarDesc>* vars,
                                        int16_t* scope_id) {
   (*scope_id)++;
   if (HasContextLevel() &&
       ((parent() == NULL) ||
       (!parent()->HasContextLevel()) ||
       (parent()->context_level() != context_level()))) {
     // This is the outermost scope with a context level or this scope's
     // context level differs from its parent's level.
     VarDesc desc;
     desc.name = &String::Handle();  // No name.
     desc.info.kind =  RawLocalVarDescriptors::kContextLevel;
     desc.info.scope_id = *scope_id;
     desc.info.begin_pos = begin_token_pos();
     desc.info.end_pos = end_token_pos();
     desc.info.index = context_level();
     vars->Add(desc);
   }
   for (int i = 0; i < this->variables_.length(); i++) {
     LocalVariable* var = variables_[i];
-    if (var->owner() == this) {
+    if ((var->owner() == this) && !var->is_invisible()) {
       if (!IsInternalIdentifier(var->name())) {
         // This is a regular Dart variable, either stack-based or captured.
         VarDesc desc;
         desc.name = &var->name();
         if (var->is_captured()) {
           desc.info.kind = RawLocalVarDescriptors::kContextVar;
           ASSERT(var->owner() != NULL);
           ASSERT(var->owner()->context_level() >= 0);
           desc.info.scope_id = var->owner()->context_level();
         } else {
@@ skipping 344 matching lines @@
     return fixed_parameter_count - (index() - kParamEndSlotFromFp);
   } else {
     // Shift negative indexes so that the lowest one is 0 (they are still
     // non-positive).
     return fixed_parameter_count - (index() - kFirstLocalSlotFromFp);
   }
 }
 
 
 }  // namespace dart