[parser]: Skipping inner funcs / initial implemetation of storing scope analysis data from preparse…

src/parsing/preparsed-scope-data.cc

Index: src/parsing/preparsed-scope-data.cc
diff --git a/src/parsing/preparsed-scope-data.cc b/src/parsing/preparsed-scope-data.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ef69f805104ab3ee471be71aceb9a433fa47b3a1
--- /dev/null
+++ b/src/parsing/preparsed-scope-data.cc
@@ -0,0 +1,39 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/parsing/preparsed-scope-data.h"
+
+namespace v8 {
+namespace internal {
+
+PreParsedScopeData::ScopeScope::ScopeScope(PreParsedScopeData* data,
+                                           ScopeType scope_type,
+                                           int start_position, int end_position)
+    : data_(data),
+      previous_scope_(data->current_scope_),
+      inner_scope_count_(0),
+      variable_count_(0) {
+  data->current_scope_ = this;
+  if (previous_scope_ != nullptr) {
+    ++previous_scope_->inner_scope_count_;

[jochen (gone - plz use gerrit), 2017/01/25 11:16:01]

inner_scope_count_ is just one-level down, right? It's not all inner scopes
count

[marja, 2017/01/25 11:50:28]

Yes. Why?

[jochen (gone - plz use gerrit), 2017/01/25 12:01:22]

just wanted to verify I understood the code correctly

+  }
+
+  data->backing_store_.push_back(scope_type);
+  data->backing_store_.push_back(start_position);
+  data->backing_store_.push_back(end_position);
+  // Reserve space for variable and inner scope count (we don't know yet how
+  // many will be added).
+  index_in_data_ = data->backing_store_.size();
+  data->backing_store_.push_back(0);

[jochen (gone - plz use gerrit), 2017/01/25 11:16:01]

maybe use -1, so it's easier to debug... right now, zero is a valid number for
number of vars (eg)

[marja, 2017/01/25 11:50:28]

Done.

+  data->backing_store_.push_back(0);
+}
+
+PreParsedScopeData::ScopeScope::~ScopeScope() {
+  data_->current_scope_ = previous_scope_;
+  data_->backing_store_[index_in_data_] = inner_scope_count_;
+  data_->backing_store_[index_in_data_ + 1] = variable_count_;
+}
+
+}  // namespace internal
+}  // namespace v8