1 files changed, 66 insertions, 0 deletions
diff --git a/deps/v8/src/ast/scopes-inl.h b/deps/v8/src/ast/scopes-inl.h
new file mode 100644
index 0000000000..a70166c5ca
--- /dev/null
+++ b/deps/v8/src/ast/scopes-inl.h
@@ -0,0 +1,66 @@
+// Copyright 2018 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.
+
+#ifndef V8_AST_SCOPES_INL_H_
+#define V8_AST_SCOPES_INL_H_
+
+#include "src/ast/scopes.h"
+
+namespace v8 {
+namespace internal {
+
+template <typename T>
+void Scope::ResolveScopesThenForEachVariable(DeclarationScope* max_outer_scope,
+                                             T variable_proxy_stackvisitor,
+                                             ParseInfo* info) {
+  // Module variables must be allocated before variable resolution
+  // to ensure that UpdateNeedsHoleCheck() can detect import variables.
+  if (info != nullptr && is_module_scope()) {
+    AsModuleScope()->AllocateModuleVariables();
+  }
+  // Lazy parsed declaration scopes are already partially analyzed. If there are
+  // unresolved references remaining, they just need to be resolved in outer
+  // scopes.
+  Scope* lookup =
+      is_declaration_scope() && AsDeclarationScope()->was_lazily_parsed()
+          ? outer_scope()
+          : this;
+
+  for (VariableProxy *proxy = unresolved_list_.first(), *next = nullptr;
+       proxy != nullptr; proxy = next) {
+    next = proxy->next_unresolved();
+
+    DCHECK(!proxy->is_resolved());
+    Variable* var =
+        lookup->LookupRecursive(info, proxy, max_outer_scope->outer_scope());
+    if (var == nullptr) {
+      variable_proxy_stackvisitor(proxy);
+    } else if (var != Scope::kDummyPreParserVariable &&
+               var != Scope::kDummyPreParserLexicalVariable) {
+      if (info != nullptr) {
+        // In this case we need to leave scopes in a way that they can be
+        // allocated. If we resolved variables from lazy parsed scopes, we need
+        // to context allocate the var.
+        ResolveTo(info, proxy, var);
+        if (!var->is_dynamic() && lookup != this) var->ForceContextAllocation();
+      } else {
+        var->set_is_used();
+        if (proxy->is_assigned()) var->set_maybe_assigned();
+      }
+    }
+  }
+
+  // Clear unresolved_list_ as it's in an inconsistent state.
+  unresolved_list_.Clear();
+
+  for (Scope* scope = inner_scope_; scope != nullptr; scope = scope->sibling_) {
+    scope->ResolveScopesThenForEachVariable(max_outer_scope,
+                                            variable_proxy_stackvisitor, info);
+  }
+}
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_AST_SCOPES_INL_H_