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diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.h b/Userland/DevTools/HackStudio/LanguageServers/Cpp/ParserAutoComplete.h
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+/*
+ * Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "LibCpp/AST.h"
+#include <AK/String.h>
+#include <AK/Vector.h>
+#include <DevTools/HackStudio/AutoCompleteResponse.h>
+#include <LibCpp/Parser.h>
+#include <LibGUI/TextPosition.h>
+
+namespace LanguageServers::Cpp {
+
+using namespace ::Cpp;
+
+class ParserAutoComplete {
+public:
+    ParserAutoComplete(const String& code);
+
+    Vector<GUI::AutocompleteProvider::Entry> get_suggestions(const GUI::TextPosition& autocomplete_position) const;
+
+private:
+    Vector<GUI::AutocompleteProvider::Entry> autocomplete_property(const MemberExpression&, const StringView partial_text) const;
+    Vector<GUI::AutocompleteProvider::Entry> autocomplete_identifier(const ASTNode&) const;
+    String type_of(const Expression&) const;
+    String type_of_property(const Identifier&) const;
+    String type_of_variable(const Identifier&) const;
+    bool is_property(const ASTNode&) const;
+    bool is_empty_property(const ASTNode&, const Position& autocomplete_position) const;
+
+    struct PropertyInfo {
+        StringView name;
+        RefPtr<Type> type;
+    };
+    Vector<PropertyInfo> properties_of_type(const String& type) const;
+
+private:
+    String m_code;
+    Cpp::Parser m_parser;
+};
+
+}