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diff --git a/src/DeclarationContainer.h b/src/DeclarationContainer.h
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+/*
+    This file is part of cpp-ethereum.
+
+    cpp-ethereum is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    cpp-ethereum is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Scope - object that holds declaration of names.
+ */
+
+#pragma once
+
+#include <map>
+#include <set>
+#include <boost/noncopyable.hpp>
+
+#include <libsolidity/ASTForward.h>
+
+namespace dev
+{
+namespace solidity
+{
+
+/**
+ * Container that stores mappings between names and declarations. It also contains a link to the
+ * enclosing scope.
+ */
+class DeclarationContainer
+{
+public:
+	explicit DeclarationContainer(Declaration const* _enclosingDeclaration = nullptr,
+								  DeclarationContainer const* _enclosingContainer = nullptr):
+		m_enclosingDeclaration(_enclosingDeclaration), m_enclosingContainer(_enclosingContainer) {}
+	/// Registers the declaration in the scope unless its name is already declared or the name is empty.
+	/// @param _invisible if true, registers the declaration, reports name clashes but does not return it in @a resolveName
+	/// @param _update if true, replaces a potential declaration that is already present
+	/// @returns false if the name was already declared.
+	bool registerDeclaration(Declaration const& _declaration, bool _invisible = false, bool _update = false);
+	std::vector<Declaration const*> resolveName(ASTString const& _name, bool _recursive = false) const;
+	Declaration const* getEnclosingDeclaration() const { return m_enclosingDeclaration; }
+	std::map<ASTString, std::vector<Declaration const*>> const& getDeclarations() const { return m_declarations; }
+	/// @returns whether declaration is valid, and if not also returns previous declaration.
+	Declaration const* conflictingDeclaration(Declaration const& _declaration) const;
+
+private:
+	Declaration const* m_enclosingDeclaration;
+	DeclarationContainer const* m_enclosingContainer;
+	std::map<ASTString, std::vector<Declaration const*>> m_declarations;
+	std::map<ASTString, std::vector<Declaration const*>> m_invisibleDeclarations;
+};
+
+}
+}