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diff --git a/liblll/CompilerState.h b/liblll/CompilerState.h
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+++ b/liblll/CompilerState.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/>.
+*/
+/** @file CompilerState.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2014
+ */
+
+#pragma once
+
+#include <boost/spirit/include/support_utree.hpp>
+#include "CodeFragment.h"
+
+namespace dev
+{
+namespace eth
+{
+
+struct Macro
+{
+	std::vector<std::string> args;
+	boost::spirit::utree code;
+	std::map<std::string, CodeFragment> env;
+};
+
+struct CompilerState
+{
+	CompilerState();
+
+	CodeFragment const& getDef(std::string const& _s);
+	void populateStandard();
+
+	unsigned stackSize = 128;
+	std::map<std::string, std::pair<unsigned, unsigned>> vars;       ///< maps name to stack offset & size.
+	std::map<std::string, CodeFragment> defs;
+	std::map<std::string, CodeFragment> args;
+	std::map<std::string, CodeFragment> outers;
+	std::map<std::pair<std::string, unsigned>, Macro> macros;
+	std::vector<boost::spirit::utree> treesToKill;
+	bool usedAlloc = false;
+};
+
+}
+}