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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
+ * Routines used by both the compiler and the expression compiler.
+ */
+
+#pragma once
+
+#include <libsolidity/CompilerContext.h>
+#include <libsolidity/ASTForward.h>
+
+namespace dev {
+namespace solidity {
+
+class Type; // forward
+
+class CompilerUtils
+{
+public:
+	CompilerUtils(CompilerContext& _context): m_context(_context) {}
+
+	/// Moves the value that is at the top of the stack to a stack variable.
+	void moveToStackVariable(VariableDeclaration const& _variable);
+	/// Copies a variable of type @a _type from a stack depth of @a _stackDepth to the top of the stack.
+	void copyToStackTop(unsigned _stackDepth, Type const& _type);
+	/// Removes the current value from the top of the stack.
+	void popStackElement(Type const& _type);
+
+	template <class T>
+	static unsigned getSizeOnStack(std::vector<T> const& _variables);
+	static unsigned getSizeOnStack(std::vector<std::shared_ptr<Type const>> const& _variableTypes);
+
+private:
+	CompilerContext& m_context;
+};
+
+template <class T>
+unsigned CompilerUtils::getSizeOnStack(std::vector<T> const& _variables)
+{
+	unsigned size = 0;
+	for (T const& variable: _variables)
+		size += variable->getType()->getSizeOnStack();
+	return size;
+}
+
+}
+}