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diff --git a/libjulia/optimiser/InlinableExpressionFunctionFinder.h b/libjulia/optimiser/InlinableExpressionFunctionFinder.h
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+/*
+ This file is part of solidity.
+
+ solidity 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.
+
+ solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * Optimiser component that identifies functions to be inlined.
+ */
+
+#pragma once
+
+#include <libjulia/ASTDataForward.h>
+#include <libjulia/optimiser/ASTWalker.h>
+
+#include <libsolidity/interface/Exceptions.h>
+
+#include <set>
+
+namespace dev
+{
+namespace julia
+{
+
+/**
+ * Optimiser component that finds functions that can be
+ * inlined inside functional expressions, i.e. functions that
+ * - have a single return parameter r
+ * - have a body like r := <functional expression>
+ * - neither reference themselves nor r in the right hand side
+ *
+ * This component can only be used on sources with unique names.
+ */
+class InlinableExpressionFunctionFinder: public ASTWalker
+{
+public:
+
+ std::map<std::string, FunctionDefinition const*> const& inlinableFunctions() const
+ {
+ return m_inlinableFunctions;
+ }
+
+ using ASTWalker::operator();
+ virtual void operator()(Identifier const& _identifier) override;
+ virtual void operator()(FunctionCall const& _funCall) override;
+ virtual void operator()(FunctionDefinition const& _function) override;
+
+private:
+ void checkAllowed(std::string const& _name)
+ {
+ if (m_disallowedIdentifiers.count(_name))
+ m_foundDisallowedIdentifier = true;
+ }
+
+ bool m_foundDisallowedIdentifier = false;
+ std::set<std::string> m_disallowedIdentifiers;
+ std::map<std::string, FunctionDefinition const*> m_inlinableFunctions;
+};
+
+}
+}