Refactor Optimiser Steps Interface.

libyul/optimiser/OptimiserStep.h

@@ -0,0 +1,65 @@
+/*
+	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/>.
+*/
+
+#pragma once
+
+#include <libyul/Exceptions.h>
+
+#include <string>
+#include <set>
+
+namespace yul
+{
+
+struct Dialect;
+struct Block;
+class YulString;
+class NameDispenser;
+
+struct OptimiserStepContext
+{
+	Dialect const& dialect;
+	NameDispenser& dispenser;
+	std::set<YulString> const& reservedIdentifiers;
+};
+
+
+/**
+ * Construction to create dynamically callable objects out of the
+ * statically callable optimiser steps.
+ */
+struct OptimiserStep
+{
+	explicit OptimiserStep(std::string _name): name(std::move(_name)) {}
+	virtual ~OptimiserStep() = default;
+
+	virtual void run(OptimiserStepContext&, Block&) const = 0;
+	std::string name;
+};
+
+template <class Step>
+struct OptimiserStepInstance: public OptimiserStep
+{
+	OptimiserStepInstance(): OptimiserStep{Step::name} {}
+	void run(OptimiserStepContext& _context, Block& _ast) const override
+	{
+		Step::run(_context, _ast);
+	}
+};
+
+
+}