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+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include <string>
+#include <unordered_set>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+
+namespace solar {
+
+class state_t {
+private:
+	struct sym_t {
+		virtual ~sym_t() {}
+	};
+
+	struct nonterm_sym_t : public sym_t {
+		std::string value;
+
+		nonterm_sym_t(const std::string &value0) : value(value0) {}
+	};
+
+	struct term_sym_t : public sym_t {
+		std::string value;
+
+		term_sym_t(const std::string &value0) : value(value0) {}
+	};
+
+	struct char_sym_t : public sym_t {
+		unsigned char value;
+
+		char_sym_t(unsigned char value0) : value(value0) {}
+	};
+
+
+	typedef std::vector<sym_t> rhs_t;
+
+	std::unordered_set<std::string> terminals;
+	std::unordered_multimap<std::string, rhs_t> rules;
+
+	std::string current_nonterm;
+	rhs_t current_rule;
+
+public:
+	void openRule(const std::string &nonterm);
+	void addRuleTerminal(const std::string &term);
+	void addRuleTerminal(unsigned char term);
+	void addRuleNonterminal(const std::string &nonterm);
+	void closeRule();
+};
+
+}