From a4460f6d9453bbd7e584937686449cef3e19f052 Mon Sep 17 00:00:00 2001
From: Leo Tenenbaum <pommicket@gmail.com>
Date: Mon, 20 Aug 2018 20:34:57 -0400
Subject: Initial commit

---
 src/graphcoloring/levels/value.hpp | 80 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/graphcoloring/levels/value.hpp

(limited to 'src/graphcoloring/levels/value.hpp')

diff --git a/src/graphcoloring/levels/value.hpp b/src/graphcoloring/levels/value.hpp
new file mode 100644
index 0000000..789540e
--- /dev/null
+++ b/src/graphcoloring/levels/value.hpp
@@ -0,0 +1,80 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2018 Leo Tenenbaum
+// This file is part of GraphColoring.
+//
+// GraphColoring 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.
+//
+// GraphColoring 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 GraphColoring.  If not, see <https://www.gnu.org/licenses/>.
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef GRAPHCOLORING_LEVELS_VALUE_H_
+#define GRAPHCOLORING_LEVELS_VALUE_H_
+
+
+#include "pugi/pugixml.hpp"
+#include "../graphs/graph.hpp"
+
+namespace graphcoloring {
+
+class Value {
+public:
+	typedef std::function<int(const Graph&,int,int)> operation_t;
+	Value();
+	Value(std::vector<Value> list);
+	Value(int val);
+	Value(const std::string& string);
+	Value(pugi::xml_node node);
+	virtual ~Value() {}
+	int Eval(const Graph& graph,
+		std::function<Value(std::string)> lookup_variable) const;
+	static void AddNodeToVariables(pugi::xml_node node);
+private:
+	void FromString(const std::string& string);
+	void ReadOperation(std::string op);
+	static operation_t SimpleOperation(std::function<int(int,int)> op); // For operations which don't look at the graph.
+	// Bool operations return bools.
+	static operation_t SimpleBoolOperation(std::function<bool(int,int)> op);
+	// Logical operations take bools and return bools.
+	static operation_t SimpleLogicOperation(std::function<bool(bool,bool)> op);
+	static void InitializeOperationTable();
+	std::vector<int> EvalListOperation(const Graph& graph, // Handles anything that returns a list.
+		std::function<Value(std::string)> lookup_variable) const;
+	operation_t operation;
+	static std::map<std::string, Value::operation_t> operation_table;
+	std::shared_ptr<Value> fold_start;
+	std::shared_ptr<Value> val1;
+	std::shared_ptr<Value> val2;
+	std::string variable_name;
+	int val = 0;
+	std::vector<Value> list;
+	enum class Type
+	{
+		NULL_TYPE,
+		VALUE, // This value represents a constant number
+		LIST,
+		VARIABLE,
+		NUMBER_OF_VERTICES,
+		NUMBER_OF_EDGES,
+		VERTICES,
+		EDGES,
+		OPERATION,
+		LIST_OPERATION,
+		MAP,
+		ZIP,
+		FOLD
+	};
+	Type type;
+};
+
+} // namespace graphcoloring
+
+#endif // GRAPHCOLORING_LEVELS_VALUE_H_
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