Squashed 'kiwi/' content from commit 268028e

git-subtree-dir: kiwi
git-subtree-split: 268028ee4a694dcd89e4b1e683bf2f9ac48c08d9

kiwi/symbol.h

@@ -0,0 +1,68 @@
+/*-----------------------------------------------------------------------------
+| Copyright (c) 2013-2017, Nucleic Development Team.
+|
+| Distributed under the terms of the Modified BSD License.
+|
+| The full license is in the file LICENSE, distributed with this software.
+|----------------------------------------------------------------------------*/
+#pragma once
+
+
+namespace kiwi
+{
+
+namespace impl
+{
+
+class Symbol
+{
+
+public:
+
+	using Id = unsigned long long;
+
+	enum Type
+	{
+		Invalid,
+		External,
+		Slack,
+		Error,
+		Dummy
+	};
+
+	Symbol() : m_id( 0 ), m_type( Invalid ) {}
+
+	Symbol( Type type, Id id ) : m_id( id ), m_type( type ) {}
+
+	~Symbol() = default;
+
+	Id id() const
+	{
+		return m_id;
+	}
+
+	Type type() const
+	{
+		return m_type;
+	}
+
+private:
+
+	Id m_id;
+	Type m_type;
+
+	friend bool operator<( const Symbol& lhs, const Symbol& rhs )
+	{
+		return lhs.m_id < rhs.m_id;
+	}
+
+	friend bool operator==( const Symbol& lhs, const Symbol& rhs )
+	{
+		return lhs.m_id == rhs.m_id;
+	}
+
+};
+
+} // namespace impl
+
+} // namespace kiwi