1 files changed, 78 insertions, 0 deletions
diff --git a/tools/quickbook/src/string_ref.hpp b/tools/quickbook/src/string_ref.hpp
new file mode 100644
index 0000000000..b712006790
--- /dev/null
+++ b/tools/quickbook/src/string_ref.hpp
@@ -0,0 +1,78 @@
+/*=============================================================================
+    Copyright (c) 2011 Daniel James
+
+    Use, modification and distribution is subject to the Boost Software
+    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+    http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+
+#if !defined(BOOST_QUICKBOOK_STRING_REF_HPP)
+#define BOOST_QUICKBOOK_STRING_REF_HPP
+
+#include <boost/operators.hpp>
+#include <string>
+#include <iosfwd>
+
+namespace quickbook
+{
+    struct string_ref
+        : boost::less_than_comparable<string_ref,
+            boost::less_than_comparable<string_ref, std::string,
+            boost::equality_comparable<string_ref,
+            boost::equality_comparable<string_ref, std::string> > > >
+    {
+    public:
+        typedef std::string::const_iterator iterator;
+        typedef std::string::const_iterator const_iterator;
+
+    private:
+        iterator begin_, end_;
+
+    public:
+        string_ref() : begin_(), end_() {}
+
+        explicit string_ref(iterator b, iterator e)
+            : begin_(b), end_(e) {}
+
+        explicit string_ref(std::string const& x)
+            : begin_(x.begin()), end_(x.end()) {}
+
+        operator std::string() const {
+            return std::string(begin_, end_);
+        }
+
+        iterator begin() const { return begin_; }
+        iterator end() const { return end_; }
+
+        std::size_t size() const
+        {
+            return static_cast<std::size_t>(end_ - begin_);
+        }
+
+        bool empty() const
+        {
+            return begin_ == end_;
+        }
+    };
+
+    bool operator==(string_ref const& x, string_ref const& y);
+    bool operator<(string_ref const& x, string_ref const& y);
+    std::ostream& operator<<(std::ostream&, string_ref const& x);
+
+    inline bool operator==(string_ref const& x, std::string const& y)
+    {
+        return x == string_ref(y);
+    }
+
+    inline bool operator<(string_ref const& x, std::string const& y)
+    {
+        return x < string_ref(y);
+    }
+
+    inline bool operator>(string_ref const& x, std::string const& y)
+    {
+        return x > string_ref(y);
+    }
+}
+
+#endif