Squashed 'third_party/boostorg/property_tree/' content from commit bdfe275

Change-Id: I075a5e242aaddc356ecc81e756c4a0907fc38130
git-subtree-dir: third_party/boostorg/property_tree
git-subtree-split: bdfe275d172ac30bc5e89a6375a5a64dea20b3c0
diff --git a/include/boost/property_tree/exceptions.hpp b/include/boost/property_tree/exceptions.hpp
new file mode 100644
index 0000000..b35b27f
--- /dev/null
+++ b/include/boost/property_tree/exceptions.hpp
@@ -0,0 +1,86 @@
+// ----------------------------------------------------------------------------
+// Copyright (C) 2002-2006 Marcin Kalicinski
+// Copyright (C) 2009 Sebastian Redl
+//
+// Distributed under 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)
+//
+// For more information, see www.boost.org
+// ----------------------------------------------------------------------------
+
+#ifndef BOOST_PROPERTY_TREE_EXCEPTIONS_HPP_INCLUDED
+#define BOOST_PROPERTY_TREE_EXCEPTIONS_HPP_INCLUDED
+
+#include <boost/property_tree/ptree_fwd.hpp>
+
+#include <boost/any.hpp>
+#include <string>
+#include <stdexcept>
+
+namespace boost { namespace property_tree
+{
+
+    /// Base class for all property tree errors. Derives from
+    /// @c std::runtime_error. Call member function @c what to get human
+    /// readable message associated with the error.
+    class ptree_error : public std::runtime_error
+    {
+    public:
+        /// Instantiate a ptree_error instance with the given message.
+        /// @param what The message to associate with this error.
+        ptree_error(const std::string &what);
+
+        ~ptree_error() throw();
+    };
+
+
+    /// Error indicating that translation from given value to the property tree
+    /// data_type (or vice versa) failed. Derives from ptree_error.
+    class ptree_bad_data : public ptree_error
+    {
+    public:
+        /// Instantiate a ptree_bad_data instance with the given message and
+        /// data.
+        /// @param what The message to associate with this error.
+        /// @param data The value associated with this error that was the source
+        ///             of the translation failure.
+        template<class T> ptree_bad_data(const std::string &what,
+                                         const T &data);
+
+        ~ptree_bad_data() throw();
+
+        /// Retrieve the data associated with this error. This is the source
+        /// value that failed to be translated. You need to explicitly
+        /// specify its type.
+        template<class T> T data() const;
+    private:
+        boost::any m_data;
+    };
+
+
+    /// Error indicating that specified path does not exist. Derives from
+    /// ptree_error.
+    class ptree_bad_path : public ptree_error
+    {
+    public:
+        /// Instantiate a ptree_bad_path with the given message and path data.
+        /// @param what The message to associate with this error.
+        /// @param path The path that could not be found in the property_tree.
+        template<class T> ptree_bad_path(const std::string &what,
+                                         const T &path);
+
+        ~ptree_bad_path() throw();
+
+        /// Retrieve the invalid path. You need to explicitly specify the
+        /// type of path.
+        template<class T> T path() const;
+    private:
+        boost::any m_path;
+    };
+
+}}
+
+#include <boost/property_tree/detail/exception_implementation.hpp>
+
+#endif