Revert "Remove join function; the code is long and I don't think anybody"

It turns out Carsten uses it :)

This reverts commit bd5e8b83a3a18787241982efdae809d4db21f65d.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/lib/exceptions.h b/src/lib/exceptions.h
index 769857fd3..eceafa105 100644
--- a/src/lib/exceptions.h
+++ b/src/lib/exceptions.h
@@ -81,6 +81,14 @@ private:
 	boost::filesystem::path _file;
 };
 
+class JoinError : public std::runtime_error
+{
+public:
+	explicit JoinError (std::string s)
+		: std::runtime_error (s)
+	{}
+};
+
 /** @class OpenFileError.
  *  @brief Indicates that some error occurred when trying to open a file.
  */