X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fstrings%2Ffmt.h;h=8633324b5c0d323d272a194d5e9c68716093b671;hb=fe8c3e73b5d9147d400c2b7d2e35ebfc64fc7b9d;hp=ba75958802b7760b6f6b352827e4f313048e717f;hpb=b42ed73a1b241c0e93ee03c43c4584b41c549bac;p=libs%2Fcore.git

diff --git a/source/strings/fmt.h b/source/strings/fmt.h
index ba75958..8633324 100644
--- a/source/strings/fmt.h
+++ b/source/strings/fmt.h
@@ -9,10 +9,19 @@ Distributed under the LGPL
 #define MSP_STRINGS_FMT_H_
 
 #include <ostream>
+#include <stdexcept>
 #include <string>
 
 namespace Msp {
 
+class format_error: public std::logic_error
+{
+public:
+	format_error(const std::string &w): std::logic_error(w) { }
+	virtual ~format_error() throw() { }
+};
+
+
 /**
 Stores formatting information for converting variables into strings.  Can be
 applied to an std::ostream or fed to lexical_cast.  Also used internally by