Reroot the exception hierarchy into a toplevel Exception class

As the alternatives are unfortunate for applications trying to catch
all library errors, and it seems deriving from std::runtime_error
causes problems with MSVC DLLs (GH #340)

Effectively reverts 2837e915d82e43

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/modes/cfb/cfb.cpp b/src/lib/modes/cfb/cfb.cpp
index 7c7ed1865..6c9239e73 100644
--- a/src/lib/modes/cfb/cfb.cpp
+++ b/src/lib/modes/cfb/cfb.cpp
@@ -16,7 +16,7 @@ CFB_Mode::CFB_Mode(BlockCipher* cipher, size_t feedback_bits) :
    m_feedback_bytes(feedback_bits ? feedback_bits / 8 : cipher->block_size())
    {
    if(feedback_bits % 8 || feedback() > cipher->block_size())
-      throw std::invalid_argument(name() + ": feedback bits " +
+      throw Invalid_Argument(name() + ": feedback bits " +
                                   std::to_string(feedback_bits) + " not supported");
    }