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, 6 insertions, 0 deletions

diff --git a/src/tests/tests.h b/src/tests/tests.h
index fddf44aaf..333cbee98 100644
--- a/src/tests/tests.h
+++ b/src/tests/tests.h
@@ -39,6 +39,12 @@ using Botan::byte;
 using Botan::BigInt;
 #endif
 
+class Test_Error : public Botan::Exception
+   {
+   public:
+      Test_Error(const std::string& what) : Exception("Test error", what) {}
+   };
+
 /*
 * A generic test which retuns a set of results when run.
 * The tests may not all have the same type (for example test