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, 2 insertions, 2 deletions

diff --git a/src/tests/test_mceliece.cpp b/src/tests/test_mceliece.cpp
index a2cf5bf8f..88379f2ea 100644
--- a/src/tests/test_mceliece.cpp
+++ b/src/tests/test_mceliece.cpp
@@ -103,7 +103,7 @@ class McEliece_Tests : public Test
          {
          std::unique_ptr<Botan::HashFunction> hash(Botan::HashFunction::create(hash_algo));
          if(!hash)
-            throw std::runtime_error("Hash " + hash_algo + " not available");
+            throw Test_Error("Hash " + hash_algo + " not available");
 
          hash->update(key.pkcs8_private_key());
          return Botan::hex_encode(hash->final());
@@ -113,7 +113,7 @@ class McEliece_Tests : public Test
          {
          std::unique_ptr<Botan::HashFunction> hash(Botan::HashFunction::create(hash_algo));
          if(!hash)
-            throw std::runtime_error("Hash " + hash_algo + " not available");
+            throw Test_Error("Hash " + hash_algo + " not available");
 
          hash->update(key.x509_subject_public_key());
          return Botan::hex_encode(hash->final());