Make exceptions easier to translate to error codes

Avoid throwing base Botan::Exception type, as it is difficult to
determine what the error is in that case.

Add Exception::error_code and Exception::error_type which allows
(for error code) more information about the error and (for error type)
allows knowing the error type without requiring a sequence of catches.

See GH #1742

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/tls/tls_text_policy.cpp b/src/lib/tls/tls_text_policy.cpp
index 5c7a4b278..829899fbc 100644
--- a/src/lib/tls/tls_text_policy.cpp
+++ b/src/lib/tls/tls_text_policy.cpp
@@ -283,7 +283,7 @@ bool Text_Policy::get_bool(const std::string& key, bool def) const
       }
    else
       {
-      throw Exception("Invalid boolean '" + v + "'");
+      throw Decoding_Error("Invalid boolean '" + v + "'");
       }
    }