I'm trying to use protobuf with PyPy and I've been quite successful doing
so with cppyy.
I generated the protobuf in C++ and used reflex to generate the bindings.
I've encountered some problems that I don't know how to deal with and the
documentation doesn't describe what you can do to resolve them.
I discovered that If you don't specify --deep when generating the reflex
bindings and you try to pass a string to the C++ side you get a segfault.
I'm guessing that's a bug.
I can't catch exceptions that are being raised from C++ (it's also
undocumented).
I ensured that protobuf's FatalException has reflex bindings but the
process crashes on an exception.
e.SerializeAsString()
[libprotobuf FATAL google/protobuf/message_lite.cc:273] CHECK failed:
IsInitialized(): Can't serialize message of type "MyProtobufType" because
it is missing required fields: header
terminate called after throwing an instance of
'google::protobuf::FatalException'
what(): CHECK failed: IsInitialized(): Can't serialize message of type
"MyProtobufType" because it is missing required fields: header
Aborted (core dumped)
How can I catch that exception?
The documentation is unclear how you can pass a pointer to a Python
variable e.g.:
str = ""
e.SerializeToString(str)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-7-993880892d74> in <module>()
----> 1 e.SerializeToString(str)
TypeError: none of the 5 overloaded methods succeeded. Full details:
bool google::protobuf::MessageLite::SerializeToString(std::string*) =>
TypeError: cannot pass str as basic_string<char>
bool google::protobuf::MessageLite::SerializeToString(std::string*) =>
TypeError: cannot pass str as basic_string<char>
bool google::protobuf::MessageLite::SerializeToString(std::string*) =>
TypeError: cannot pass str as basic_string<char>
bool google::protobuf::MessageLite::SerializeToString(std::string*) =>
TypeError: cannot pass str as basic_string<char>
bool google::protobuf::MessageLite::SerializeToString(std::string*) =>
TypeError: cannot pass str as basic_string<char>
Best Regards,
Omer Katz.
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