Problem

Currently in the runtime core all exceptions are the same (std::runtime_error) with different message. Because of that it is not possible (without comparing message string) to distinguish these errors in the API component. Right now the API returns NNFW_STATUS_ERROR almost everywhere which makes error handling hard (the user of the API can not act differently on different errors).

Proposition

Improve error handling by creating specific errors based on the std::runtime_error. Then the list of possible errors in the API can be extended and instead of returning NNFW_STATUS_ERROR almost everywhere, dedicated error codes could be returned.

If you are OK with such change I can try to implement that.