Introduction
MXNet currently has support for handling dmlc::Error exceptions in the backend and propagating them to frontend for both the operators and the iterators case.
Improved Exception Types for the Backend
Currently, there are only three exceptions available for MXNet C++ backend: dmlc::Error, InferTypeError (inherits from dmlc::Error) and InferShapeError(inherits from dmlc::Error).
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and https://github.com/apache/incubator-mxnet/blob/master/src/operator/operator_common.h#L85
Improved Exception Types for the Frontend Language Bindings - (Python, Scala, Perl..)
Will require a mapping of error codes and corresponding frontend exceptions.
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Frontend exception checking for Python example: https://github.com/apache/incubator-mxnet/blob/master/python/mxnet/base.py#L137
Support for handling exception thrown from consumed libraries
Currently we are handling only dmlc::Error and terminating the process for other exceptions. Once we have finished the above two tasks,
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and std::exception are handled and propagated to frontend.