Exception Handler

[jtrunick]

Being able to specify an exception handler would be very useful for my case.

[sovelten]

Can you specify what kind of use case you would like to support?

The current expectation is that whenever we use api/eval or equivalent, if any uncaught exception happens within a node, this exception is going to bubble up to the caller, so you could just wrap eval within a try/catch block.

If you want to an exception to be handled in a specific node you can also put the try/catch within the node definition.

[jtrunick]

A handler might decide to ignore the error and return a default value, or might collect multiple exceptions and throw them when finished. I'd prefer to centralize that w/o wrapping each node definition.