Proposal of catch error

Golang2.md

I like proposal with:

• #name - invoke a handler by name
• catch name {...} - define a handler

It solved many situations, but i think can be improved with panic and return state, like in proposal:

func returnError() error {
    return errors.New()
}

#*   := returnError()    // alias return error
#!   := returnError()    // alias panic(error)

Because it is will be decreased user code(user need write this manual) in all situations, and code will be clear and understandable, and this will solve error tracing