Hoa\Exception, hack book – Hoa

This library allows to use advanced exceptions. It provides generic exceptions (that are sent over the `hoa://Event/Exception` event channel), idle exceptions (that are not sent over an event channel), uncaught exception handlers, errors to exceptions handler and group of exceptions (with transactions).
This is a companion discussion topic for the original entry at https://hoa-project.net/En/Literature/Hack/Exception.html