edu.vub.at.exceptions.signals
Class Signal

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              edu.vub.at.exceptions.signals.Signal

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

SignalEscape

public abstract class Signal

extends java.lang.RuntimeException

Author:

tvcutsem Signal is the abstract superclass of all AT/2 interpreter Signals. Signals are exceptions which *cannot* be caught at the AmbientTalk base-level. They cannot even be caught at the meta-level, but are accessible to the implementation only. Signals pervade the AT/2 interpreter, which is why they are declared to be unchecked exceptions, i.e. they subclass RuntimeException. This signifies that these exceptions should always be caught by the lowest-level evaluation loops in the runtime, such that they cannot cause the interpreter to crash unexpectedly.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.lang.RuntimeException

Fields inherited from class java.lang.Throwable

Constructor Summary

Signal()

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Signal

public Signal()