/interpreter/tags/at2dist110511/src/edu/vub/at/exceptions/signals/Signal.java

http://ambienttalk.googlecode.com/ · Java · 45 lines · 3 code · 2 blank · 40 comment · 0 complexity · 6bfc80be04ad4abc055e87be78bdd454 MD5 · raw file

  1. /**
  2. * AmbientTalk/2 Project
  3. * Signal.java created on 31-okt-2006 at 12:29:13
  4. * (c) Programming Technology Lab, 2006 - 2007
  5. * Authors: Tom Van Cutsem & Stijn Mostinckx
  6. *
  7. * Permission is hereby granted, free of charge, to any person
  8. * obtaining a copy of this software and associated documentation
  9. * files (the "Software"), to deal in the Software without
  10. * restriction, including without limitation the rights to use,
  11. * copy, modify, merge, publish, distribute, sublicense, and/or
  12. * sell copies of the Software, and to permit persons to whom the
  13. * Software is furnished to do so, subject to the following
  14. * conditions:
  15. *
  16. * The above copyright notice and this permission notice shall be
  17. * included in all copies or substantial portions of the Software.
  18. *
  19. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  21. * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  23. * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  24. * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  25. * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26. * OTHER DEALINGS IN THE SOFTWARE.
  27. */
  28. package edu.vub.at.exceptions.signals;
  29. /**
  30. * @author tvcutsem
  31. *
  32. * Signal is the abstract superclass of all AT/2 interpreter Signals.
  33. *
  34. * Signals are exceptions which *cannot* be caught at the AmbientTalk base-level.
  35. * They cannot even be caught at the meta-level, but are accessible to the implementation only.
  36. *
  37. * Signals pervade the AT/2 interpreter, which is why they are declared to be unchecked exceptions,
  38. * i.e. they subclass RuntimeException. This signifies that these exceptions should always be
  39. * caught by the lowest-level evaluation loops in the runtime, such that they cannot cause the
  40. * interpreter to crash unexpectedly.
  41. */
  42. public abstract class Signal extends RuntimeException {
  43. }