/interpreter/tags/at2dist130208/src/edu/vub/at/objects/ATNil.java

http://ambienttalk.googlecode.com/ · Java · 47 lines · 6 code · 4 blank · 37 comment · 0 complexity · 7de3da92a3f6a4ef56bf906865d17296 MD5 · raw file

  1. /**
  2. * AmbientTalk/2 Project
  3. * ATNil.java created on 26-jul-2006 at 12:05:01
  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.objects;
  29. import edu.vub.at.exceptions.InterpreterException;
  30. import edu.vub.at.objects.grammar.ATExpression;
  31. /**
  32. * the native object representing 'nil' implements this interface.
  33. * The type ATNil is a subtype of ATObject.
  34. *
  35. * @author tvcutsem
  36. */
  37. public interface ATNil extends ATObject, ATExpression {
  38. /**
  39. * The <tt>!=</tt> operator which returns <tt>false</tt> only if
  40. * the passed parameter equals <tt>nil</tt>.
  41. */
  42. public ATBoolean base__opnot__opeql_(ATObject other) throws InterpreterException;
  43. }