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Text File  |  1989-07-12  |  2KB  |  65 lines
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  2. <H3><A ID="SECTION004411100000000000000"><tex2html_anchor_invisible_mark></A> <A ID="ch:new-event-specifications"><tex2html_anchor_mark></A><BR>
  3. Defining New Event Specifications
  4. </H3><#5124#>
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  9. <P>
  10. The syntax for event specifications can be extended to include new
  11. specification list forms defined by the programmer. 
  12. <A ID="1954"><tex2html_anchor_invisible_mark></A>
  13. The most general
  14. form of an event specification list is <#4353#><TT>(<#1955#><EM>keyword-symbol
  15. argument*</EM><#1955#>)</TT><#4353#>. The CLUE interface to this general form is defined by two
  16. functions: a check function, which verifies the syntactical
  17. correctness of the list, and a match function, which matches <#1956#><TT>event</TT><#1956#>
  18. objects with the list. The check  function for a <#1957#><EM>keyword-symbol</EM><#1957#>
  19. may be returned or changed by the <#1958#><TT>check-function</TT><#1958#> macro. 
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  22. <#4675#>
  23. <#4354#><FONT SIZE="+1"><#1959#><B>check-function Macro</B><#1959#></FONT><#4354#> 
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  36. The general interfaces
  37. required for  check/match functions are described below.
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