meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
scan_statement [2021/02/08 18:16] – revuskyscan_statement [2021/08/07 08:21] (current) – [The SCAN construct also you to use contextual predicates.] revusky
Line 96: Line 96:
  
  
-==== The SCAN construct also you to use contextual predicates. ====+==== The SCAN construct allows you to use contextual predicates. ====
  
 The [[contextual_predicates]] construct allows you to express conditions based on scanning backwards in the lookahead/call stack. This can only be used in conjunction with the newer ''SCAN'' statement, not with the legacy ''LOOKAHEAD'' construct.  The [[contextual_predicates]] construct allows you to express conditions based on scanning backwards in the lookahead/call stack. This can only be used in conjunction with the newer ''SCAN'' statement, not with the legacy ''LOOKAHEAD'' construct.